OSDN Git Service
Russell King [Wed, 4 Jan 2012 09:01:51 +0000 (09:01 +0000)]
Merge branch 'vmalloc' of git://git.linaro.org/people/nico/linux into devel-stable
Linus Walleij [Mon, 2 Jan 2012 13:50:15 +0000 (14:50 +0100)]
ARM: 7261/1: clocksource/ux500-prcmu: fix sched_clock breakage
commit
2f0778afac79bd8d226225556858a636931eeabc adding
runtime-selectable sched_clock() forgot to patch this
driver down in drivers/clocksource, this patch fixes
the problem.
Reported-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Jamie Iles [Wed, 14 Dec 2011 22:43:17 +0000 (23:43 +0100)]
ARM: 7236/1: vic: always use simple ops
Now that irq_domain_simple_ops are available for non-DT users, use them
in the VIC driver so that we don't get a NULL dereference in
irq_domain_to_irq() when registering the domain.
Cc: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Nicolas Pitre [Tue, 3 Jan 2012 04:00:32 +0000 (23:00 -0500)]
Revert "ARM: move VMALLOC_END down temporarily for shmobile"
This reverts commit
0af362f8440a78b970d5f215e234420fa87d0f3f as shmobile
is not using a non-standard memory layout anymore.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Magnus Damm [Tue, 3 Jan 2012 03:57:03 +0000 (22:57 -0500)]
ARM: mach-shmobile: use standard 2MiB coherent DMA memory size
The 158MiB memory area was used to support HD
resolution multimedia workloads using the same
legacy memory allocating solution as on SH.
There are no in-tree kernel dependencies on the
158MiB setting, and future development should
reserve and allocate memory using some other
method like for instance CMA.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Jamie Iles [Wed, 14 Dec 2011 22:43:16 +0000 (23:43 +0100)]
ARM: 7235/1: irqdomain: export irq_domain_simple_ops for !CONFIG_OF
irqdomain support is used in interrupt controller drivers that may not
have device tree support but only need the basic HW->Linux irq
translation. Rather than having each of these implement their own IRQ
domain, allow them to use the simple ops.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rob Herring <robherring2@gmail.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Mon, 19 Dec 2011 21:54:35 +0000 (21:54 +0000)]
Merge branch 'arm/common-kconfig-refactor+for-rmk' of git://git.linaro.org/people/dmart/linux-2.6-arm into devel-stable
Dave Martin [Mon, 12 Dec 2011 16:17:34 +0000 (16:17 +0000)]
imx6q: Remove unconditional dependency on l2x0 L2 cache support
The i.MX6 Quad SoC will work without the l2x0 L2 cache controller
support built into the kernel, so this patch removes the dependency
on CACHE_L2X0.
This makes the l2x0 support optional, so that it can be turned off
when desired for debugging purposes etc.
Since SOC_IMX6Q already depends on ARCH_IMX_V6_V7 and
ARCH_IMX_V6_V7 selects MIGHT_HAVE_CACHE_L2X0, there is no need to
select that option explicitly from SOC_IMX6Q.
Thanks to Shawn Guo for this suggestion. [1]
[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2011-November/074602.html
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Dave Martin [Mon, 12 Dec 2011 16:17:34 +0000 (16:17 +0000)]
highbank: Unconditionally require l2x0 L2 cache controller support
If running in the Normal World on a TrustZone-enabled SoC, Linux
does not have complete control over the L2 cache controller
configuration. The kernel cannot work reliably on such platforms
without the l2x0 cache support code built in.
This patch unconditionally enables l2x0 support for the Highbank
SoC.
Thanks to Rob Herring for this suggestion. [1]
[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2011-November/074495.html
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Dave Martin [Mon, 12 Dec 2011 16:17:34 +0000 (16:17 +0000)]
omap4: Unconditionally require l2x0 L2 cache controller support
If running in the Normal World on a TrustZone-enabled SoC, Linux
does not have complete control over the L2 cache controller
configuration. The kernel cannot work reliably on such platforms
without the l2x0 cache support code built in.
This patch unconditionally enables l2x0 support for the OMAP4 SoCs.
Thanks to Rob Herring for this suggestion. [1]
[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2011-November/074495.html
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Dave Martin [Wed, 7 Dec 2011 15:38:04 +0000 (15:38 +0000)]
ARM: SMP: Refactor Kconfig to be more maintainable
Making SMP depend on (huge list of MACH_ and ARCH_ configs) is
bothersome to maintain and likely to lead to merge conflicts.
This patch moves the knowledge of which platforms are SMP-capable
to the individual machines. To enable this, a new HAVE_SMP config
option is introduced to allow machines to indicate that they can
run in a SMP configuration.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
(for nomadik, ux500)
Acked-by: Tony Lindgren <tony@atomide.com>
(for omap)
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
(for exynos)
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
(for imx)
Acked-by: Olof Johansson <olof@lixom.net>
(for tegra)
Dave Martin [Tue, 29 Nov 2011 15:56:19 +0000 (15:56 +0000)]
ARM: l2x0/pl310: Refactor Kconfig to be more maintainable
Making CACHE_L2X0 depend on (huge list of MACH_ and ARCH_ configs)
is bothersome to maintain and likely to lead to merge conflicts.
This patch moves the knowledge of which platforms have a L2x0 or
PL310 cache controller to the individual machines. To enable this,
a new MIGHT_HAVE_CACHE_L2X0 config option is introduced to allow
machines to indicate that they may have such a cache controller
independently of each other.
Boards/SoCs which cannot reliably operate without the L2 cache
controller support will need to select CACHE_L2X0 directly from
their own Kconfigs instead. This applies to some TrustZone-enabled
boards where Linux runs in the Normal World, for example.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
(for cns3xxx)
Acked-by: Tony Lindgren <tony@atomide.com>
(for omap)
Acked-by: Shawn Guo <shawn.guo@linaro.org>
(for imx)
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
(for exynos)
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
(for imx)
Acked-by: Olof Johansson <olof@lixom.net>
(for tegra)
Linus Walleij [Wed, 14 Dec 2011 17:15:42 +0000 (18:15 +0100)]
ARM: 7233/1: ux500: remove overlapping iotable entries
The overlapping iotable mapping entries for the ux500 Cortex
A9 SCU, CPU control and TWD are no longer accepted by the
kernel. Remove the overlaps so the machine boots again.
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Cc: Rabin Vincent <rabin.vincent@stericsson.com>
Reported-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Marc Zyngier [Thu, 15 Dec 2011 11:19:23 +0000 (12:19 +0100)]
ARM: 7205/2: sched_clock: allow sched_clock to be selected at runtime
sched_clock() is yet another blocker on the road to the single
image. This patch implements an idea by Russell King:
http://www.spinics.net/lists/linux-omap/msg49561.html
Instead of asking the platform to implement both sched_clock()
itself and the rollover callback, simply register a read()
function, and let the ARM code care about sched_clock() itself,
the conversion to ns and the rollover. sched_clock() uses
this read() function as an indirection to the platform code.
If the platform doesn't provide a read(), the code falls back
to the jiffy counter (just like the default sched_clock).
This allow some simplifications and possibly some footprint gain
when multiple platforms are compiled in. Among the drawbacks,
the removal of the *_fixed_sched_clock optimization which could
negatively impact some platforms (sa1100, tegra, versatile
and omap).
Tested on 11MPCore, OMAP4 and Tegra.
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Colin Cross <ccross@android.com>
Cc: Erik Gilling <konkers@android.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Alessandro Rubini <rubini@unipv.it>
Cc: STEricsson <STEricsson_nomadik_linux@list.st.com>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Ben Dooks <ben-linux@fluff.org>
Tested-by: Jamie Iles <jamie@jamieiles.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Krzysztof Halasa <khc@pm.waw.pl>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Will Deacon [Mon, 6 Jun 2011 11:35:46 +0000 (12:35 +0100)]
ARM: kexec: use soft_restart for branching to the reboot buffer
Now that there is a common way to reset the machine, let's use it
instead of reinventing the wheel in the kexec backend.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Mon, 6 Jun 2011 14:49:23 +0000 (15:49 +0100)]
ARM: stop: execute platform callback from cpu_stop code
Sending IPI_CPU_STOP to a CPU causes it to execute a busy cpu_relax
loop forever. This makes it impossible to kexec successfully on an SMP
system since the secondary CPUs do not reset.
This patch adds a callback to platform_cpu_kill, defined when
CONFIG_HOTPLUG_CPU=y, from the ipi_cpu_stop handling code. This function
currently just returns 1 on all platforms that define it but allows them
to do something more sophisticated in the future.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Mon, 6 Jun 2011 11:28:54 +0000 (12:28 +0100)]
ARM: reset: implement soft_restart for jumping to a physical address
Tools such as kexec and CPU hotplug require a way to reset the processor
and branch to some code in physical space. This requires various bits of
jiggery pokery with the caches and MMU which, when it goes wrong, tends
to lock up the system.
This patch fleshes out the soft_restart implementation so that it
branches to the reset code using the identity mapping. This requires us
to change to a temporary stack, held within the kernel image as a static
array, to avoid conflicting with the new view of memory.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Wed, 8 Jun 2011 14:29:00 +0000 (15:29 +0100)]
ARM: lib: add call_with_stack function for safely changing stack
When disabling the MMU, it is necessary to take out a 1:1 identity map
of the reset code so that it can safely be executed with and without
the MMU active. To avoid the situation where the physical address of the
reset code aliases with the virtual address of the active stack (which
cannot be included in the 1:1 mapping), it is desirable to change to a
new stack at a location which is less likely to alias.
This code adds a new lib function, call_with_stack:
void call_with_stack(void (*fn)(void *), void *arg, void *sp);
which changes the stack to point at the sp parameter, before invoking
fn(arg) with the new stack selected.
Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Jamie Iles [Thu, 1 Dec 2011 10:16:46 +0000 (11:16 +0100)]
ARM: 7183/1: vic: register the VIC for ST-modified VIC's
When probing the VIC, the ST variant has a different probing method to
account for the extra interrupts which meant we didn't previously call
vic_register() which registered the irq_domain.
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Thu, 8 Dec 2011 18:02:04 +0000 (18:02 +0000)]
Merge branch 'for-rmk' of git://git./linux/kernel/git/cmarinas/linux into devel-stable
Conflicts:
arch/arm/mm/ioremap.c
Catalin Marinas [Tue, 22 Nov 2011 17:30:32 +0000 (17:30 +0000)]
ARM: LPAE: Add the Kconfig entries
This patch adds the ARM_LPAE and ARCH_PHYS_ADDR_T_64BIT Kconfig entries
allowing LPAE support to be compiled into the kernel.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Will Deacon [Tue, 22 Nov 2011 17:30:32 +0000 (17:30 +0000)]
ARM: LPAE: mark memory banks with start > ULONG_MAX as highmem
Memory banks living outside of the 32-bit physical address
space do not have a 1:1 pa <-> va mapping and therefore the
__va macro may wrap.
This patch ensures that such banks are marked as highmem so
that the Kernel doesn't try to split them up when it sees that
the wrapped virtual address overlaps the vmalloc space.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Catalin Marinas [Tue, 22 Nov 2011 17:30:32 +0000 (17:30 +0000)]
ARM: LPAE: Add identity mapping support for the 3-level page table format
With LPAE, the pgd is a separate page table with entries pointing to the
pmd. The identity_mapping_add() function needs to ensure that the pgd is
populated before populating the pmd level. The do..while blocks now loop
over the pmd in order to have the same implementation for the two page
table formats. The pmd_addr_end() definition has been removed and the
generic one used instead. The pmd clean-up is done in the pgd_free()
function.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:31 +0000 (17:30 +0000)]
ARM: LPAE: Add context switching support
With LPAE, TTBRx registers are 64-bit. The ASID is stored in TTBR0
rather than a separate Context ID register. This patch makes the
necessary changes to handle context switching on LPAE.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:31 +0000 (17:30 +0000)]
ARM: LPAE: Add fault handling support
The DFSR and IFSR register format is different when LPAE is enabled. In
addition, DFSR and IFSR have similar definitions for the fault type.
This modifies the fault code to correctly handle the new format.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:29 +0000 (17:30 +0000)]
ARM: LPAE: Invalidate the TLB before freeing the PMD
Similar to the PTE freeing, this patch introduced __pmd_free_tlb() which
invalidates the TLB before freeing a PMD page. This is needed because on
newer processors the entry in the upper page table may be cached by the
TLB and point to random data after the PMD has been freed.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:29 +0000 (17:30 +0000)]
ARM: LPAE: MMU setup for the 3-level page table format
This patch adds the MMU initialisation for the LPAE page table format.
The swapper_pg_dir size with LPAE is 5 rather than 4 pages. A new
proc-v7-3level.S file contains the TTB initialisation, context switch
and PTE setting code with the LPAE. The TTBRx split is based on the
PAGE_OFFSET with TTBR1 used for the kernel mappings. The 36-bit mappings
(supersections) and a few other memory types in mmu.c are conditionally
compiled.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:29 +0000 (17:30 +0000)]
ARM: LPAE: Page table maintenance for the 3-level format
This patch modifies the pgd/pmd/pte manipulation functions to support
the 3-level page table format. Since there is no need for an 'ext'
argument to cpu_set_pte_ext(), this patch conditionally defines a
different prototype for this function when CONFIG_ARM_LPAE.
The patch also introduces the L_PGD_SWAPPER flag to mark pgd entries
pointing to pmd tables pre-allocated in the swapper_pg_dir and avoid
trying to free them at run-time. This flag is 0 with the classic page
table format.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:29 +0000 (17:30 +0000)]
ARM: LPAE: Introduce the 3-level page table format definitions
This patch introduces the pgtable-3level*.h files with definitions
specific to the LPAE page table format (3 levels of page tables).
Each table is 4KB and has 512 64-bit entries. An entry can point to a
40-bit physical address. The young, write and exec software bits share
the corresponding hardware bits (negated). Other software bits use spare
bits in the PTE.
The patch also changes some variable types from unsigned long or int to
pteval_t or pgprot_t.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Will Deacon [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: LPAE: add ISBs around MMU enabling code
Before we enable the MMU, we must ensure that the TTBR registers contain
sane values. After the MMU has been enabled, we jump to the *virtual*
address of the following function, so we also need to ensure that the
SCTLR write has taken effect.
This patch adds ISB instructions around the SCTLR write to ensure the
visibility of the above.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: LPAE: Factor out classic-MMU specific code into proc-v7-2level.S
This patch modifies the proc-v7.S file so that it only contains code
shared between classic MMU and LPAE. The non-common code is factored out
into a separate file.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: LPAE: Move the FSR definitions to separate files
The FSR structure is different with LPAE and this patch moves the
classic MMU specific definition to a separate fsr-2level.c file that is
included in fault.c. It also moves the fsr_fs and FSR bits to the
fault.h file.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: LPAE: Move page table maintenance macros to pgtable-2level.h
The page table maintenance macros need to be duplicated between the
classic and the LPAE MMU so this patch moves those that are not common
to the pgtable-2level.h file.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Russell King [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: pgtable: switch to use pgtable-nopud.h
Nick Piggin noted upon introducing 4level-fixup.h:
| Add a temporary "fallback" header so architectures can run with
| the 4level pagetables patch without modification. All architectures
| should be converted to use the folding headers (include/asm-generic/
| pgtable-nop?d.h) as soon as possible, and the fallback header removed.
This makes ARM compliant with this statement.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Catalin Marinas [Tue, 22 Nov 2011 17:30:27 +0000 (17:30 +0000)]
ARM: pgtable: Fix compiler warning in ioremap.c introduced by nopud
With the arch/arm code conversion to pgtable-nopud.h, the section and
supersection (un|re)map code triggers compiler warnings on UP systems.
This is caused by pmd_offset() being given a pgd_t argument rather than
a pud_t one. This patch makes the necessary conversion with the
assumption that the pud is folded into the pgd. The page table setting
code only loops over the pmd which is enough with the classic page
tables. This code is not compiled when LPAE is enabled.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Russell King [Tue, 6 Dec 2011 20:27:54 +0000 (20:27 +0000)]
Merge branch 'kexec/idmap' of git://git./linux/kernel/git/will/linux into devel-stable
Tony Lindgren [Tue, 6 Dec 2011 16:50:42 +0000 (17:50 +0100)]
ARM: 7194/1: OMAP: Fix build after a merge between v3.2-rc4 and ARM restart changes
ARM restart changes needed changes to common.h to make it local.
This conflicted with v3.2-rc4 DSS related hwmod changes that
git mergetool was not able to handle.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Will Deacon [Wed, 23 Nov 2011 12:26:25 +0000 (12:26 +0000)]
ARM: SMP: use idmap_pgd for mapping MMU enable during secondary booting
The ARM SMP booting code allocates a temporary set of page tables
containing an identity mapping of the kernel image and provides this
to secondary CPUs for initial booting.
In reality, we only need to include the __turn_mmu_on function in the
identity mapping since the rest of the kernel is executing from virtual
addresses after this point.
This patch adds __turn_mmu_on to the .idmap.text section, allowing the
SMP booting code to use the idmap_pgd directly and not have to populate
its own set of page table.
As a result of this patch, we can make the identity_mapping_add function
static (since it is only used within mm/idmap.c) and also remove the
identity_mapping_del function. The identity map population is moved to
an early initcall so that it is setup in time for secondary CPU bringup.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Wed, 23 Nov 2011 12:03:27 +0000 (12:03 +0000)]
ARM: head.S: only include __turn_mmu_on in the initial identity mapping
__create_page_tables identity maps the region of memory from
__enable_mmu to the end of __turn_mmu_on.
In preparation for including __turn_mmu_on in the .idmap.text section,
this patch modifies the identity mapping so that it only includes the
__turn_mmu_on code.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Wed, 8 Jun 2011 14:53:34 +0000 (15:53 +0100)]
ARM: idmap: use idmap_pgd when setting up mm for reboot
For soft-rebooting a system, it is necessary to map the MMU-off code
with an identity mapping so that execution can continue safely once the
MMU has been switched off.
Currently, switch_mm_for_reboot takes out a 1:1 mapping from 0x0 to
TASK_SIZE during reboot in the hope that the reset code lives at a
physical address corresponding to a userspace virtual address.
This patch modifies the code so that we switch to the idmap_pgd tables,
which contain a 1:1 mapping of the cpu_reset code. This has the
advantage of only remapping the code that we need and also means we
don't need to worry about allocating a pgd from an atomic context in the
case that the physical address of the cpu_reset code aliases with the
virtual space used by the kernel.
Acked-by: Dave Martin <dave.martin@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Tue, 15 Nov 2011 13:25:04 +0000 (13:25 +0000)]
ARM: proc-*.S: place cpu_reset functions into .idmap.text section
The CPU reset functions disable the MMU and therefore must be executed
with an identity mapping in place.
This patch places the CPU reset functions into the .idmap.text section,
causing the idmap code to include them as part of the identity mapping.
Acked-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Tue, 15 Nov 2011 11:11:19 +0000 (11:11 +0000)]
ARM: suspend: use idmap_pgd instead of suspend_pgd
The ARM CPU suspend code requires cpu_resume_mmu to be identity mapped
in order to re-enable the MMU when coming out of suspend. Currently,
this is accomplished by maintaining a suspend_pgd with the relevant
mapping put in place at init time.
This patch replaces the use of suspend_pgd with the new idmap_pgd.
cpu_resume_mmu is placed in the .idmap.text section so that it is
included in the identity map.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Dave Martin <dave.martin@linaro.org>
Tested-by: Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Fri, 30 Sep 2011 10:43:29 +0000 (11:43 +0100)]
ARM: idmap: populate identity map pgd at init time using .init.text
When disabling and re-enabling the MMU, it is necessary to take out an
identity mapping for the code that manipulates the SCTLR in order to
avoid it disappearing from under our feet. This is useful when soft
rebooting and returning from CPU suspend.
This patch allocates a set of page tables during boot and populates them
with an identity mapping for the .idmap.text section. This means that
users of the identity map do not need to manage their own pgd and can
instead annotate their functions with __idmap or, in the case of assembly
code, place them in the correct section.
Acked-by: Dave Martin <dave.martin@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Tony Lindgren [Tue, 6 Dec 2011 04:45:37 +0000 (05:45 +0100)]
ARM: 7192/1: OMAP: Fix build error for omap1_defconfig
Otherwise we get the following error:
In function 'omap_init_consistent_dma_size':
error: implicit declaration of function 'init_consistent_dma_size'
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Mon, 5 Dec 2011 23:27:54 +0000 (23:27 +0000)]
Merge branch 'vmalloc' of git://git.linaro.org/people/nico/linux into devel-stable
Russell King [Mon, 5 Dec 2011 23:20:17 +0000 (23:20 +0000)]
Merge branch 'for-rmk' of git://git./linux/kernel/git/will/linux into devel-stable
Conflicts:
arch/arm/common/gic.c
arch/arm/plat-omap/include/plat/common.h
Santosh Shilimkar [Mon, 5 Dec 2011 08:46:24 +0000 (09:46 +0100)]
ARM: 7189/1: OMAP3: Fix build break in cpuidle34xx.c because of irq function
Fix the below build break by including common.h
arch/arm/mach-omap2/cpuidle34xx.c: In function 'omap3_enter_idle':
arch/arm/mach-omap2/cpuidle34xx.c:117: error: implicit declaration of function 'omap_irq_pending'
make[1]: *** [arch/arm/mach-omap2/cpuidle34xx.o] Error 1
make: *** [arch/arm/mach-omap2] Error 2
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Santosh Shilimkar [Mon, 5 Dec 2011 08:44:58 +0000 (09:44 +0100)]
ARM: 7188/1: OMAP2PLUS: Fix build error: 'omap2/omap3_intc_handle_irq' undeclared.
Fix the build break by adding the necessary irq functions to
common header.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Sat, 3 Dec 2011 09:11:54 +0000 (09:11 +0000)]
Merge branch 'irqchip-consolidation' of git://git./linux/kernel/git/maz/arm-platforms into devel-stable
Will Deacon [Fri, 2 Dec 2011 15:22:18 +0000 (15:22 +0000)]
Merge branches 'perf/event-nos', 'perf/updates' and 'perf/omap4' into for-rmk
Ming Lei [Wed, 2 Mar 2011 07:00:08 +0000 (15:00 +0800)]
arm: pmu: allow platform specific irq enable/disable handling
This patch introduces .enable_irq and .disable_irq into
struct arm_pmu_platdata, so platform specific irq enablement
can be handled after request_irq, and platform specific irq
disablement can be handled before free_irq.
This patch is for support of pmu irq routed from CTI on omap4.
Acked-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Ming Lei [Mon, 24 Oct 2011 14:45:53 +0000 (15:45 +0100)]
arm: introduce cross trigger interface helpers
OMAP4 uses cross trigger interface(CTI) to route
performance monitor irq to GIC, so introduce cti
helpers to make access for cti easily.
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Mon, 14 Nov 2011 10:33:05 +0000 (10:33 +0000)]
ARM: perf: remove unused armpmu_get_max_events
armpmu_get_max_events is only called from perf_num_counters, so we can
inline it there. It existed as a separate entity as a hangover from
the original perf-based oprofile implementation.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Thu, 29 Sep 2011 17:23:39 +0000 (18:23 +0100)]
ARM: perf: add support for stalled cycle ABI events
Commit
8f622422 ("perf events: Add generic front-end and back-end
stalled cycle event definitions") added two new ABI events for counting
stalled cycles.
This patch adds support for these new events to the ARM perf
implementation.
Cc: Jamie Iles <jamie@jamieiles.com>
Cc: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Thu, 29 Sep 2011 14:29:02 +0000 (15:29 +0100)]
ARM: perf: clean and update ARMv7 event numbers
This patch updates the ARMv7 perf event numbers so that:
(1) A consistent naming scheme is used between different CPUs.
(2) Only events actually used by Linux are described.
(3) Where possible, architected events are used in preference to
CPU-specific events.
This results in the removal of a load of unused, hardcoded data and
makes it more clear as to which events are supported on each PMU.
Cc: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Axel Lin [Thu, 1 Dec 2011 15:25:45 +0000 (23:25 +0800)]
ARM: exynos4: Fix build error
Trivial fix to fix below build error:
CC arch/arm/mach-exynos/mach-universal_c210.o
arch/arm/mach-exynos/mach-universal_c210.c:24: error: expected identifier or '(' before '<' token
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Axel Lin [Thu, 1 Dec 2011 15:24:30 +0000 (23:24 +0800)]
ARM: exynos4: Fix build error due to 'gic_bank_offset' undeclared
Fix below build error:
CC arch/arm/mach-exynos/cpu.o
arch/arm/mach-exynos/cpu.c: In function 'exynos4_init_irq':
arch/arm/mach-exynos/cpu.c:245: error: 'gic_bank_offset' undeclared (first use in this function)
arch/arm/mach-exynos/cpu.c:245: error: (Each undeclared identifier is reported only once
arch/arm/mach-exynos/cpu.c:245: error: for each function it appears in.)
arch/arm/mach-exynos/cpu.c:243: warning: unused variable 'bank_offset'
make[1]: *** [arch/arm/mach-exynos/cpu.o] Error 1
make: *** [arch/arm/mach-exynos] Error 2
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Linus Torvalds [Thu, 1 Dec 2011 22:56:01 +0000 (14:56 -0800)]
Linux 3.2-rc4
Linus Torvalds [Thu, 1 Dec 2011 22:55:34 +0000 (14:55 -0800)]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (31 commits)
ocfs2: avoid unaligned access to dqc_bitmap
ocfs2: Use filemap_write_and_wait() instead of write_inode_now()
ocfs2: honor O_(D)SYNC flag in fallocate
ocfs2: Add a missing journal credit in ocfs2_link_credits() -v2
ocfs2: send correct UUID to cleancache initialization
ocfs2: Commit transactions in error cases -v2
ocfs2: make direntry invalid when deleting it
fs/ocfs2/dlm/dlmlock.c: free kmem_cache_zalloc'd data using kmem_cache_free
ocfs2: Avoid livelock in ocfs2_readpage()
ocfs2: serialize unaligned aio
ocfs2: Implement llseek()
ocfs2: Fix ocfs2_page_mkwrite()
ocfs2: Add comment about orphan scanning
ocfs2: Clean up messages in the fs
ocfs2/cluster: Cluster up now includes network connections too
ocfs2/cluster: Add new function o2net_fill_node_map()
ocfs2/cluster: Fix output in file elapsed_time_in_ms
ocfs2/dlm: dlmlock_remote() needs to account for remastery
ocfs2/dlm: Take inflight reference count for remotely mastered resources too
ocfs2/dlm: Cleanup dlm_wait_for_node_death() and dlm_wait_for_node_recovery()
...
Akinobu Mita [Tue, 15 Nov 2011 22:56:34 +0000 (14:56 -0800)]
ocfs2: avoid unaligned access to dqc_bitmap
The dqc_bitmap field of struct ocfs2_local_disk_chunk is 32-bit aligned,
but not 64-bit aligned. The dqc_bitmap is accessed by ocfs2_set_bit(),
ocfs2_clear_bit(), ocfs2_test_bit(), or ocfs2_find_next_zero_bit(). These
are wrapper macros for ext2_*_bit() which need to take an unsigned long
aligned address (though some architectures are able to handle unaligned
address correctly)
So some 64bit architectures may not be able to access the dqc_bitmap
correctly.
This avoids such unaligned access by using another wrapper functions for
ext2_*_bit(). The code is taken from fs/ext4/mballoc.c which also need to
handle unaligned bitmap access.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
Linus Torvalds [Thu, 1 Dec 2011 19:53:54 +0000 (11:53 -0800)]
Merge branch 'fixes' of ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm
* 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm:
ARM: 7182/1: ARM cpu topology: fix warning
ARM: 7181/1: Restrict kprobes probing SWP instructions to ARMv5 and below
ARM: 7180/1: Change kprobes testcase with unpredictable STRD instruction
ARM: 7177/1: GIC: avoid skipping non-existent PPIs in irq_start calculation
ARM: 7176/1: cpu_pm: register GIC PM notifier only once
ARM: 7175/1: add subname parameter to mfp_set_groupg callers
ARM: 7174/1: Fix build error in kprobes test code on Thumb2 kernels
ARM: 7172/1: dma: Drop GFP_COMP for DMA memory allocations
ARM: 7171/1: unwind: add unwind directives to bitops assembly macros
ARM: 7170/2: fix compilation breakage in entry-armv.S
ARM: 7168/1: use cache type functions for arch_get_unmapped_area
ARM: perf: check that we have a platform device when reserving PMU
ARM: 7166/1: Use PMD_SHIFT instead of PGDIR_SHIFT in dma-consistent.c
ARM: 7165/2: PL330: Fix typo in _prepare_ccr()
ARM: 7163/2: PL330: Only register usable channels
ARM: 7162/1: errata: tidy up Kconfig options for PL310 errata workarounds
ARM: 7161/1: errata: no automatic store buffer drain
ARM: perf: initialise used_mask for fake PMU during validation
ARM: PMU: remove pmu_init declaration
ARM: PMU: re-export release_pmu symbol to modules
Linus Torvalds [Thu, 1 Dec 2011 16:28:53 +0000 (08:28 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix meta data raid-repair merge problem
Btrfs: skip allocation attempt from empty cluster
Btrfs: skip block groups without enough space for a cluster
Btrfs: start search for new cluster at the beginning
Btrfs: reset cluster's max_size when creating bitmap
Btrfs: initialize new bitmaps' list
Btrfs: fix oops when calling statfs on readonly device
Btrfs: Don't error on resizing FS to same size
Btrfs: fix deadlock on metadata reservation when evicting a inode
Fix URL of btrfs-progs git repository in docs
btrfs scrub: handle -ENOMEM from init_ipath()
Jan Schmidt [Thu, 1 Dec 2011 14:30:36 +0000 (09:30 -0500)]
Btrfs: fix meta data raid-repair merge problem
Commit
4a54c8c16 introduced raid-repair, killing the individual
readpage_io_failed_hook entries from inode.c and disk-io.c. Commit
4bb31e92 introduced new readahead code, adding a readpage_io_failed_hook to
disk-io.c.
The raid-repair commit had logic to disable raid-repair, if
readpage_io_failed_hook is set. Thus, the readahead commit effectively
disabled raid-repair for meta data.
This commit changes the logic to always attempt raid-repair when needed and
call the readpage_io_failed_hook in case raid-repair fails. This is much
more straight forward and should have been like that from the beginning.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Reported-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Linus Torvalds [Thu, 1 Dec 2011 00:25:02 +0000 (16:25 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
IB: Fix RCU lockdep splats
IB/ipoib: Prevent hung task or softlockup processing multicast response
IB/qib: Fix over-scheduling of QSFP work
RDMA/cxgb4: Fix retry with MPAv1 logic for MPAv2
RDMA/cxgb4: Fix iw_cxgb4 count_rcqes() logic
IB/qib: Don't use schedule_work()
Linus Torvalds [Thu, 1 Dec 2011 00:24:43 +0000 (16:24 -0800)]
Merge branch 'dt-for-linus' of git://sources.calxeda.com/kernel/linux
* 'dt-for-linus' of git://sources.calxeda.com/kernel/linux:
of: Add Silicon Image vendor prefix
of/irq: of_irq_init: add check for parent equal to child node
Linus Torvalds [Thu, 1 Dec 2011 00:24:24 +0000 (16:24 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/broonie/regulator
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: twl: fix twl4030 support for smps regulators
regulator: fix use after free bug
regulator: aat2870: Fix the logic of checking if no id is matched in aat2870_get_regulator
Linus Torvalds [Thu, 1 Dec 2011 00:23:59 +0000 (16:23 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/arm/arm-soc
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (45 commits)
ARM: ux500: update defconfig
ARM: u300: update defconfig
ARM: at91: enable additional boards in existing soc defconfig files
ARM: at91: refresh soc defconfig files for 3.2
ARM: at91: rename defconfig files appropriately
ARM: OMAP2+: Fix Compilation error when omap_l3_noc built as module
ARM: OMAP2+: Remove empty io.h
ARM: OMAP2: select ARM_AMBA if OMAP3_EMU is defined
ARM: OMAP: smartreflex: fix IRQ handling bug
ARM: OMAP: PM: only register TWL with voltage layer when device is present
ARM: OMAP: hwmod: Fix the addr space, irq, dma count APIs
arm: mx28: fix bit operation in clock setting
ARM: imx: export imx_ioremap
ARM: imx/mm-imx3: conditionally compile i.MX31 and i.MX35 code
ARM: mx5: Fix checkpatch warnings in cpu-imx5.c
MAINTAINERS: Add missing directory
ARM: imx: drop 'ARCH_MX31' and 'ARCH_MX35'
ARM: imx6q: move clock register map to machine_desc.map_io
ARM: pxa168/gplugd: add the correct SSP device
ARM: Update mach-types to fix mxs build breakage
...
Vincent Guittot [Tue, 29 Nov 2011 14:50:20 +0000 (15:50 +0100)]
ARM: 7182/1: ARM cpu topology: fix warning
kernel/sched.c:7354:2: warning: initialization from incompatible pointer type
Align cpu_coregroup_mask prototype interface with sched_domain_mask_f typedef
use int cpu instead of unsigned int cpu
Cc: <stable@vger.kernel.org>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Jon Medhurst (Tixy) [Tue, 29 Nov 2011 07:16:02 +0000 (08:16 +0100)]
ARM: 7181/1: Restrict kprobes probing SWP instructions to ARMv5 and below
The SWP instruction is deprecated on ARMv6 and with ARMv7 it will be
UNDEFINED when CONFIG_SWP_EMULATE is selected. In this case, probing a
SWP instruction will cause an oops when the kprobes emulation code
executes an undefined instruction.
As the SWP instruction should be rare or non-existent in kernels for
ARMv6 and later, we can simply avoid these problems by not allowing
probing of these.
Reported-by: Leif Lindholm <leif.lindholm@arm.com>
Tested-by: Leif Lindholm <leif.lindholm@arm.com>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Jon Medhurst (Tixy) [Tue, 29 Nov 2011 07:14:35 +0000 (08:14 +0100)]
ARM: 7180/1: Change kprobes testcase with unpredictable STRD instruction
There is a kprobes testcase for the instruction "strd r2, [r3], r4".
This has unpredictable behaviour as it uses r3 for register writeback
addressing and also stores it to memory.
On a cortex A9, this testcase would fail because the instruction writes
the updated value of r3 to memory, whereas the kprobes emulation code
writes the original value.
Fix this by changing testcase to used r5 instead of r3.
Reported-by: Leif Lindholm <leif.lindholm@arm.com>
Tested-by: Leif Lindholm <leif.lindholm@arm.com>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Alexandre Oliva [Wed, 30 Nov 2011 18:43:00 +0000 (13:43 -0500)]
Btrfs: skip allocation attempt from empty cluster
If we don't have a cluster, don't bother trying to allocate from it,
jumping right away to the attempt to allocate a new cluster.
Signed-off-by: Alexandre Oliva <oliva@lsd.ic.unicamp.br>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Alexandre Oliva [Wed, 30 Nov 2011 18:43:00 +0000 (13:43 -0500)]
Btrfs: skip block groups without enough space for a cluster
We test whether a block group has enough free space to hold the
requested block, but when we're doing clustered allocation, we can
save some cycles by testing whether it has enough room for the cluster
upfront, otherwise we end up attempting to set up a cluster and
failing. Only in the NO_EMPTY_SIZE loop do we attempt an unclustered
allocation, and by then we'll have zeroed the cluster size, so this
patch won't stop us from using the block group as a last resort.
Signed-off-by: Alexandre Oliva <oliva@lsd.ic.unicamp.br>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Alexandre Oliva [Wed, 30 Nov 2011 18:43:00 +0000 (13:43 -0500)]
Btrfs: start search for new cluster at the beginning
Instead of starting at zero (offset is always zero), request a cluster
starting at search_start, that denotes the beginning of the current
block group.
Signed-off-by: Alexandre Oliva <oliva@lsd.ic.unicamp.br>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Alexandre Oliva [Wed, 30 Nov 2011 18:43:00 +0000 (13:43 -0500)]
Btrfs: reset cluster's max_size when creating bitmap
The field that indicates the size of the largest contiguous chunk of
free space in the cluster is not initialized when setting up bitmaps,
it's only increased when we find a larger contiguous chunk. We end up
retaining a larger value than appropriate for highly-fragmented
clusters, which may cause pointless searches for large contiguous
groups, and even cause clusters that do not meet the density
requirements to be set up.
Signed-off-by: Alexandre Oliva <oliva@lsd.ic.unicamp.br>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Alexandre Oliva [Mon, 28 Nov 2011 14:04:43 +0000 (12:04 -0200)]
Btrfs: initialize new bitmaps' list
We're failing to create clusters with bitmaps because
setup_cluster_no_bitmap checks that the list is empty before inserting
the bitmap entry in the list for setup_cluster_bitmap, but the list
field is only initialized when it is restored from the on-disk free
space cache, or when it is written out to disk.
Besides a potential race condition due to the multiple use of the list
field, filesystem performance severely degrades over time: as we use
up all non-bitmap free extents, the try-to-set-up-cluster dance is
done at every metadata block allocation. For every block group, we
fail to set up a cluster, and after failing on them all up to twice,
we fall back to the much slower unclustered allocation.
To make matters worse, before the unclustered allocation, we try to
create new block groups until we reach the 1% threshold, which
introduces additional bitmaps and thus block groups that we'll iterate
over at each metadata block request.
Li Zefan [Mon, 28 Nov 2011 08:43:00 +0000 (16:43 +0800)]
Btrfs: fix oops when calling statfs on readonly device
To reproduce this bug:
# dd if=/dev/zero of=img bs=1M count=256
# mkfs.btrfs img
# losetup -r /dev/loop1 img
# mount /dev/loop1 /mnt
OOPS!!
It triggered BUG_ON(!nr_devices) in btrfs_calc_avail_data_space().
To fix this, instead of checking write-only devices, we check all open
deivces:
# df -h /dev/loop1
Filesystem Size Used Avail Use% Mounted on
/dev/loop1 250M 28K 238M 1% /mnt
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Mike Fleetwood [Fri, 18 Nov 2011 18:55:01 +0000 (18:55 +0000)]
Btrfs: Don't error on resizing FS to same size
It seems overly harsh to fail a resize of a btrfs file system to the
same size when a shrink or grow would succeed. User app GParted trips
over this error. Allow it by bypassing the shrink or grow operation.
Signed-off-by: Mike Fleetwood <mike.fleetwood@googlemail.com>
Miao Xie [Fri, 18 Nov 2011 09:43:00 +0000 (17:43 +0800)]
Btrfs: fix deadlock on metadata reservation when evicting a inode
When I ran the xfstests, I found the test tasks was blocked on meta-data
reservation.
By debugging, I found the reason of this bug:
start transaction
|
v
reserve meta-data space
|
v
flush delay allocation -> iput inode -> evict inode
^ |
| v
wait for delay allocation flush <- reserve meta-data space
And besides that, the flush on evicting inode will block the thread, which
is reclaiming the memory, and make oom happen easily.
Fix this bug by skipping the flush step when evicting inode.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Arnd Hannemann [Wed, 16 Nov 2011 16:35:37 +0000 (17:35 +0100)]
Fix URL of btrfs-progs git repository in docs
The location of the btrfs-progs repository has been changed.
This patch updates the documentation accordingly.
Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
Dan Carpenter [Wed, 16 Nov 2011 08:28:01 +0000 (11:28 +0300)]
btrfs scrub: handle -ENOMEM from init_ipath()
init_ipath() can return an ERR_PTR(-ENOMEM).
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Roland Dreier [Wed, 30 Nov 2011 02:01:53 +0000 (18:01 -0800)]
Merge branches 'cxgb4', 'ipoib', 'misc' and 'qib' into for-next
Linus Torvalds [Tue, 29 Nov 2011 22:43:22 +0000 (14:43 -0800)]
Merge branch 'pm-fixes' of git://git./linux/kernel/git/rafael/linux-pm
* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM: Update comments describing device power management callbacks
PM / Sleep: Update documentation related to system wakeup
PM / Runtime: Make documentation follow the new behavior of irq_safe
PM / Sleep: Correct inaccurate information in devices.txt
PM / Domains: Document how PM domains are used by the PM core
PM / Hibernate: Do not leak memory in error/test code paths
Eric Dumazet [Tue, 29 Nov 2011 21:31:23 +0000 (22:31 +0100)]
IB: Fix RCU lockdep splats
Commit
f2c31e32b37 ("net: fix NULL dereferences in check_peer_redir()")
forgot to take care of infiniband uses of dst neighbours.
Many thanks to Marc Aurele who provided a nice bug report and feedback.
Reported-by: Marc Aurele La France <tsi@ualberta.ca>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>
Cc: <stable@kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Mike Marciniszyn [Mon, 21 Nov 2011 13:43:54 +0000 (08:43 -0500)]
IB/ipoib: Prevent hung task or softlockup processing multicast response
This following can occur with ipoib when processing a multicast reponse:
BUG: soft lockup - CPU#0 stuck for 67s! [ib_mad1:982]
Modules linked in: ...
CPU 0:
Modules linked in: ...
Pid: 982, comm: ib_mad1 Not tainted 2.6.32-131.0.15.el6.x86_64 #1 ProLiant DL160 G5
RIP: 0010:[<
ffffffff814ddb27>] [<
ffffffff814ddb27>] _spin_unlock_irqrestore+0x17/0x20
RSP: 0018:
ffff8802119ed860 EFLAGS:
00000246
0000000000000004 RBX:
ffff8802119ed860 RCX:
000000000000a299
RDX:
ffff88021086c700 RSI:
0000000000000246 RDI:
0000000000000246
RBP:
ffffffff8100bc8e R08:
ffff880210ac229c R09:
0000000000000000
R10:
ffff88021278aab8 R11:
0000000000000000 R12:
ffff8802119ed860
R13:
ffffffff8100be6e R14:
0000000000000001 R15:
0000000000000003
FS:
0000000000000000(0000) GS:
ffff880028200000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0018 ES: 0018 CR0:
000000008005003b
CR2:
00000000006d4840 CR3:
0000000209aa5000 CR4:
00000000000406f0
DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
DR3:
0000000000000000 DR6:
00000000ffff0ff0 DR7:
0000000000000400
Call Trace:
[<
ffffffffa032c247>] ? ipoib_mcast_send+0x157/0x480 [ib_ipoib]
[<
ffffffff8100bc8e>] ? apic_timer_interrupt+0xe/0x20
[<
ffffffff8100bc8e>] ? apic_timer_interrupt+0xe/0x20
[<
ffffffffa03283d4>] ? ipoib_path_lookup+0x124/0x2d0 [ib_ipoib]
[<
ffffffffa03286fc>] ? ipoib_start_xmit+0x17c/0x430 [ib_ipoib]
[<
ffffffff8141e758>] ? dev_hard_start_xmit+0x2c8/0x3f0
[<
ffffffff81439d0a>] ? sch_direct_xmit+0x15a/0x1c0
[<
ffffffff81423098>] ? dev_queue_xmit+0x388/0x4d0
[<
ffffffffa032d6b7>] ? ipoib_mcast_join_finish+0x2c7/0x510 [ib_ipoib]
[<
ffffffffa032dab8>] ? ipoib_mcast_sendonly_join_complete+0x1b8/0x1f0 [ib_ipoib]
[<
ffffffffa02a0946>] ? mcast_work_handler+0x1a6/0x710 [ib_sa]
[<
ffffffffa015f01e>] ? ib_send_mad+0xfe/0x3c0 [ib_mad]
[<
ffffffffa00f6c93>] ? ib_get_cached_lmc+0xa3/0xb0 [ib_core]
[<
ffffffffa02a0f9b>] ? join_handler+0xeb/0x200 [ib_sa]
[<
ffffffffa029e4fc>] ? ib_sa_mcmember_rec_callback+0x5c/0xa0 [ib_sa]
[<
ffffffffa029e79c>] ? recv_handler+0x3c/0x70 [ib_sa]
[<
ffffffffa01603a4>] ? ib_mad_completion_handler+0x844/0x9d0 [ib_mad]
[<
ffffffffa015fb60>] ? ib_mad_completion_handler+0x0/0x9d0 [ib_mad]
[<
ffffffff81088830>] ? worker_thread+0x170/0x2a0
[<
ffffffff8108e160>] ? autoremove_wake_function+0x0/0x40
[<
ffffffff810886c0>] ? worker_thread+0x0/0x2a0
[<
ffffffff8108ddf6>] ? kthread+0x96/0xa0
[<
ffffffff8100c1ca>] ? child_rip+0xa/0x20
Coinciding with stack trace is the following message:
ib0: ib_address_create failed
The code below in ipoib_mcast_join_finish() will note the above
failure in the address handle but otherwise continue:
ah = ipoib_create_ah(dev, priv->pd, &av);
if (!ah) {
ipoib_warn(priv, "ib_address_create failed\n");
} else {
The while loop at the bottom of ipoib_mcast_join_finish() will attempt
to send queued multicast packets in mcast->pkt_queue and eventually
end up in ipoib_mcast_send():
if (!mcast->ah) {
if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
skb_queue_tail(&mcast->pkt_queue, skb);
else {
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
}
My read is that the code will requeue the packet and return to the
ipoib_mcast_join_finish() while loop and the stage is set for the
"hung" task diagnostic as the while loop never sees a non-NULL ah, and
will do nothing to resolve.
There are GFP_ATOMIC allocates in the provider routines, so this is
possible and should be dealt with.
The test that induced the failure is associated with a host SM on the
same server during a shutdown.
This patch causes ipoib_mcast_join_finish() to exit with an error
which will flush the queued mcast packets. Nothing is done to unwind
the QP attached state so that subsequent sends from above will retry
the join.
Reviewed-by: Ram Vepa <ram.vepa@qlogic.com>
Reviewed-by: Gary Leshner <gary.leshner@qlogic.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Linus Torvalds [Tue, 29 Nov 2011 19:13:22 +0000 (11:13 -0800)]
Merge branch 'slab/urgent' of git://git./linux/kernel/git/penberg/linux
* 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux:
slub: avoid potential NULL dereference or corruption
slub: use irqsafe_cpu_cmpxchg for put_cpu_partial
slub: move discard_slab out of node lock
slub: use correct parameter to add a page to partial list tail
Linus Torvalds [Tue, 29 Nov 2011 16:59:12 +0000 (08:59 -0800)]
Merge branch 'dev' of git://git./linux/kernel/git/tytso/ext4
* 'dev' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: fix racy use-after-free in ext4_end_io_dio()
Arnd Bergmann [Tue, 29 Nov 2011 14:50:17 +0000 (14:50 +0000)]
Merge branch 'defconfigs-for-arnd' of git://git.linaro.org/people/triad/linux-stericsson into fixes
Pawel Moll [Tue, 8 Nov 2011 11:35:20 +0000 (11:35 +0000)]
of: Add Silicon Image vendor prefix
"sil" is the most commonly used abbreviation for Silicon
Image products.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Rob Herring [Mon, 28 Nov 2011 02:16:33 +0000 (20:16 -0600)]
of/irq: of_irq_init: add check for parent equal to child node
With the revert of "of/irq: of_irq_find_parent: check for parent equal to
child" (
dc9372808412edb), we need another way to handle parent node equal
to the child node. This can simply be handled in of_irq_init by checking
for this condition.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Tested-by: Pawel Moll <pawel.moll@arm.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Linus Walleij [Wed, 16 Nov 2011 19:30:35 +0000 (20:30 +0100)]
ARM: ux500: update defconfig
This updates the Ux500 defconfig with the new drivers for HWSEM
and AB5500 core that were merged in the 3.2 cycle.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Linus Walleij [Wed, 16 Nov 2011 19:44:13 +0000 (20:44 +0100)]
ARM: u300: update defconfig
This updates the U300 defconfig to support some new drivers like
FSMC, sets it to use the MMC clock gating scheme, and removes
some stale config options.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Linus Torvalds [Tue, 29 Nov 2011 03:28:32 +0000 (19:28 -0800)]
Merge branch 'hwmon-for-linus' of git://git./linux/kernel/git/groeck/linux-staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: convert drivers/hwmon/* to use module_platform_driver()
hwmon: Remove redundant spi driver bus initialization
Linus Torvalds [Tue, 29 Nov 2011 00:37:35 +0000 (16:37 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/aegl/linux
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
efivars: add missing parameter to efi_pstore_read()
Christoph Fritz [Mon, 28 Nov 2011 22:49:33 +0000 (23:49 +0100)]
efivars: add missing parameter to efi_pstore_read()
In the case where CONFIG_PSTORE=n, the function efi_pstore_read() doesn't
have the correct list of parameters. This patch provides a definition
of efi_pstore_read() with 'char **buf' added to fix this warning:
"drivers/firmware/efivars.c:609: warning: initialization from".
problem introduced in commit
f6f8285132907757ef84ef8dae0a1244b8cde6ac
Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Linus Torvalds [Mon, 28 Nov 2011 21:55:59 +0000 (13:55 -0800)]
Merge branch 'for-3.2-fixes' of git://git./linux/kernel/git/tj/cgroup
* 'for-3.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup_freezer: fix freezing groups with stopped tasks
Linus Torvalds [Mon, 28 Nov 2011 21:49:43 +0000 (13:49 -0800)]
Merge branch 'for-3.2-fixes' of git://git./linux/kernel/git/tj/percpu
* 'for-3.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu: explain why per_cpu_ptr_to_phys() is more complicated than necessary
percpu: fix chunk range calculation
percpu: rename pcpu_mem_alloc to pcpu_mem_zalloc
Rafael J. Wysocki [Wed, 23 Nov 2011 20:20:32 +0000 (21:20 +0100)]
PM: Update comments describing device power management callbacks
The comments describing device power management callbacks in
include/pm.h are outdated and somewhat confusing, so make them
reflect the reality more accurately.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Rafael J. Wysocki [Wed, 23 Nov 2011 20:20:15 +0000 (21:20 +0100)]
PM / Sleep: Update documentation related to system wakeup
The system wakeup section of Documentation/power/devices.txt is
outdated, so make it agree with the current code.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Rafael J. Wysocki [Wed, 23 Nov 2011 20:20:07 +0000 (21:20 +0100)]
PM / Runtime: Make documentation follow the new behavior of irq_safe
The runtime PM core code behavior related to the power.irq_safe
device flag has changed recently and the documentation should be
modified to reflect it.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Rafael J. Wysocki [Wed, 23 Nov 2011 20:19:57 +0000 (21:19 +0100)]
PM / Sleep: Correct inaccurate information in devices.txt
The documentation file Documentation/power/devices.txt contains some
information that isn't correct any more due to code modifications
made after that file had been created (or updated last time). Fix
this.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>