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powerpc/fixmap: don't clear fixmap area in paging_init()
author
Christophe Leroy
<christophe.leroy@c-s.fr>
Thu, 12 Sep 2019 13:49:41 +0000
(13:49 +0000)
committer
Michael Ellerman
<mpe@ellerman.id.au>
Mon, 25 Nov 2019 10:45:43 +0000
(21:45 +1100)
fixmap is intended to map things permanently like the IMMR region on
FSL SOC (8xx, 83xx, ...), so don't clear it when initialising paging()
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link:
https://lore.kernel.org/r/41c99bc06394a6bc2888631cb98a3ed2ae281ddb.1568295907.git.christophe.leroy@c-s.fr
arch/powerpc/mm/mem.c
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diff --git
a/arch/powerpc/mm/mem.c
b/arch/powerpc/mm/mem.c
index
7573002
..
bf0c54b
100644
(file)
--- a/
arch/powerpc/mm/mem.c
+++ b/
arch/powerpc/mm/mem.c
@@
-237,14
+237,6
@@
void __init paging_init(void)
unsigned long long total_ram = memblock_phys_mem_size();
phys_addr_t top_of_ram = memblock_end_of_DRAM();
-#ifdef CONFIG_PPC32
- unsigned long v = __fix_to_virt(__end_of_fixed_addresses - 1);
- unsigned long end = __fix_to_virt(FIX_HOLE);
-
- for (; v < end; v += PAGE_SIZE)
- map_kernel_page(v, 0, __pgprot(0)); /* XXX gross */
-#endif
-
#ifdef CONFIG_HIGHMEM
map_kernel_page(PKMAP_BASE, 0, __pgprot(0)); /* XXX gross */
pkmap_page_table = virt_to_kpte(PKMAP_BASE);