ARM: 7319/1: Print debug info for SIGBUS in user faults

Print debug information on user faults for SIGBUS if user_debug = 16
in the kernel command line.

Reference: <1327333344-26340-1-git-send-email-javi.merino@arm.com>

Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index bb7eac3..40c43a9 100644 (file)
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -164,7 +164,8 @@ __do_user_fault(struct task_struct *tsk, unsigned long addr,
        struct siginfo si;
 
 #ifdef CONFIG_DEBUG_USER
-       if (user_debug & UDBG_SEGV) {
+       if (((user_debug & UDBG_SEGV) && (sig == SIGSEGV)) ||
+           ((user_debug & UDBG_BUS)  && (sig == SIGBUS))) {
                printk(KERN_DEBUG "%s: unhandled page fault (%d) at 0x%08lx, code 0x%03x\n",
                       tsk->comm, sig, addr, fsr);
                show_pte(tsk->mm, addr);