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authorRussell King <rmk+kernel@arm.linux.org.uk>2015-03-10 20:40:55 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2015-03-10 20:54:56 +0100
commit6d021b724481fbb908eb29384898deb9f00dfe70 (patch)
tree2d4ed5a2cc26980a99751b36fc70692603d04c5e /arch
parentARM: dma-api: fix off-by-one error in __dma_supported() (diff)
downloadlinux-6d021b724481fbb908eb29384898deb9f00dfe70.tar.xz
linux-6d021b724481fbb908eb29384898deb9f00dfe70.zip
ARM: dump pgd, pmd and pte states on unhandled data abort faults
It can be useful to dump the page table entries when an unhandled data abort fault occurs. This can aid debugging of these situations, for example, a STREX instruction causing an external abort on non-linefetch fault, as has been reported recently. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mm/fault.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index a982dc3190df..6333d9c17875 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -552,6 +552,7 @@ do_DataAbort(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
pr_alert("Unhandled fault: %s (0x%03x) at 0x%08lx\n",
inf->name, fsr, addr);
+ show_pte(current->mm, addr);
info.si_signo = inf->sig;
info.si_errno = 0;