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ARM: dump pgd, pmd and pte states on unhandled data abort faults

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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>
This commit is contained in:
Russell King 2015-03-10 19:40:55 +00:00
parent 8bf1268f48
commit 6d021b7244
1 changed files with 1 additions and 0 deletions
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arch/arm/mm/fault.c
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@ -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;