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powerpc: Add plain English description for alignment exception oopses 

If we take an alignment exception which we cannot fix, the oops
currently prints:

Unable to handle kernel paging request for unknown fault

Lets print something more useful:

Unable to handle kernel paging request for unaligned access at address 0xc0000000f77bba8f

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Anton Blanchard 2015-07-02 14:56:20 +10:00 committed by Michael Ellerman
parent 8c00d5c9d3
commit eab861a7a5
1 changed files with 4 additions and 0 deletions
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4
arch/powerpc/mm/fault.c
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@ -529,6 +529,10 @@ void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
printk(KERN_ALERT "Unable to handle kernel paging request for "
"instruction fetch\n");
break;
case 0x600:
printk(KERN_ALERT "Unable to handle kernel paging request for "
"unaligned access at address 0x%08lx\n", regs->dar);
break;
default:
printk(KERN_ALERT "Unable to handle kernel paging request for "
"unknown fault\n");