* [PATCH] powerpc: Add plain English description for alignment exception oopses
@ 2015-07-02 4:56 Anton Blanchard
2015-07-07 10:38 ` Michael Ellerman
0 siblings, 1 reply; 2+ messages in thread
From: Anton Blanchard @ 2015-07-02 4:56 UTC (permalink / raw)
To: benh, paulus, mpe; +Cc: linuxppc-dev
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>
---
arch/powerpc/mm/fault.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index b396868..661ba0a 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -528,6 +528,10 @@ 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");
--
2.1.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: powerpc: Add plain English description for alignment exception oopses
2015-07-02 4:56 [PATCH] powerpc: Add plain English description for alignment exception oopses Anton Blanchard
@ 2015-07-07 10:38 ` Michael Ellerman
0 siblings, 0 replies; 2+ messages in thread
From: Michael Ellerman @ 2015-07-07 10:38 UTC (permalink / raw)
To: Anton Blanchard, benh, paulus; +Cc: linuxppc-dev
On Thu, 2015-02-07 at 04:56:20 UTC, Anton Blanchard wrote:
> 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>
Applied to powerpc fixes, thanks.
https://git.kernel.org/cgit/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=eab861a7a52208868637f47a92caa926ddadd9c7
cheers
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