If the low level MMU hash table insertion returns an error (which
can happen in some rare circumstances when the hypervisor refuses
the insertion of a PTE, typically if you try to access junk via
/dev/mem), the generated signal had an incorrect si_addr value due
to a bug in the assembly, which was loading it as a 32 bits quantity
instead of a 64 bits quantity.
Signed-off-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
---
arch/powerpc/kernel/head_64.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-work/arch/powerpc/kernel/head_64.S
===================================================================
--- linux-work.orig/arch/powerpc/kernel/head_64.S 2007-11-07
17:14:14.000000000 +1100
+++ linux-work/arch/powerpc/kernel/head_64.S 2007-11-07 17:14:16.000000000
+1100
@@ -936,7 +936,7 @@ handle_page_fault:
*/
12: bl .save_nvgprs
addi r3,r1,STACK_FRAME_OVERHEAD
- lwz r4,_DAR(r1)
+ ld r4,_DAR(r1)
bl .low_hash_fault
b .ret_from_except
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