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[POWERPC] Fix si_addr value on low level hash failures

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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 <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2007-11-07 17:17:02 +11:00 committed by Paul Mackerras
parent 7e22fa4a1d
commit a792e75d9b
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kernel/head_64.S
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@ -904,7 +904,7 @@ 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