From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: To: Paul Mackerras From: Benjamin Herrenschmidt Date: Wed, 07 Nov 2007 17:17:02 +1100 Subject: [PATCH] ppc64: Fix si_addr value on low level hash failures Message-Id: <20071107061732.8A5B4DDDFE@ozlabs.org> Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- 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