Messages in this thread Patch in this message | | | From | Christophe Leroy <> | Subject | [PATCH v4 19/21] powerpc/8xx: Don't restore regs to save them again. | Date | Fri, 19 Sep 2014 10:36:10 +0200 (CEST) |
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There is not need to restore r10, r11 and cr registers at this end of ITLBmiss handler as they are saved again to the same place in ITLBError handler we are jumping to.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
--- Changes in v2: - None
Changes in v3: - None
Changes in v4: - None
arch/powerpc/kernel/head_8xx.S | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index f372984..bcf0a43 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -383,8 +383,7 @@ InstructionTLBMiss: lwz r3, 8(r0) #endif mfspr r10, SPRN_SPRG_SCRATCH2 - EXCEPTION_EPILOG_0 - b InstructionTLBError + b InstructionTLBError1 . = 0x1200 DataStoreTLBMiss: @@ -473,7 +472,10 @@ DataStoreTLBMiss: */ . = 0x1300 InstructionTLBError: - EXCEPTION_PROLOG + EXCEPTION_PROLOG_0 +InstructionTLBError1: + EXCEPTION_PROLOG_1 + EXCEPTION_PROLOG_2 mr r4,r12 mr r5,r9 /* 0x400 is InstructionAccess exception, needed by bad_page_fault() */ -- 2.1.0
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