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* [PATCH v4 08/21] powerpc/8xx: No need to restore registers and save them again.
@ 2014-09-19  8:36 ` Christophe Leroy
  0 siblings, 0 replies; 2+ messages in thread
From: Christophe Leroy @ 2014-09-19  8:36 UTC (permalink / raw)
  To: Benjamin Herrenschmidt, Paul Mackerras
  Cc: scottwood, linuxppc-dev, linux-kernel

In DTLBError handler there is not need to restore r10, r11 and cr registers
after fixing DAR as they are saved again to the same place just after.

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 |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 5f04d5f..e5a250c 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -478,8 +478,8 @@ DataTLBError:
 	cmpwi	cr0, r11, 0x00f0
 	beq-	FixupDAR	/* must be a buggy dcbX, icbi insn. */
 DARFixed:/* Return from dcbx instruction bug workaround */
-	EXCEPTION_EPILOG_0
-	EXCEPTION_PROLOG
+	EXCEPTION_PROLOG_1
+	EXCEPTION_PROLOG_2
 	mfspr	r10,SPRN_DSISR
 	stw	r10,_DSISR(r11)
 	mr	r5,r10
-- 
1.7.1

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2014-09-19  8:36 [PATCH v4 08/21] powerpc/8xx: No need to restore registers and save them again Christophe Leroy
2014-09-19  8:36 ` Christophe Leroy

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