* [PATCH v3 08/21] powerpc/8xx: No need to restore registers and save them again.
@ 2014-09-17 16:36 Christophe Leroy
0 siblings, 0 replies; only message in thread
From: Christophe Leroy @ 2014-09-17 16:36 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
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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