Commit 82087414 authored by Anton Blanchard's avatar Anton Blanchard Committed by Benjamin Herrenschmidt

powerpc: No need to preserve count register across system call

The count register is volatile so we don't need to preserve it.
Store zero to the entry in the exception frame.
Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 823df435
......@@ -83,6 +83,7 @@ system_call_common:
std r11,GPR11(r1)
std r11,GPR12(r1)
std r11,_XER(r1)
std r11,_CTR(r1)
std r9,GPR13(r1)
mfcr r9
mflr r10
......@@ -90,8 +91,6 @@ system_call_common:
std r9,_CCR(r1)
std r10,_LINK(r1)
std r11,_TRAP(r1)
mfctr r10
std r10,_CTR(r1)
std r3,ORIG_GPR3(r1)
ld r2,PACATOC(r13)
addi r9,r1,STACK_FRAME_OVERHEAD
......
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