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powerpc: Remove redundant mflr in _switch

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No need to execute mflr twice.

Signed-off-by: Anton Blanchard <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
This commit is contained in:
Anton Blanchard authored and Michael Ellerman committed 2015-12-01 13:52:24 +11:00
1 parent 152d523e63
commit 68bfa962bf
1 file changed
+1 -3
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arch/powerpc/kernel/entry_64.S
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@@ -452,9 +452,7 @@ _GLOBAL(_switch)
/* r3-r13 are caller saved -- Cort */
SAVE_8GPRS(14, r1)
SAVE_10GPRS(22, r1)
mflr r20 /* Return to switch caller */
std r20,_NIP(r1)
std r0,_NIP(r1) /* Return to switch caller */
mfcr r23
std r23,_CCR(r1)
std r1,KSP(r3) /* Set old stack pointer */