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powerpc/40x: Clear MSR_DR in one insn instead of two
author
Christophe Leroy
<christophe.leroy@c-s.fr>
Fri, 5 Aug 2016 11:28:05 +0000
(13:28 +0200)
committer
Michael Ellerman
<mpe@ellerman.id.au>
Fri, 2 Jun 2017 09:20:43 +0000
(19:20 +1000)
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kernel/misc_32.S
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diff --git
a/arch/powerpc/kernel/misc_32.S
b/arch/powerpc/kernel/misc_32.S
index
84db14e
..
3f7a9a2
100644
(file)
--- a/
arch/powerpc/kernel/misc_32.S
+++ b/
arch/powerpc/kernel/misc_32.S
@@
-244,8
+244,7
@@
_GLOBAL(_nmask_and_or_msr)
*/
_GLOBAL(real_readb)
mfmsr r7
- ori r0,r7,MSR_DR
- xori r0,r0,MSR_DR
+ rlwinm r0,r7,0,~MSR_DR
sync
mtmsr r0
sync
@@
-262,8
+261,7
@@
_GLOBAL(real_readb)
*/
_GLOBAL(real_writeb)
mfmsr r7
- ori r0,r7,MSR_DR
- xori r0,r0,MSR_DR
+ rlwinm r0,r7,0,~MSR_DR
sync
mtmsr r0
sync