From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Scott Wood <oss@buserror.net>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] powerpc/40x: Clear MSR_DR in one insn instead of two
Date: Fri, 5 Aug 2016 13:28:05 +0200 (CEST) [thread overview]
Message-ID: <20160805112806.5E6981A244A@localhost.localdomain> (raw)
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
arch/powerpc/kernel/misc_32.S | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index d9c912b..e025230 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -243,8 +243,7 @@ _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
@@ -261,8 +260,7 @@ _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
--
2.1.0
next reply other threads:[~2016-08-05 11:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-05 11:28 Christophe Leroy [this message]
2017-06-05 10:21 ` powerpc/40x: Clear MSR_DR in one insn instead of two Michael Ellerman
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