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authorRalf Baechle <ralf@linux-mips.org>2009-04-30 02:16:19 +0200
committerRalf Baechle <ralf@linux-mips.org>2009-05-14 13:50:29 +0100
commit0b54352600b820a6d25f151cbd8975ed9b2aeb09 (patch)
treea98536daeb5afab2eda0c8ba31cf5ac4da2eebaa /arch
parent5c5dd1d29120affb127955277bfba9f60e27a3fe (diff)
downloadop-kernel-dev-0b54352600b820a6d25f151cbd8975ed9b2aeb09.zip
op-kernel-dev-0b54352600b820a6d25f151cbd8975ed9b2aeb09.tar.gz
MIPS: Fix sign-extension bug in 32-bit kernel on 32-bit hardware.
Probably nobody does arithmetic on cp0 register values so this has never bitten. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/include/asm/mipsregs.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 0ef30c8..32ef8be 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -728,8 +728,8 @@ do { \
".set\tmips64\n\t" \
"dmfc0\t%M0, " #source "\n\t" \
"dsll\t%L0, %M0, 32\n\t" \
- "dsrl\t%M0, %M0, 32\n\t" \
- "dsrl\t%L0, %L0, 32\n\t" \
+ "dsra\t%M0, %M0, 32\n\t" \
+ "dsra\t%L0, %L0, 32\n\t" \
".set\tmips0" \
: "=r" (__val)); \
else \
@@ -737,8 +737,8 @@ do { \
".set\tmips64\n\t" \
"dmfc0\t%M0, " #source ", " #sel "\n\t" \
"dsll\t%L0, %M0, 32\n\t" \
- "dsrl\t%M0, %M0, 32\n\t" \
- "dsrl\t%L0, %L0, 32\n\t" \
+ "dsra\t%M0, %M0, 32\n\t" \
+ "dsra\t%L0, %L0, 32\n\t" \
".set\tmips0" \
: "=r" (__val)); \
local_irq_restore(__flags); \
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