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authorDavid Howells <dhowells@redhat.com>2010-05-04 13:42:53 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-04 15:24:14 -0700
commita66f6375bdeb64d7a56c532bda7c006358845820 (patch)
tree2d42106075f70f23d12485edfdc4aba537187dcb
parentc81406d6423416f1e18a8a41a3b7ac415fdf13d3 (diff)
downloadop-kernel-dev-a66f6375bdeb64d7a56c532bda7c006358845820.zip
op-kernel-dev-a66f6375bdeb64d7a56c532bda7c006358845820.tar.gz
Fix the x86_64 implementation of call_rwsem_wait()
The x86_64 call_rwsem_wait() treats the active state counter part of the R/W semaphore state as being 16-bit when it's actually 32-bit (it's half of the 64-bit state). It should do "decl %edx" not "decw %dx". Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/x86/lib/rwsem_64.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/lib/rwsem_64.S b/arch/x86/lib/rwsem_64.S
index 15acecf..41fcf00 100644
--- a/arch/x86/lib/rwsem_64.S
+++ b/arch/x86/lib/rwsem_64.S
@@ -60,7 +60,7 @@ ENTRY(call_rwsem_down_write_failed)
ENDPROC(call_rwsem_down_write_failed)
ENTRY(call_rwsem_wake)
- decw %dx /* do nothing if still outstanding active readers */
+ decl %edx /* do nothing if still outstanding active readers */
jnz 1f
save_common_regs
movq %rax,%rdi
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