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authorDavid Howells <dhowells@redhat.com>2010-05-04 08:42:53 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-04 18:24:14 -0400
commita66f6375bdeb64d7a56c532bda7c006358845820 (patch)
tree2d42106075f70f23d12485edfdc4aba537187dcb /arch/x86/lib
parentc81406d6423416f1e18a8a41a3b7ac415fdf13d3 (diff)
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>
Diffstat (limited to 'arch/x86/lib')
-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 15acecf0d7aa..41fcf00e49df 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)
60 ENDPROC(call_rwsem_down_write_failed) 60 ENDPROC(call_rwsem_down_write_failed)
61 61
62ENTRY(call_rwsem_wake) 62ENTRY(call_rwsem_wake)
63 decw %dx /* do nothing if still outstanding active readers */ 63 decl %edx /* do nothing if still outstanding active readers */
64 jnz 1f 64 jnz 1f
65 save_common_regs 65 save_common_regs
66 movq %rax,%rdi 66 movq %rax,%rdi