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>
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@ -60,7 +60,7 @@ ENTRY(call_rwsem_down_write_failed)
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ENDPROC(call_rwsem_down_write_failed)
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ENDPROC(call_rwsem_down_write_failed)
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ENTRY(call_rwsem_wake)
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ENTRY(call_rwsem_wake)
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decw %dx /* do nothing if still outstanding active readers */
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decl %edx /* do nothing if still outstanding active readers */
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jnz 1f
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jnz 1f
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save_common_regs
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save_common_regs
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movq %rax,%rdi
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movq %rax,%rdi
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