From: David Howells Date: Tue, 4 May 2010 12:42:53 +0000 (+0100) Subject: Fix the x86_64 implementation of call_rwsem_wait() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a66f6375bdeb64d7a56c532bda7c006358845820;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Signed-off-by: Linus Torvalds --- 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) 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