From c8f30ae54714abf494d79826d90b5e4844fbf355 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Thu, 18 Oct 2007 03:06:52 -0700 Subject: [PATCH] mips: fix bitops Documentation/atomic_ops.txt defines these primitives must contain a memory barrier both before and after their memory operation. This is consistent with the atomic ops implementation on mips. Signed-off-by: Nick Piggin Cc: Ralf Baechle Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-mips/bitops.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/asm-mips/bitops.h b/include/asm-mips/bitops.h index 0d3373f64920..5478d947e289 100644 --- a/include/asm-mips/bitops.h +++ b/include/asm-mips/bitops.h @@ -240,6 +240,8 @@ static inline int test_and_set_bit(unsigned long nr, unsigned short bit = nr & SZLONG_MASK; unsigned long res; + smp_llsc_mb(); + if (cpu_has_llsc && R10000_LLSC_WAR) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); unsigned long temp; @@ -308,6 +310,8 @@ static inline int test_and_clear_bit(unsigned long nr, unsigned short bit = nr & SZLONG_MASK; unsigned long res; + smp_llsc_mb(); + if (cpu_has_llsc && R10000_LLSC_WAR) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); unsigned long temp; @@ -396,6 +400,8 @@ static inline int test_and_change_bit(unsigned long nr, unsigned short bit = nr & SZLONG_MASK; unsigned long res; + smp_llsc_mb(); + if (cpu_has_llsc && R10000_LLSC_WAR) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); unsigned long temp; -- 2.20.1