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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-03 12:57:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-03 12:57:53 -0700
commit776edb59317ada867dfcddde40b55648beeb0078 (patch)
treef6a6136374642323cfefd7d6399ea429f9018ade /arch
parent59a3d4c3631e553357b7305dc09db1990aa6757c (diff)
parent3cf2f34e1a3d4d5ff209d087925cf950e52f4805 (diff)
downloadlinux-776edb59317ada867dfcddde40b55648beeb0078.tar.bz2
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
Pull core locking updates from Ingo Molnar: "The main changes in this cycle were: - reduced/streamlined smp_mb__*() interface that allows more usecases and makes the existing ones less buggy, especially in rarer architectures - add rwsem implementation comments - bump up lockdep limits" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits) rwsem: Add comments to explain the meaning of the rwsem's count field lockdep: Increase static allocations arch: Mass conversion of smp_mb__*() arch,doc: Convert smp_mb__*() arch,xtensa: Convert smp_mb__*() arch,x86: Convert smp_mb__*() arch,tile: Convert smp_mb__*() arch,sparc: Convert smp_mb__*() arch,sh: Convert smp_mb__*() arch,score: Convert smp_mb__*() arch,s390: Convert smp_mb__*() arch,powerpc: Convert smp_mb__*() arch,parisc: Convert smp_mb__*() arch,openrisc: Convert smp_mb__*() arch,mn10300: Convert smp_mb__*() arch,mips: Convert smp_mb__*() arch,metag: Convert smp_mb__*() arch,m68k: Convert smp_mb__*() arch,m32r: Convert smp_mb__*() arch,ia64: Convert smp_mb__*() ...
Diffstat (limited to 'arch')
-rw-r--r--arch/alpha/include/asm/atomic.h5
-rw-r--r--arch/alpha/include/asm/bitops.h3
-rw-r--r--arch/arc/include/asm/atomic.h5
-rw-r--r--arch/arc/include/asm/bitops.h5
-rw-r--r--arch/arm/include/asm/atomic.h5
-rw-r--r--arch/arm/include/asm/barrier.h3
-rw-r--r--arch/arm/include/asm/bitops.h4
-rw-r--r--arch/arm64/include/asm/atomic.h5
-rw-r--r--arch/arm64/include/asm/barrier.h3
-rw-r--r--arch/arm64/include/asm/bitops.h9
-rw-r--r--arch/avr32/include/asm/atomic.h5
-rw-r--r--arch/avr32/include/asm/bitops.h9
-rw-r--r--arch/blackfin/include/asm/barrier.h3
-rw-r--r--arch/blackfin/include/asm/bitops.h14
-rw-r--r--arch/c6x/include/asm/bitops.h8
-rw-r--r--arch/cris/include/asm/atomic.h8
-rw-r--r--arch/cris/include/asm/bitops.h9
-rw-r--r--arch/frv/include/asm/atomic.h7
-rw-r--r--arch/frv/include/asm/bitops.h6
-rw-r--r--arch/hexagon/include/asm/atomic.h6
-rw-r--r--arch/hexagon/include/asm/bitops.h4
-rw-r--r--arch/ia64/include/asm/atomic.h7
-rw-r--r--arch/ia64/include/asm/barrier.h3
-rw-r--r--arch/ia64/include/asm/bitops.h9
-rw-r--r--arch/ia64/include/uapi/asm/cmpxchg.h9
-rw-r--r--arch/m32r/include/asm/atomic.h7
-rw-r--r--arch/m32r/include/asm/bitops.h6
-rw-r--r--arch/m68k/include/asm/atomic.h8
-rw-r--r--arch/m68k/include/asm/bitops.h7
-rw-r--r--arch/metag/include/asm/atomic.h6
-rw-r--r--arch/metag/include/asm/barrier.h3
-rw-r--r--arch/metag/include/asm/bitops.h6
-rw-r--r--arch/mips/include/asm/atomic.h9
-rw-r--r--arch/mips/include/asm/barrier.h3
-rw-r--r--arch/mips/include/asm/bitops.h11
-rw-r--r--arch/mips/kernel/irq.c4
-rw-r--r--arch/mn10300/include/asm/atomic.h7
-rw-r--r--arch/mn10300/include/asm/bitops.h4
-rw-r--r--arch/mn10300/mm/tlb-smp.c4
-rw-r--r--arch/openrisc/include/asm/bitops.h9
-rw-r--r--arch/parisc/include/asm/atomic.h6
-rw-r--r--arch/parisc/include/asm/bitops.h4
-rw-r--r--arch/powerpc/include/asm/atomic.h6
-rw-r--r--arch/powerpc/include/asm/barrier.h3
-rw-r--r--arch/powerpc/include/asm/bitops.h6
-rw-r--r--arch/powerpc/kernel/crash.c2
-rw-r--r--arch/s390/include/asm/atomic.h5
-rw-r--r--arch/s390/include/asm/barrier.h5
-rw-r--r--arch/score/include/asm/bitops.h7
-rw-r--r--arch/sh/include/asm/atomic.h6
-rw-r--r--arch/sh/include/asm/bitops.h7
-rw-r--r--arch/sparc/include/asm/atomic_32.h7
-rw-r--r--arch/sparc/include/asm/atomic_64.h7
-rw-r--r--arch/sparc/include/asm/barrier_64.h3
-rw-r--r--arch/sparc/include/asm/bitops_32.h3
-rw-r--r--arch/sparc/include/asm/bitops_64.h4
-rw-r--r--arch/tile/include/asm/atomic_32.h10
-rw-r--r--arch/tile/include/asm/atomic_64.h6
-rw-r--r--arch/tile/include/asm/barrier.h14
-rw-r--r--arch/tile/include/asm/bitops.h1
-rw-r--r--arch/tile/include/asm/bitops_32.h8
-rw-r--r--arch/tile/include/asm/bitops_64.h4
-rw-r--r--arch/x86/include/asm/atomic.h7
-rw-r--r--arch/x86/include/asm/barrier.h4
-rw-r--r--arch/x86/include/asm/bitops.h6
-rw-r--r--arch/x86/include/asm/sync_bitops.h2
-rw-r--r--arch/x86/kernel/apic/hw_nmi.c2
-rw-r--r--arch/xtensa/include/asm/atomic.h7
-rw-r--r--arch/xtensa/include/asm/barrier.h3
-rw-r--r--arch/xtensa/include/asm/bitops.h4
70 files changed, 110 insertions, 297 deletions
diff --git a/arch/alpha/include/asm/atomic.h b/arch/alpha/include/asm/atomic.h
index 78b03ef39f6f..ed60a1ee1ed3 100644
--- a/arch/alpha/include/asm/atomic.h
+++ b/arch/alpha/include/asm/atomic.h
@@ -292,9 +292,4 @@ static inline long atomic64_dec_if_positive(atomic64_t *v)
#define atomic_dec(v) atomic_sub(1,(v))
#define atomic64_dec(v) atomic64_sub(1,(v))
-#define smp_mb__before_atomic_dec() smp_mb()
-#define smp_mb__after_atomic_dec() smp_mb()
-#define smp_mb__before_atomic_inc() smp_mb()
-#define smp_mb__after_atomic_inc() smp_mb()
-
#endif /* _ALPHA_ATOMIC_H */
diff --git a/arch/alpha/include/asm/bitops.h b/arch/alpha/include/asm/bitops.h
index a19ba5efea4c..4bdfbd444e63 100644
--- a/arch/alpha/include/asm/bitops.h
+++ b/arch/alpha/include/asm/bitops.h
@@ -53,9 +53,6 @@ __set_bit(unsigned long nr, volatile void * addr)
*m |= 1 << (nr & 31);
}
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
-
static inline void
clear_bit(unsigned long nr, volatile void * addr)
{
diff --git a/arch/arc/include/asm/atomic.h b/arch/arc/include/asm/atomic.h
index 03e494f695d1..83f03ca6caf6 100644
--- a/arch/arc/include/asm/atomic.h
+++ b/arch/arc/include/asm/atomic.h
@@ -190,11 +190,6 @@ static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
#endif /* !CONFIG_ARC_HAS_LLSC */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
/**
* __atomic_add_unless - add unless the number is a given value
* @v: pointer of type atomic_t
diff --git a/arch/arc/include/asm/bitops.h b/arch/arc/include/asm/bitops.h
index 647a83a8e756..ebc0cf3164dc 100644
--- a/arch/arc/include/asm/bitops.h
+++ b/arch/arc/include/asm/bitops.h
@@ -19,6 +19,7 @@
#include <linux/types.h>
#include <linux/compiler.h>
+#include <asm/barrier.h>
/*
* Hardware assisted read-modify-write using ARC700 LLOCK/SCOND insns.
@@ -496,10 +497,6 @@ static inline __attribute__ ((const)) int __ffs(unsigned long word)
*/
#define ffz(x) __ffs(~(x))
-/* TODO does this affect uni-processor code */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/sched.h>
diff --git a/arch/arm/include/asm/atomic.h b/arch/arm/include/asm/atomic.h
index 9a92fd7864a8..3040359094d9 100644
--- a/arch/arm/include/asm/atomic.h
+++ b/arch/arm/include/asm/atomic.h
@@ -241,11 +241,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
#define atomic_add_negative(i,v) (atomic_add_return(i, v) < 0)
-#define smp_mb__before_atomic_dec() smp_mb()
-#define smp_mb__after_atomic_dec() smp_mb()
-#define smp_mb__before_atomic_inc() smp_mb()
-#define smp_mb__after_atomic_inc() smp_mb()
-
#ifndef CONFIG_GENERIC_ATOMIC64
typedef struct {
long long counter;
diff --git a/arch/arm/include/asm/barrier.h b/arch/arm/include/asm/barrier.h
index 2f59f7443396..c6a3e73a6e24 100644
--- a/arch/arm/include/asm/barrier.h
+++ b/arch/arm/include/asm/barrier.h
@@ -79,5 +79,8 @@ do { \
#define set_mb(var, value) do { var = value; smp_mb(); } while (0)
+#define smp_mb__before_atomic() smp_mb()
+#define smp_mb__after_atomic() smp_mb()
+
#endif /* !__ASSEMBLY__ */
#endif /* __ASM_BARRIER_H */
diff --git a/arch/arm/include/asm/bitops.h b/arch/arm/include/asm/bitops.h
index b2e298a90d76..56380995f4c3 100644
--- a/arch/arm/include/asm/bitops.h
+++ b/arch/arm/include/asm/bitops.h
@@ -25,9 +25,7 @@
#include <linux/compiler.h>
#include <linux/irqflags.h>
-
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
+#include <asm/barrier.h>
/*
* These functions are the basis of our bit ops.
diff --git a/arch/arm64/include/asm/atomic.h b/arch/arm64/include/asm/atomic.h
index 0237f0867e37..57e8cb49824c 100644
--- a/arch/arm64/include/asm/atomic.h
+++ b/arch/arm64/include/asm/atomic.h
@@ -152,11 +152,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
#define atomic_add_negative(i,v) (atomic_add_return(i, v) < 0)
-#define smp_mb__before_atomic_dec() smp_mb()
-#define smp_mb__after_atomic_dec() smp_mb()
-#define smp_mb__before_atomic_inc() smp_mb()
-#define smp_mb__after_atomic_inc() smp_mb()
-
/*
* 64-bit atomic operations.
*/
diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h
index 66eb7648043b..48b9e704af7c 100644
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -98,6 +98,9 @@ do { \
#define set_mb(var, value) do { var = value; smp_mb(); } while (0)
#define nop() asm volatile("nop");
+#define smp_mb__before_atomic() smp_mb()
+#define smp_mb__after_atomic() smp_mb()
+
#endif /* __ASSEMBLY__ */
#endif /* __ASM_BARRIER_H */
diff --git a/arch/arm64/include/asm/bitops.h b/arch/arm64/include/asm/bitops.h
index aa5b59d6ba43..9c19594ce7cb 100644
--- a/arch/arm64/include/asm/bitops.h
+++ b/arch/arm64/include/asm/bitops.h
@@ -17,17 +17,8 @@
#define __ASM_BITOPS_H
#include <linux/compiler.h>
-
#include <asm/barrier.h>
-/*
- * clear_bit may not imply a memory barrier
- */
-#ifndef smp_mb__before_clear_bit
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
-#endif
-
#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
#endif
diff --git a/arch/avr32/include/asm/atomic.h b/arch/avr32/include/asm/atomic.h
index 61407279208a..0780f3f2415b 100644
--- a/arch/avr32/include/asm/atomic.h
+++ b/arch/avr32/include/asm/atomic.h
@@ -183,9 +183,4 @@ static inline int atomic_sub_if_positive(int i, atomic_t *v)
#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif /* __ASM_AVR32_ATOMIC_H */
diff --git a/arch/avr32/include/asm/bitops.h b/arch/avr32/include/asm/bitops.h
index ebe7ad3f490b..910d5374ce59 100644
--- a/arch/avr32/include/asm/bitops.h
+++ b/arch/avr32/include/asm/bitops.h
@@ -13,12 +13,7 @@
#endif
#include <asm/byteorder.h>
-
-/*
- * clear_bit() doesn't provide any barrier for the compiler
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
+#include <asm/barrier.h>
/*
* set_bit - Atomically set a bit in memory
@@ -67,7 +62,7 @@ static inline void set_bit(int nr, volatile void * addr)
*
* clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
- * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/
static inline void clear_bit(int nr, volatile void * addr)
diff --git a/arch/blackfin/include/asm/barrier.h b/arch/blackfin/include/asm/barrier.h
index 19283a16ac08..420006877998 100644
--- a/arch/blackfin/include/asm/barrier.h
+++ b/arch/blackfin/include/asm/barrier.h
@@ -27,6 +27,9 @@
#endif /* !CONFIG_SMP */
+#define smp_mb__before_atomic() barrier()
+#define smp_mb__after_atomic() barrier()
+
#include <asm-generic/barrier.h>
#endif /* _BLACKFIN_BARRIER_H */
diff --git a/arch/blackfin/include/asm/bitops.h b/arch/blackfin/include/asm/bitops.h
index 0ca40dd44724..b298b654a26f 100644
--- a/arch/blackfin/include/asm/bitops.h
+++ b/arch/blackfin/include/asm/bitops.h
@@ -27,21 +27,17 @@
#include <asm-generic/bitops/ext2-atomic.h>
+#include <asm/barrier.h>
+
#ifndef CONFIG_SMP
#include <linux/irqflags.h>
-
/*
* clear_bit may not imply a memory barrier
*/
-#ifndef smp_mb__before_clear_bit
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
-#endif
#include <asm-generic/bitops/atomic.h>
#include <asm-generic/bitops/non-atomic.h>
#else
-#include <asm/barrier.h>
#include <asm/byteorder.h> /* swab32 */
#include <linux/linkage.h>
@@ -101,12 +97,6 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
return __raw_bit_test_toggle_asm(a, nr & 0x1f);
}
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
#define test_bit __skip_test_bit
#include <asm-generic/bitops/non-atomic.h>
#undef test_bit
diff --git a/arch/c6x/include/asm/bitops.h b/arch/c6x/include/asm/bitops.h
index 0bec7e5036a8..f0ab012401b6 100644
--- a/arch/c6x/include/asm/bitops.h
+++ b/arch/c6x/include/asm/bitops.h
@@ -14,14 +14,8 @@
#ifdef __KERNEL__
#include <linux/bitops.h>
-
#include <asm/byteorder.h>
-
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
+#include <asm/barrier.h>
/*
* We are lucky, DSP is perfect for bitops: do it in 3 cycles
diff --git a/arch/cris/include/asm/atomic.h b/arch/cris/include/asm/atomic.h
index 1056a5dfe04f..aa429baebaf9 100644
--- a/arch/cris/include/asm/atomic.h
+++ b/arch/cris/include/asm/atomic.h
@@ -7,6 +7,8 @@
#include <linux/types.h>
#include <asm/cmpxchg.h>
#include <arch/atomic.h>
+#include <arch/system.h>
+#include <asm/barrier.h>
/*
* Atomic operations that C can't guarantee us. Useful for
@@ -151,10 +153,4 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
return ret;
}
-/* Atomic operations are already serializing */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif
diff --git a/arch/cris/include/asm/bitops.h b/arch/cris/include/asm/bitops.h
index 053c17b36559..bd49a546f4f5 100644
--- a/arch/cris/include/asm/bitops.h
+++ b/arch/cris/include/asm/bitops.h
@@ -21,6 +21,7 @@
#include <arch/bitops.h>
#include <linux/atomic.h>
#include <linux/compiler.h>
+#include <asm/barrier.h>
/*
* set_bit - Atomically set a bit in memory
@@ -42,7 +43,7 @@
*
* clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
- * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/
@@ -84,12 +85,6 @@ static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
return retval;
}
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
/**
* test_and_clear_bit - Clear a bit and return its old value
* @nr: Bit to clear
diff --git a/arch/frv/include/asm/atomic.h b/arch/frv/include/asm/atomic.h
index b86329d0e316..f6c3a1690101 100644
--- a/arch/frv/include/asm/atomic.h
+++ b/arch/frv/include/asm/atomic.h
@@ -17,6 +17,7 @@
#include <linux/types.h>
#include <asm/spr-regs.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
#ifdef CONFIG_SMP
#error not SMP safe
@@ -29,12 +30,6 @@
* We do not have SMP systems, so we don't have to deal with that.
*/
-/* Atomic operations are already serializing */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) (*(volatile int *)&(v)->counter)
#define atomic_set(v, i) (((v)->counter) = (i))
diff --git a/arch/frv/include/asm/bitops.h b/arch/frv/include/asm/bitops.h
index 57bf85db893f..96de220ef131 100644
--- a/arch/frv/include/asm/bitops.h
+++ b/arch/frv/include/asm/bitops.h
@@ -25,12 +25,6 @@
#include <asm-generic/bitops/ffz.h>
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
#ifndef CONFIG_FRV_OUTOFLINE_ATOMIC_OPS
static inline
unsigned long atomic_test_and_ANDNOT_mask(unsigned long mask, volatile unsigned long *v)
diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h
index 17dc63780c06..de916b11bff5 100644
--- a/arch/hexagon/include/asm/atomic.h
+++ b/arch/hexagon/include/asm/atomic.h
@@ -24,6 +24,7 @@
#include <linux/types.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
#define ATOMIC_INIT(i) { (i) }
@@ -176,9 +177,4 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
#define atomic_inc_return(v) (atomic_add_return(1, v))
#define atomic_dec_return(v) (atomic_sub_return(1, v))
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif
diff --git a/arch/hexagon/include/asm/bitops.h b/arch/hexagon/include/asm/bitops.h
index 9b1e4afbab3c..5e4a59b3ec1b 100644
--- a/arch/hexagon/include/asm/bitops.h
+++ b/arch/hexagon/include/asm/bitops.h
@@ -25,12 +25,10 @@
#include <linux/compiler.h>
#include <asm/byteorder.h>
#include <asm/atomic.h>
+#include <asm/barrier.h>
#ifdef __KERNEL__
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
/*
* The offset calculations for these are based on BITS_PER_LONG == 32
* (i.e. I get to shift by #5-2 (32 bits per long, 4 bytes per access),
diff --git a/arch/ia64/include/asm/atomic.h b/arch/ia64/include/asm/atomic.h
index 6e6fe1839f5d..0f8bf48dadf3 100644
--- a/arch/ia64/include/asm/atomic.h
+++ b/arch/ia64/include/asm/atomic.h
@@ -15,6 +15,7 @@
#include <linux/types.h>
#include <asm/intrinsics.h>
+#include <asm/barrier.h>
#define ATOMIC_INIT(i) { (i) }
@@ -208,10 +209,4 @@ atomic64_add_negative (__s64 i, atomic64_t *v)
#define atomic64_inc(v) atomic64_add(1, (v))
#define atomic64_dec(v) atomic64_sub(1, (v))
-/* Atomic operations are already serializing */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif /* _ASM_IA64_ATOMIC_H */
diff --git a/arch/ia64/include/asm/barrier.h b/arch/ia64/include/asm/barrier.h
index d0a69aa35e27..a48957c7b445 100644
--- a/arch/ia64/include/asm/barrier.h
+++ b/arch/ia64/include/asm/barrier.h
@@ -55,6 +55,9 @@
#endif
+#define smp_mb__before_atomic() barrier()
+#define smp_mb__after_atomic() barrier()
+
/*
* IA64 GCC turns volatile stores into st.rel and volatile loads into ld.acq no
* need for asm trickery!
diff --git a/arch/ia64/include/asm/bitops.h b/arch/ia64/include/asm/bitops.h
index c27eccd33349..71e8145243ee 100644
--- a/arch/ia64/include/asm/bitops.h
+++ b/arch/ia64/include/asm/bitops.h
@@ -16,6 +16,7 @@
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/intrinsics.h>
+#include <asm/barrier.h>
/**
* set_bit - Atomically set a bit in memory
@@ -65,12 +66,6 @@ __set_bit (int nr, volatile void *addr)
*((__u32 *) addr + (nr >> 5)) |= (1 << (nr & 31));
}
-/*
- * clear_bit() has "acquire" semantics.
- */
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() do { /* skip */; } while (0)
-
/**
* clear_bit - Clears a bit in memory
* @nr: Bit to clear
@@ -78,7 +73,7 @@ __set_bit (int nr, volatile void *addr)
*
* clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
- * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/
static __inline__ void
diff --git a/arch/ia64/include/uapi/asm/cmpxchg.h b/arch/ia64/include/uapi/asm/cmpxchg.h
index 4f37dbbb8640..f35109b1d907 100644
--- a/arch/ia64/include/uapi/asm/cmpxchg.h
+++ b/arch/ia64/include/uapi/asm/cmpxchg.h
@@ -118,6 +118,15 @@ extern long ia64_cmpxchg_called_with_bad_pointer(void);
#define cmpxchg_rel(ptr, o, n) \
ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr)))
+/*
+ * Worse still - early processor implementations actually just ignored
+ * the acquire/release and did a full fence all the time. Unfortunately
+ * this meant a lot of badly written code that used .acq when they really
+ * wanted .rel became legacy out in the wild - so when we made a cpu
+ * that strictly did the .acq or .rel ... all that code started breaking - so
+ * we had to back-pedal and keep the "legacy" behavior of a full fence :-(
+ */
+
/* for compatibility with other platforms: */
#define cmpxchg(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
#define cmpxchg64(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
diff --git a/arch/m32r/include/asm/atomic.h b/arch/m32r/include/asm/atomic.h
index 0d81697c326c..8ad0ed4182a5 100644
--- a/arch/m32r/include/asm/atomic.h
+++ b/arch/m32r/include/asm/atomic.h
@@ -13,6 +13,7 @@
#include <asm/assembler.h>
#include <asm/cmpxchg.h>
#include <asm/dcache_clear.h>
+#include <asm/barrier.h>
/*
* Atomic operations that C can't guarantee us. Useful for
@@ -308,10 +309,4 @@ static __inline__ void atomic_set_mask(unsigned long mask, atomic_t *addr)
local_irq_restore(flags);
}
-/* Atomic operations are already serializing on m32r */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif /* _ASM_M32R_ATOMIC_H */
diff --git a/arch/m32r/include/asm/bitops.h b/arch/m32r/include/asm/bitops.h
index d3dea9ac7d4e..86ba2b42a6cf 100644
--- a/arch/m32r/include/asm/bitops.h
+++ b/arch/m32r/include/asm/bitops.h
@@ -21,6 +21,7 @@
#include <asm/byteorder.h>
#include <asm/dcache_clear.h>
#include <asm/types.h>
+#include <asm/barrier.h>
/*
* These have to be done with inline assembly: that way the bit-setting
@@ -73,7 +74,7 @@ static __inline__ void set_bit(int nr, volatile void * addr)
*
* clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
- * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/
static __inline__ void clear_bit(int nr, volatile void * addr)
@@ -103,9 +104,6 @@ static __inline__ void clear_bit(int nr, volatile void * addr)
local_irq_restore(flags);
}
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
/**
* change_bit - Toggle a bit in memory
* @nr: Bit to clear
diff --git a/arch/m68k/include/asm/atomic.h b/arch/m68k/include/asm/atomic.h
index f4e32de263a7..55695212a2ae 100644
--- a/arch/m68k/include/asm/atomic.h
+++ b/arch/m68k/include/asm/atomic.h
@@ -4,6 +4,7 @@
#include <linux/types.h>
#include <linux/irqflags.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
/*
* Atomic operations that C can't guarantee us. Useful for
@@ -209,11 +210,4 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
return c;
}
-
-/* Atomic operations are already serializing */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif /* __ARCH_M68K_ATOMIC __ */
diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h
index c6baa913592a..b4a9b0d5928d 100644
--- a/arch/m68k/include/asm/bitops.h
+++ b/arch/m68k/include/asm/bitops.h
@@ -13,6 +13,7 @@
#endif
#include <linux/compiler.h>
+#include <asm/barrier.h>
/*
* Bit access functions vary across the ColdFire and 68k families.
@@ -67,12 +68,6 @@ static inline void bfset_mem_set_bit(int nr, volatile unsigned long *vaddr)
#define __set_bit(nr, vaddr) set_bit(nr, vaddr)
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
static inline void bclr_reg_clear_bit(int nr, volatile unsigned long *vaddr)
{
char *p = (char *)vaddr + (nr ^ 31) / 8;
diff --git a/arch/metag/include/asm/atomic.h b/arch/metag/include/asm/atomic.h
index 307ecd2bd9a1..470e365f04ea 100644
--- a/arch/metag/include/asm/atomic.h
+++ b/arch/metag/include/asm/atomic.h
@@ -4,6 +4,7 @@
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
#if defined(CONFIG_METAG_ATOMICITY_IRQSOFF)
/* The simple UP case. */
@@ -39,11 +40,6 @@
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif
#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)
diff --git a/arch/metag/include/asm/barrier.h b/arch/metag/include/asm/barrier.h
index 2d6f0de77325..c7591e80067c 100644
--- a/arch/metag/include/asm/barrier.h
+++ b/arch/metag/include/asm/barrier.h
@@ -100,4 +100,7 @@ do { \
___p1; \
})
+#define smp_mb__before_atomic() barrier()
+#define smp_mb__after_atomic() barrier()
+
#endif /* _ASM_METAG_BARRIER_H */
diff --git a/arch/metag/include/asm/bitops.h b/arch/metag/include/asm/bitops.h
index c0d0df0d1378..2671134ee745 100644
--- a/arch/metag/include/asm/bitops.h
+++ b/arch/metag/include/asm/bitops.h
@@ -5,12 +5,6 @@
#include <asm/barrier.h>
#include <asm/global_lock.h>
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
#ifdef CONFIG_SMP
/*
* These functions are the basis of our bit ops.
diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h
index e8eb3d53a241..37b2befe651a 100644
--- a/arch/mips/include/asm/atomic.h
+++ b/arch/mips/include/asm/atomic.h
@@ -761,13 +761,4 @@ static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
#endif /* CONFIG_64BIT */
-/*
- * atomic*_return operations are serializing but not the non-*_return
- * versions.
- */
-#define smp_mb__before_atomic_dec() smp_mb__before_llsc()
-#define smp_mb__after_atomic_dec() smp_llsc_mb()
-#define smp_mb__before_atomic_inc() smp_mb__before_llsc()
-#define smp_mb__after_atomic_inc() smp_llsc_mb()
-
#endif /* _ASM_ATOMIC_H */
diff --git a/arch/mips/include/asm/barrier.h b/arch/mips/include/asm/barrier.h
index e1aa4e4c2984..d0101dd0575e 100644
--- a/arch/mips/include/asm/barrier.h
+++ b/arch/mips/include/asm/barrier.h
@@ -195,4 +195,7 @@ do { \
___p1; \
})
+#define smp_mb__before_atomic() smp_mb__before_llsc()
+#define smp_mb__after_atomic() smp_llsc_mb()
+
#endif /* __ASM_BARRIER_H */
diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h
index 6a65d49e2c0d..7c8816f7b7c4 100644
--- a/arch/mips/include/asm/bitops.h
+++ b/arch/mips/include/asm/bitops.h
@@ -38,13 +38,6 @@
#endif
/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() smp_mb__before_llsc()
-#define smp_mb__after_clear_bit() smp_llsc_mb()
-
-
-/*
* These are the "slower" versions of the functions and are in bitops.c.
* These functions call raw_local_irq_{save,restore}().
*/
@@ -120,7 +113,7 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
*
* clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
- * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/
static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
@@ -175,7 +168,7 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
*/
static inline void clear_bit_unlock(unsigned long nr, volatile unsigned long *addr)
{
- smp_mb__before_clear_bit();
+ smp_mb__before_atomic();
clear_bit(nr, addr);
}
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index d1fea7a054be..1818da4dbb85 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -62,9 +62,9 @@ void __init alloc_legacy_irqno(void)
void free_irqno(unsigned int irq)
{
- smp_mb__before_clear_bit();
+ smp_mb__before_atomic();
clear_bit(irq, irq_map);
- smp_mb__after_clear_bit();
+ smp_mb__after_atomic();
}
/*
diff --git a/arch/mn10300/include/asm/atomic.h b/arch/mn10300/include/asm/atomic.h
index 975e1841ca64..cadeb1e2cdfc 100644
--- a/arch/mn10300/include/asm/atomic.h
+++ b/arch/mn10300/include/asm/atomic.h
@@ -13,6 +13,7 @@
#include <asm/irqflags.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
#ifndef CONFIG_SMP
#include <asm-generic/atomic.h>
@@ -234,12 +235,6 @@ static inline void atomic_set_mask(unsigned long mask, unsigned long *addr)
#endif
}
-/* Atomic operations are already serializing on MN10300??? */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif /* __KERNEL__ */
#endif /* CONFIG_SMP */
#endif /* _ASM_ATOMIC_H */
diff --git a/arch/mn10300/include/asm/bitops.h b/arch/mn10300/include/asm/bitops.h
index 596bb2706d81..fe6f8e2c3617 100644
--- a/arch/mn10300/include/asm/bitops.h
+++ b/arch/mn10300/include/asm/bitops.h
@@ -18,9 +18,7 @@
#define __ASM_BITOPS_H
#include <asm/cpu-regs.h>
-
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
+#include <asm/barrier.h>
/*
* set bit
diff --git a/arch/mn10300/mm/tlb-smp.c b/arch/mn10300/mm/tlb-smp.c
index 3e57faf04083..e5d0ef722bfa 100644
--- a/arch/mn10300/mm/tlb-smp.c
+++ b/arch/mn10300/mm/tlb-smp.c
@@ -78,9 +78,9 @@ void smp_flush_tlb(void *unused)
else
local_flush_tlb_page(flush_mm, flush_va);
- smp_mb__before_clear_bit();
+ smp_mb__before_atomic();
cpumask_clear_cpu(cpu_id, &flush_cpumask);
- smp_mb__after_clear_bit();
+ smp_mb__after_atomic();
out:
put_cpu();
}
diff --git a/arch/openrisc/include/asm/bitops.h b/arch/openrisc/include/asm/bitops.h
index 2c64f2228dc7..3003cdad561b 100644
--- a/arch/openrisc/include/asm/bitops.h
+++ b/arch/openrisc/include/asm/bitops.h
@@ -27,14 +27,7 @@
#include <linux/irqflags.h>
#include <linux/compiler.h>
-
-/*
- * clear_bit may not imply a memory barrier
- */
-#ifndef smp_mb__before_clear_bit
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
-#endif
+#include <asm/barrier.h>
#include <asm/bitops/__ffs.h>
#include <asm-generic/bitops/ffz.h>
diff --git a/arch/parisc/include/asm/atomic.h b/arch/parisc/include/asm/atomic.h
index 472886ceab1d..0be2db2c7d44 100644
--- a/arch/parisc/include/asm/atomic.h
+++ b/arch/parisc/include/asm/atomic.h
@@ -7,6 +7,7 @@
#include <linux/types.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
/*
* Atomic operations that C can't guarantee us. Useful for
@@ -143,11 +144,6 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
#define ATOMIC_INIT(i) { (i) }
-#define smp_mb__before_atomic_dec() smp_mb()
-#define smp_mb__after_atomic_dec() smp_mb()
-#define smp_mb__before_atomic_inc() smp_mb()
-#define smp_mb__after_atomic_inc() smp_mb()
-
#ifdef CONFIG_64BIT
#define ATOMIC64_INIT(i) { (i) }
diff --git a/arch/parisc/include/asm/bitops.h b/arch/parisc/include/asm/bitops.h
index 8c9b631d2a78..3f9406d9b9d6 100644
--- a/arch/parisc/include/asm/bitops.h
+++ b/arch/parisc/include/asm/bitops.h
@@ -8,6 +8,7 @@
#include <linux/compiler.h>
#include <asm/types.h> /* for BITS_PER_LONG/SHIFT_PER_LONG */
#include <asm/byteorder.h>
+#include <asm/barrier.h>
#include <linux/atomic.h>
/*
@@ -19,9 +20,6 @@
#define CHOP_SHIFTCOUNT(x) (((unsigned long) (x)) & (BITS_PER_LONG - 1))
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
-
/* See http://marc.theaimsgroup.com/?t=108826637900003 for discussion
* on use of volatile and __*_bit() (set/clear/change):
* *_bit() want use of volatile.
diff --git a/arch/powerpc/include/asm/atomic.h b/arch/powerpc/include/asm/atomic.h
index e3b1d41c89be..28992d012926 100644
--- a/arch/powerpc/include/asm/atomic.h
+++ b/arch/powerpc/include/asm/atomic.h
@@ -8,6 +8,7 @@
#ifdef __KERNEL__
#include <linux/types.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
#define ATOMIC_INIT(i) { (i) }
@@ -270,11 +271,6 @@ static __inline__ int atomic_dec_if_positive(atomic_t *v)
}
#define atomic_dec_if_positive atomic_dec_if_positive
-#define smp_mb__before_atomic_dec() smp_mb()
-#define smp_mb__after_atomic_dec() smp_mb()
-#define smp_mb__before_atomic_inc() smp_mb()
-#define smp_mb__after_atomic_inc() smp_mb()
-
#ifdef __powerpc64__
#define ATOMIC64_INIT(i) { (i) }
diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h
index f89da808ce31..bab79a110c7b 100644
--- a/arch/powerpc/include/asm/barrier.h
+++ b/arch/powerpc/include/asm/barrier.h
@@ -84,4 +84,7 @@ do { \
___p1; \
})
+#define smp_mb__before_atomic() smp_mb()
+#define smp_mb__after_atomic() smp_mb()
+
#endif /* _ASM_POWERPC_BARRIER_H */
diff --git a/arch/powerpc/include/asm/bitops.h b/arch/powerpc/include/asm/bitops.h
index a5e9a7d494d8..bd3bd573d0ae 100644
--- a/arch/powerpc/include/asm/bitops.h
+++ b/arch/powerpc/include/asm/bitops.h
@@ -51,11 +51,7 @@
#define PPC_BIT(bit) (1UL << PPC_BITLSHIFT(bit))
#define PPC_BITMASK(bs, be) ((PPC_BIT(bs) - PPC_BIT(be)) | PPC_BIT(bs))
-/*
- * clear_bit doesn't imply a memory barrier
- */
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
+#include <asm/barrier.h>
/* Macro for generating the ***_bits() functions */
#define DEFINE_BITOP(fn, op, prefix) \
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 18d7c80ddeb9..51dbace3269b 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -81,7 +81,7 @@ void crash_ipi_callback(struct pt_regs *regs)
}
atomic_inc(&cpus_in_crash);
- smp_mb__after_atomic_inc();
+ smp_mb__after_atomic();
/*
* Starting the kdump boot.
diff --git a/arch/s390/include/asm/atomic.h b/arch/s390/include/asm/atomic.h
index 1d4706114a45..fa934fe080c1 100644
--- a/arch/s390/include/asm/atomic.h
+++ b/arch/s390/include/asm/atomic.h
@@ -412,9 +412,4 @@ static inline long long atomic64_dec_if_positive(atomic64_t *v)
#define atomic64_dec_and_test(_v) (atomic64_sub_return(1, _v) == 0)
#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
-#define smp_mb__before_atomic_dec() smp_mb()
-#define smp_mb__after_atomic_dec() smp_mb()
-#define smp_mb__before_atomic_inc() smp_mb()
-#define smp_mb__after_atomic_inc() smp_mb()
-
#endif /* __ARCH_S390_ATOMIC__ */
diff --git a/arch/s390/include/asm/barrier.h b/arch/s390/include/asm/barrier.h
index 578680f6207a..19ff956b752b 100644
--- a/arch/s390/include/asm/barrier.h
+++ b/arch/s390/include/asm/barrier.h
@@ -27,8 +27,9 @@
#define smp_rmb() rmb()
#define smp_wmb() wmb()
#define smp_read_barrier_depends() read_barrier_depends()
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
+
+#define smp_mb__before_atomic() smp_mb()
+#define smp_mb__after_atomic() smp_mb()
#define set_mb(var, value) do { var = value; mb(); } while (0)
diff --git a/arch/score/include/asm/bitops.h b/arch/score/include/asm/bitops.h
index a304096b1894..c1bf8d6d0fb0 100644
--- a/arch/score/include/asm/bitops.h
+++ b/arch/score/include/asm/bitops.h
@@ -2,12 +2,7 @@
#define _ASM_SCORE_BITOPS_H
#include <asm/byteorder.h> /* swab32 */
-
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
+#include <asm/barrier.h>
#include <asm-generic/bitops.h>
#include <asm-generic/bitops/__fls.h>
diff --git a/arch/sh/include/asm/atomic.h b/arch/sh/include/asm/atomic.h
index f4c1c20bcdf6..f57b8a6743b3 100644
--- a/arch/sh/include/asm/atomic.h
+++ b/arch/sh/include/asm/atomic.h
@@ -10,6 +10,7 @@
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
#define ATOMIC_INIT(i) { (i) }
@@ -62,9 +63,4 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
return c;
}
-#define smp_mb__before_atomic_dec() smp_mb()
-#define smp_mb__after_atomic_dec() smp_mb()
-#define smp_mb__before_atomic_inc() smp_mb()
-#define smp_mb__after_atomic_inc() smp_mb()
-
#endif /* __ASM_SH_ATOMIC_H */
diff --git a/arch/sh/include/asm/bitops.h b/arch/sh/include/asm/bitops.h
index ea8706d94f08..fc8e652cf173 100644
--- a/arch/sh/include/asm/bitops.h
+++ b/arch/sh/include/asm/bitops.h
@@ -9,6 +9,7 @@
/* For __swab32 */
#include <asm/byteorder.h>
+#include <asm/barrier.h>
#ifdef CONFIG_GUSA_RB
#include <asm/bitops-grb.h>
@@ -22,12 +23,6 @@
#include <asm-generic/bitops/non-atomic.h>
#endif
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
-
#ifdef CONFIG_SUPERH32
static inline unsigned long ffz(unsigned long word)
{
diff --git a/arch/sparc/include/asm/atomic_32.h b/arch/sparc/include/asm/atomic_32.h
index 905832aa9e9e..f08fe51b264d 100644
--- a/arch/sparc/include/asm/atomic_32.h
+++ b/arch/sparc/include/asm/atomic_32.h
@@ -14,6 +14,7 @@
#include <linux/types.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
#include <asm-generic/atomic64.h>
@@ -52,10 +53,4 @@ extern void atomic_set(atomic_t *, int);
#define atomic_dec_and_test(v) (atomic_dec_return(v) == 0)
#define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0)
-/* Atomic operations are already serializing */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif /* !(__ARCH_SPARC_ATOMIC__) */
diff --git a/arch/sparc/include/asm/atomic_64.h b/arch/sparc/include/asm/atomic_64.h
index be56a244c9cf..8b2f1bde2889 100644
--- a/arch/sparc/include/asm/atomic_64.h
+++ b/arch/sparc/include/asm/atomic_64.h
@@ -9,6 +9,7 @@
#include <linux/types.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
#define ATOMIC_INIT(i) { (i) }
#define ATOMIC64_INIT(i) { (i) }
@@ -108,10 +109,4 @@ static inline long atomic64_add_unless(atomic64_t *v, long a, long u)
extern long atomic64_dec_if_positive(atomic64_t *v);
-/* Atomic operations are already serializing */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif /* !(__ARCH_SPARC64_ATOMIC__) */
diff --git a/arch/sparc/include/asm/barrier_64.h b/arch/sparc/include/asm/barrier_64.h
index b5aad964558e..305dcc3dc721 100644
--- a/arch/sparc/include/asm/barrier_64.h
+++ b/arch/sparc/include/asm/barrier_64.h
@@ -68,4 +68,7 @@ do { \
___p1; \
})
+#define smp_mb__before_atomic() barrier()
+#define smp_mb__after_atomic() barrier()
+
#endif /* !(__SPARC64_BARRIER_H) */
diff --git a/arch/sparc/include/asm/bitops_32.h b/arch/sparc/include/asm/bitops_32.h
index 25a676653d45..88c9a962502c 100644
--- a/arch/sparc/include/asm/bitops_32.h
+++ b/arch/sparc/include/asm/bitops_32.h
@@ -90,9 +90,6 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
#include <asm-generic/bitops/non-atomic.h>
-#define smp_mb__before_clear_bit() do { } while(0)
-#define smp_mb__after_clear_bit() do { } while(0)
-
#include <asm-generic/bitops/ffz.h>
#include <asm-generic/bitops/__ffs.h>
#include <asm-generic/bitops/sched.h>
diff --git a/arch/sparc/include/asm/bitops_64.h b/arch/sparc/include/asm/bitops_64.h
index 29011cc0e4be..f1a051ca301a 100644
--- a/arch/sparc/include/asm/bitops_64.h
+++ b/arch/sparc/include/asm/bitops_64.h
@@ -13,6 +13,7 @@
#include <linux/compiler.h>
#include <asm/byteorder.h>
+#include <asm/barrier.h>
extern int test_and_set_bit(unsigned long nr, volatile unsigned long *addr);
extern int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr);
@@ -23,9 +24,6 @@ extern void change_bit(unsigned long nr, volatile unsigned long *addr);
#include <asm-generic/bitops/non-atomic.h>
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
diff --git a/arch/tile/include/asm/atomic_32.h b/arch/tile/include/asm/atomic_32.h
index 1ad4a1f7d42b..1b109fad9fff 100644
--- a/arch/tile/include/asm/atomic_32.h
+++ b/arch/tile/include/asm/atomic_32.h
@@ -169,16 +169,6 @@ static inline void atomic64_set(atomic64_t *v, long long n)
#define atomic64_dec_and_test(v) (atomic64_dec_return((v)) == 0)
#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1LL, 0LL)
-/*
- * We need to barrier before modifying the word, since the _atomic_xxx()
- * routines just tns the lock and then read/modify/write of the word.
- * But after the word is updated, the routine issues an "mf" before returning,
- * and since it's a function call, we don't even need a compiler barrier.
- */
-#define smp_mb__before_atomic_dec() smp_mb()
-#define smp_mb__before_atomic_inc() smp_mb()
-#define smp_mb__after_atomic_dec() do { } while (0)
-#define smp_mb__after_atomic_inc() do { } while (0)
#endif /* !__ASSEMBLY__ */
diff --git a/arch/tile/include/asm/atomic_64.h b/arch/tile/include/asm/atomic_64.h
index ad220eed05fc..7b11c5fadd42 100644
--- a/arch/tile/include/asm/atomic_64.h
+++ b/arch/tile/include/asm/atomic_64.h
@@ -105,12 +105,6 @@ static inline long atomic64_add_unless(atomic64_t *v, long a, long u)
#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
-/* Atomic dec and inc don't implement barrier, so provide them if needed. */
-#define smp_mb__before_atomic_dec() smp_mb()
-#define smp_mb__after_atomic_dec() smp_mb()
-#define smp_mb__before_atomic_inc() smp_mb()
-#define smp_mb__after_atomic_inc() smp_mb()
-
/* Define this to indicate that cmpxchg is an efficient operation. */
#define __HAVE_ARCH_CMPXCHG
diff --git a/arch/tile/include/asm/barrier.h b/arch/tile/include/asm/barrier.h
index b5a05d050a8f..96a42ae79f4d 100644
--- a/arch/tile/include/asm/barrier.h
+++ b/arch/tile/include/asm/barrier.h
@@ -72,6 +72,20 @@ mb_incoherent(void)
#define mb() fast_mb()
#define iob() fast_iob()
+#ifndef __tilegx__ /* 32 bit */
+/*
+ * We need to barrier before modifying the word, since the _atomic_xxx()
+ * routines just tns the lock and then read/modify/write of the word.
+ * But after the word is updated, the routine issues an "mf" before returning,
+ * and since it's a function call, we don't even need a compiler barrier.
+ */
+#define smp_mb__before_atomic() smp_mb()
+#define smp_mb__after_atomic() do { } while (0)
+#else /* 64 bit */
+#define smp_mb__before_atomic() smp_mb()
+#define smp_mb__after_atomic() smp_mb()
+#endif
+
#include <asm-generic/barrier.h>
#endif /* !__ASSEMBLY__ */
diff --git a/arch/tile/include/asm/bitops.h b/arch/tile/include/asm/bitops.h
index d5a206865036..20caa346ac06 100644
--- a/arch/tile/include/asm/bitops.h
+++ b/arch/tile/include/asm/bitops.h
@@ -17,6 +17,7 @@
#define _ASM_TILE_BITOPS_H
#include <linux/types.h>
+#include <asm/barrier.h>
#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
diff --git a/arch/tile/include/asm/bitops_32.h b/arch/tile/include/asm/bitops_32.h
index 386865ad2f55..bbf7b666f21d 100644
--- a/arch/tile/include/asm/bitops_32.h
+++ b/arch/tile/include/asm/bitops_32.h
@@ -49,8 +49,8 @@ static inline void set_bit(unsigned nr, volatile unsigned long *addr)
* restricted to acting on a single-word quantity.
*
* clear_bit() may not contain a memory barrier, so if it is used for
- * locking purposes, you should call smp_mb__before_clear_bit() and/or
- * smp_mb__after_clear_bit() to ensure changes are visible on other cpus.
+ * locking purposes, you should call smp_mb__before_atomic() and/or
+ * smp_mb__after_atomic() to ensure changes are visible on other cpus.
*/
static inline void clear_bit(unsigned nr, volatile unsigned long *addr)
{
@@ -121,10 +121,6 @@ static inline int test_and_change_bit(unsigned nr,
return (_atomic_xor(addr, mask) & mask) != 0;
}
-/* See discussion at smp_mb__before_atomic_dec() in <asm/atomic_32.h>. */
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() do {} while (0)
-
#include <asm-generic/bitops/ext2-atomic.h>
#endif /* _ASM_TILE_BITOPS_32_H */
diff --git a/arch/tile/include/asm/bitops_64.h b/arch/tile/include/asm/bitops_64.h
index ad34cd056085..bb1a29221fcd 100644
--- a/arch/tile/include/asm/bitops_64.h
+++ b/arch/tile/include/asm/bitops_64.h
@@ -32,10 +32,6 @@ static inline void clear_bit(unsigned nr, volatile unsigned long *addr)
__insn_fetchand((void *)(addr + nr / BITS_PER_LONG), ~mask);
}
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
-
-
static inline void change_bit(unsigned nr, volatile unsigned long *addr)
{
unsigned long mask = (1UL << (nr % BITS_PER_LONG));
diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h
index b17f4f48ecd7..6dd1c7dd0473 100644
--- a/arch/x86/include/asm/atomic.h
+++ b/arch/x86/include/asm/atomic.h
@@ -7,6 +7,7 @@
#include <asm/alternative.h>
#include <asm/cmpxchg.h>
#include <asm/rmwcc.h>
+#include <asm/barrier.h>
/*
* Atomic operations that C can't guarantee us. Useful for
@@ -243,12 +244,6 @@ static inline void atomic_or_long(unsigned long *v1, unsigned long v2)
: : "r" ((unsigned)(mask)), "m" (*(addr)) \
: "memory")
-/* Atomic operations are already serializing on x86 */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#ifdef CONFIG_X86_32
# include <asm/atomic64_32.h>
#else
diff --git a/arch/x86/include/asm/barrier.h b/arch/x86/include/asm/barrier.h
index 69bbb4845020..5c7198cca5ed 100644
--- a/arch/x86/include/asm/barrier.h
+++ b/arch/x86/include/asm/barrier.h
@@ -137,6 +137,10 @@ do { \
#endif
+/* Atomic operations are already serializing on x86 */
+#define smp_mb__before_atomic() barrier()
+#define smp_mb__after_atomic() barrier()
+
/*
* Stop RDTSC speculation. This is needed when you need to use RDTSC
* (or get_cycles or vread that possibly accesses the TSC) in a defined
diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h
index 9fc1af74dc83..afcd35d331de 100644
--- a/arch/x86/include/asm/bitops.h
+++ b/arch/x86/include/asm/bitops.h
@@ -15,6 +15,7 @@
#include <linux/compiler.h>
#include <asm/alternative.h>
#include <asm/rmwcc.h>
+#include <asm/barrier.h>
#if BITS_PER_LONG == 32
# define _BITOPS_LONG_SHIFT 5
@@ -102,7 +103,7 @@ static inline void __set_bit(long nr, volatile unsigned long *addr)
*
* clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
- * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/
static __always_inline void
@@ -156,9 +157,6 @@ static inline void __clear_bit_unlock(long nr, volatile unsigned long *addr)
__clear_bit(nr, addr);
}
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
-
/**
* __change_bit - Toggle a bit in memory
* @nr: the bit to change
diff --git a/arch/x86/include/asm/sync_bitops.h b/arch/x86/include/asm/sync_bitops.h
index 05af3b31d522..f28a24b51dc7 100644
--- a/arch/x86/include/asm/sync_bitops.h
+++ b/arch/x86/include/asm/sync_bitops.h
@@ -41,7 +41,7 @@ static inline void sync_set_bit(long nr, volatile unsigned long *addr)
*
* sync_clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
- * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/
static inline void sync_clear_bit(long nr, volatile unsigned long *addr)
diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
index a698d7165c96..eab67047dec3 100644
--- a/arch/x86/kernel/apic/hw_nmi.c
+++ b/arch/x86/kernel/apic/hw_nmi.c
@@ -57,7 +57,7 @@ void arch_trigger_all_cpu_backtrace(void)
}
clear_bit(0, &backtrace_flag);
- smp_mb__after_clear_bit();
+ smp_mb__after_atomic();
}
static int __kprobes
diff --git a/arch/xtensa/include/asm/atomic.h b/arch/xtensa/include/asm/atomic.h
index e7fb447bce8e..e5103b47a8ce 100644
--- a/arch/xtensa/include/asm/atomic.h
+++ b/arch/xtensa/include/asm/atomic.h
@@ -19,6 +19,7 @@
#ifdef __KERNEL__
#include <asm/processor.h>
#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
#define ATOMIC_INIT(i) { (i) }
@@ -387,12 +388,6 @@ static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
#endif
}
-/* Atomic operations are already serializing */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif /* __KERNEL__ */
#endif /* _XTENSA_ATOMIC_H */
diff --git a/arch/xtensa/include/asm/barrier.h b/arch/xtensa/include/asm/barrier.h
index 0a24b04d6b21..5b88774c75ab 100644
--- a/arch/xtensa/include/asm/barrier.h
+++ b/arch/xtensa/include/asm/barrier.h
@@ -13,6 +13,9 @@
#define rmb() barrier()
#define wmb() mb()
+#define smp_mb__before_atomic() barrier()
+#define smp_mb__after_atomic() barrier()
+
#include <asm-generic/barrier.h>
#endif /* _XTENSA_SYSTEM_H */
diff --git a/arch/xtensa/include/asm/bitops.h b/arch/xtensa/include/asm/bitops.h
index 7b6873ae84c2..3f44fa2a53e9 100644
--- a/arch/xtensa/include/asm/bitops.h
+++ b/arch/xtensa/include/asm/bitops.h
@@ -21,9 +21,7 @@
#include <asm/processor.h>
#include <asm/byteorder.h>
-
-#define smp_mb__before_clear_bit() smp_mb()
-#define smp_mb__after_clear_bit() smp_mb()
+#include <asm/barrier.h>
#include <asm-generic/bitops/non-atomic.h>