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authorMark Rutland <mark.rutland@arm.com>2018-06-21 15:13:21 +0300
committerIngo Molnar <mingo@kernel.org>2018-06-21 15:25:24 +0300
commit7cc7eaad49c30ac165ecf84d95b26f7e0d53bd97 (patch)
tree0b1476f680f75f9e8e704e2d86195db23a082887 /include/linux/atomic.h
parentb3a2a05f9111de0b79312e577608a27b0318c0a1 (diff)
downloadlinux-7cc7eaad49c30ac165ecf84d95b26f7e0d53bd97.tar.xz
atomics/treewide: Clean up '*_andnot()' ifdeffery
The ifdeffery for atomic*_{fetch_,}andnot() is unlike that for all the other atomics. If atomic*_andnot() is not defined, the corresponding atomic*_fetch_andnot() is assumed to not be defined. Additionally, the fallbacks for the various ordering cases are written much later in atomic.h as static inlines. This isn't problematic today, but gets in the way of scripting the generation of atomics. To prepare for scripting, this patch: * Switches to separate ifdefs for atomic*_andnot() and atomic*_fetch_andnot(), updating implementations as appropriate. * Moves the fallbacks into the standards ifdefs, as macro expansions rather than static inlines. * Removes trivial andnot implementations from architectures, where these are superseded by core code. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Will Deacon <will.deacon@arm.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/lkml/20180621121321.4761-19-mark.rutland@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/atomic.h')
-rw-r--r--include/linux/atomic.h96
1 files changed, 30 insertions, 66 deletions
diff --git a/include/linux/atomic.h b/include/linux/atomic.h
index 93fe5b4041e1..8e04f1f69bd9 100644
--- a/include/linux/atomic.h
+++ b/include/linux/atomic.h
@@ -354,12 +354,22 @@
#endif
#endif /* atomic_fetch_and_relaxed */
-#ifdef atomic_andnot
-/* atomic_fetch_andnot_relaxed */
+#ifndef atomic_andnot
+#define atomic_andnot(i, v) atomic_and(~(int)(i), (v))
+#endif
+
#ifndef atomic_fetch_andnot_relaxed
-#define atomic_fetch_andnot_relaxed atomic_fetch_andnot
-#define atomic_fetch_andnot_acquire atomic_fetch_andnot
-#define atomic_fetch_andnot_release atomic_fetch_andnot
+
+#ifndef atomic_fetch_andnot
+#define atomic_fetch_andnot(i, v) atomic_fetch_and(~(int)(i), (v))
+#define atomic_fetch_andnot_relaxed(i, v) atomic_fetch_and_relaxed(~(int)(i), (v))
+#define atomic_fetch_andnot_acquire(i, v) atomic_fetch_and_acquire(~(int)(i), (v))
+#define atomic_fetch_andnot_release(i, v) atomic_fetch_and_release(~(int)(i), (v))
+#else /* atomic_fetch_andnot */
+#define atomic_fetch_andnot_relaxed atomic_fetch_andnot
+#define atomic_fetch_andnot_acquire atomic_fetch_andnot
+#define atomic_fetch_andnot_release atomic_fetch_andnot
+#endif /* atomic_fetch_andnot */
#else /* atomic_fetch_andnot_relaxed */
@@ -378,7 +388,6 @@
__atomic_op_fence(atomic_fetch_andnot, __VA_ARGS__)
#endif
#endif /* atomic_fetch_andnot_relaxed */
-#endif /* atomic_andnot */
/* atomic_fetch_xor_relaxed */
#ifndef atomic_fetch_xor_relaxed
@@ -655,33 +664,6 @@ static inline bool atomic_add_negative(int i, atomic_t *v)
}
#endif
-#ifndef atomic_andnot
-static inline void atomic_andnot(int i, atomic_t *v)
-{
- atomic_and(~i, v);
-}
-
-static inline int atomic_fetch_andnot(int i, atomic_t *v)
-{
- return atomic_fetch_and(~i, v);
-}
-
-static inline int atomic_fetch_andnot_relaxed(int i, atomic_t *v)
-{
- return atomic_fetch_and_relaxed(~i, v);
-}
-
-static inline int atomic_fetch_andnot_acquire(int i, atomic_t *v)
-{
- return atomic_fetch_and_acquire(~i, v);
-}
-
-static inline int atomic_fetch_andnot_release(int i, atomic_t *v)
-{
- return atomic_fetch_and_release(~i, v);
-}
-#endif
-
#ifndef atomic_inc_unless_negative
static inline bool atomic_inc_unless_negative(atomic_t *v)
{
@@ -1029,12 +1011,22 @@ static inline int atomic_dec_if_positive(atomic_t *v)
#endif
#endif /* atomic64_fetch_and_relaxed */
-#ifdef atomic64_andnot
-/* atomic64_fetch_andnot_relaxed */
+#ifndef atomic64_andnot
+#define atomic64_andnot(i, v) atomic64_and(~(long long)(i), (v))
+#endif
+
#ifndef atomic64_fetch_andnot_relaxed
-#define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot
-#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot
-#define atomic64_fetch_andnot_release atomic64_fetch_andnot
+
+#ifndef atomic64_fetch_andnot
+#define atomic64_fetch_andnot(i, v) atomic64_fetch_and(~(long long)(i), (v))
+#define atomic64_fetch_andnot_relaxed(i, v) atomic64_fetch_and_relaxed(~(long long)(i), (v))
+#define atomic64_fetch_andnot_acquire(i, v) atomic64_fetch_and_acquire(~(long long)(i), (v))
+#define atomic64_fetch_andnot_release(i, v) atomic64_fetch_and_release(~(long long)(i), (v))
+#else /* atomic64_fetch_andnot */
+#define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot
+#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot
+#define atomic64_fetch_andnot_release atomic64_fetch_andnot
+#endif /* atomic64_fetch_andnot */
#else /* atomic64_fetch_andnot_relaxed */
@@ -1053,7 +1045,6 @@ static inline int atomic_dec_if_positive(atomic_t *v)
__atomic_op_fence(atomic64_fetch_andnot, __VA_ARGS__)
#endif
#endif /* atomic64_fetch_andnot_relaxed */
-#endif /* atomic64_andnot */
/* atomic64_fetch_xor_relaxed */
#ifndef atomic64_fetch_xor_relaxed
@@ -1262,33 +1253,6 @@ static inline bool atomic64_add_negative(long long i, atomic64_t *v)
}
#endif
-#ifndef atomic64_andnot
-static inline void atomic64_andnot(long long i, atomic64_t *v)
-{
- atomic64_and(~i, v);
-}
-
-static inline long long atomic64_fetch_andnot(long long i, atomic64_t *v)
-{
- return atomic64_fetch_and(~i, v);
-}
-
-static inline long long atomic64_fetch_andnot_relaxed(long long i, atomic64_t *v)
-{
- return atomic64_fetch_and_relaxed(~i, v);
-}
-
-static inline long long atomic64_fetch_andnot_acquire(long long i, atomic64_t *v)
-{
- return atomic64_fetch_and_acquire(~i, v);
-}
-
-static inline long long atomic64_fetch_andnot_release(long long i, atomic64_t *v)
-{
- return atomic64_fetch_and_release(~i, v);
-}
-#endif
-
#ifndef atomic64_inc_unless_negative
static inline bool atomic64_inc_unless_negative(atomic64_t *v)
{