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| author | Peter Zijlstra <peterz@infradead.org> | 2017-06-07 17:51:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-08-10 12:29:03 +0200 |
| commit | a9668cd6ee288c4838bc668880ac085be551cac2 (patch) | |
| tree | 5a4b71cef5d9f8acf8f2c67c4c518146b1c49a51 /Documentation/memory-barriers.txt | |
| parent | locking: Introduce smp_mb__after_spinlock() (diff) | |
| download | linux-a9668cd6ee288c4838bc668880ac085be551cac2.tar.xz linux-a9668cd6ee288c4838bc668880ac085be551cac2.zip | |
locking: Remove smp_mb__before_spinlock()
Now that there are no users of smp_mb__before_spinlock() left, remove
it entirely.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/memory-barriers.txt')
| -rw-r--r-- | Documentation/memory-barriers.txt | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt index 9f34364922c8..d1d1716f904b 100644 --- a/Documentation/memory-barriers.txt +++ b/Documentation/memory-barriers.txt @@ -1981,10 +1981,7 @@ for each construct. These operations all imply certain barriers: ACQUIRE operation has completed. Memory operations issued before the ACQUIRE may be completed after - the ACQUIRE operation has completed. An smp_mb__before_spinlock(), - combined with a following ACQUIRE, orders prior stores against - subsequent loads and stores. Note that this is weaker than smp_mb()! - The smp_mb__before_spinlock() primitive is free on many architectures. + the ACQUIRE operation has completed. (2) RELEASE operation implication: |