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| author | Thomas Gleixner <tglx@linutronix.de> | 2023-03-23 23:55:30 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-03-28 11:39:29 +0300 |
| commit | e5ab9eff46b04c5a04778e40d7092fed3fda52ca (patch) | |
| tree | 87cac8205ddaf1e0e81fba3be4f0e8d7dcf7f584 /scripts/atomic | |
| parent | fe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff) | |
| download | linux-e5ab9eff46b04c5a04778e40d7092fed3fda52ca.tar.xz | |
atomics: Provide atomic_add_negative() variants
atomic_add_negative() does not provide the relaxed/acquire/release
variants.
Provide them in preparation for a new scalable reference count algorithm.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20230323102800.101763813@linutronix.de
Diffstat (limited to 'scripts/atomic')
| -rw-r--r-- | scripts/atomic/atomics.tbl | 2 | ||||
| -rwxr-xr-x | scripts/atomic/fallbacks/add_negative | 11 |
2 files changed, 6 insertions, 7 deletions
diff --git a/scripts/atomic/atomics.tbl b/scripts/atomic/atomics.tbl index fbee2f6190d9..85ca8d9b5c27 100644 --- a/scripts/atomic/atomics.tbl +++ b/scripts/atomic/atomics.tbl @@ -33,7 +33,7 @@ try_cmpxchg B v p:old i:new sub_and_test b i v dec_and_test b v inc_and_test b v -add_negative b i v +add_negative B i v add_unless fb v i:a i:u inc_not_zero b v inc_unless_negative b v diff --git a/scripts/atomic/fallbacks/add_negative b/scripts/atomic/fallbacks/add_negative index 15caa2eb2371..e5980abf5904 100755 --- a/scripts/atomic/fallbacks/add_negative +++ b/scripts/atomic/fallbacks/add_negative @@ -1,16 +1,15 @@ cat <<EOF /** - * arch_${atomic}_add_negative - add and test if negative + * arch_${atomic}_add_negative${order} - Add and test if negative * @i: integer value to add * @v: pointer of type ${atomic}_t * - * Atomically adds @i to @v and returns true - * if the result is negative, or false when - * result is greater than or equal to zero. + * Atomically adds @i to @v and returns true if the result is negative, + * or false when the result is greater than or equal to zero. */ static __always_inline bool -arch_${atomic}_add_negative(${int} i, ${atomic}_t *v) +arch_${atomic}_add_negative${order}(${int} i, ${atomic}_t *v) { - return arch_${atomic}_add_return(i, v) < 0; + return arch_${atomic}_add_return${order}(i, v) < 0; } EOF |