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| author |   Ingo Molnar <mingo@kernel.org> | 2019-02-11 14:27:05 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-02-11 14:27:05 +0100 |
| commit | 41b8687191cfd0326db03b0e82fb09d8c98ca641 (patch) | |
| tree | a214babca0a181c67c25a615d608465a5f92f8c4 /scripts/atomic/fallbacks/inc_not_zero | |
| parent | futex: Convert futex_pi_state.refcount to refcount_t (diff) | |
| parent | locking/atomics: Fix out-of-tree build (diff) | |
| download | linux-dev-41b8687191cfd0326db03b0e82fb09d8c98ca641.tar.xz linux-dev-41b8687191cfd0326db03b0e82fb09d8c98ca641.zip | |
Merge branch 'locking/atomics' into locking/core, to pick up WIP commits
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'scripts/atomic/fallbacks/inc_not_zero')
| -rwxr-xr-x | scripts/atomic/fallbacks/inc_not_zero | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/scripts/atomic/fallbacks/inc_not_zero b/scripts/atomic/fallbacks/inc_not_zero new file mode 100755 index 000000000000..a7c45c8d107c --- /dev/null +++ b/scripts/atomic/fallbacks/inc_not_zero @@ -0,0 +1,14 @@ +cat <<EOF +/** + * ${atomic}_inc_not_zero - increment unless the number is zero + * @v: pointer of type ${atomic}_t + * + * Atomically increments @v by 1, if @v is non-zero. + * Returns true if the increment was done. + */ +static inline bool +${atomic}_inc_not_zero(${atomic}_t *v) +{ + return ${atomic}_add_unless(v, 1, 0); +} +EOF |