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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
| commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
| tree | a94efe259b9009378be6d90eb30d2b019d95c194 /scripts/atomic/fallbacks/dec_unless_positive | |
| parent | Initial commit. (diff) | |
| download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip | |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'scripts/atomic/fallbacks/dec_unless_positive')
| -rwxr-xr-x | scripts/atomic/fallbacks/dec_unless_positive | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/scripts/atomic/fallbacks/dec_unless_positive b/scripts/atomic/fallbacks/dec_unless_positive new file mode 100755 index 000000000..dcab6848c --- /dev/null +++ b/scripts/atomic/fallbacks/dec_unless_positive @@ -0,0 +1,14 @@ +cat <<EOF +static __always_inline bool +${arch}${atomic}_dec_unless_positive(${atomic}_t *v) +{ + ${int} c = ${arch}${atomic}_read(v); + + do { + if (unlikely(c > 0)) + return false; + } while (!${arch}${atomic}_try_cmpxchg(v, &c, c - 1)); + + return true; +} +EOF |