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| author | Sean Paul <seanpaul@chromium.org> | 2019-04-10 15:50:49 -0400 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2019-04-10 15:50:49 -0400 |
| commit | 3bfaf1f7044c6a3b1e00fcad2d0529f0da449d67 (patch) | |
| tree | 490bc7e8aa29c2ee41eb4813683f1aa23971abd3 /scripts/atomic/fallbacks/dec_if_positive | |
| parent | 669105a74a287b14cdec04c64eb51db1bb890f64 (diff) | |
| parent | 14d2bd53a47a7e1cb3e03d00a6b952734cf90f3f (diff) | |
| download | talos-op-linux-3bfaf1f7044c6a3b1e00fcad2d0529f0da449d67.tar.gz talos-op-linux-3bfaf1f7044c6a3b1e00fcad2d0529f0da449d67.zip | |
Merge drm/drm-next into drm-misc-next
Finally have a reason for a backmerge other than "it's been a while"!
Backmerging drm-next to -misc-next to facilitate Rob Herring's work on
Panfrost.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Diffstat (limited to 'scripts/atomic/fallbacks/dec_if_positive')
| -rwxr-xr-x | scripts/atomic/fallbacks/dec_if_positive | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/scripts/atomic/fallbacks/dec_if_positive b/scripts/atomic/fallbacks/dec_if_positive new file mode 100755 index 000000000000..c52eacec43c8 --- /dev/null +++ b/scripts/atomic/fallbacks/dec_if_positive @@ -0,0 +1,15 @@ +cat <<EOF +static inline ${ret} +${atomic}_dec_if_positive(${atomic}_t *v) +{ + ${int} dec, c = ${atomic}_read(v); + + do { + dec = c - 1; + if (unlikely(dec < 0)) + break; + } while (!${atomic}_try_cmpxchg(v, &c, dec)); + + return dec; +} +EOF |
