diff options
| author | Ingo Molnar <mingo@kernel.org> | 2019-06-17 12:12:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-06-17 12:12:27 +0200 |
| commit | 23da766ab1dc005860b675bf048226a11a748bf9 (patch) | |
| tree | 3f8dbfc2cf68f5da3faa3a377087b06dd8ad343d /lib/lockref.c | |
| parent | af75d1a9a9f75bf030c2f35705f1ff6d226f96fe (diff) | |
| parent | 9e0babf2c06c73cda2c0cd37a1653d823adb40ec (diff) | |
| download | linux-23da766ab1dc005860b675bf048226a11a748bf9.tar.bz2 | |
Merge tag 'v5.2-rc5' into sched/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/lockref.c')
| -rw-r--r-- | lib/lockref.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/lockref.c b/lib/lockref.c index 3d468b53d4c9..5b34bbd3eba8 100644 --- a/lib/lockref.c +++ b/lib/lockref.c @@ -9,6 +9,7 @@ * failure case. */ #define CMPXCHG_LOOP(CODE, SUCCESS) do { \ + int retry = 100; \ struct lockref old; \ BUILD_BUG_ON(sizeof(old) != 8); \ old.lock_count = READ_ONCE(lockref->lock_count); \ @@ -21,6 +22,8 @@ if (likely(old.lock_count == prev.lock_count)) { \ SUCCESS; \ } \ + if (!--retry) \ + break; \ cpu_relax(); \ } \ } while (0) |