diff options
| -rw-r--r-- | kernel/ucount.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/kernel/ucount.c b/kernel/ucount.c index f629db485a07..586af49fc03e 100644 --- a/kernel/ucount.c +++ b/kernel/ucount.c @@ -201,16 +201,14 @@ void put_ucounts(struct ucounts *ucounts) static inline bool atomic_long_inc_below(atomic_long_t *v, long u) { - long c, old; - c = atomic_long_read(v); - for (;;) { + long c = atomic_long_read(v); + + do { if (unlikely(c >= u)) return false; - old = atomic_long_cmpxchg(v, c, c+1); - if (likely(old == c)) - return true; - c = old; - } + } while (!atomic_long_try_cmpxchg(v, &c, c+1)); + + return true; } struct ucounts *inc_ucount(struct user_namespace *ns, kuid_t uid, |