diff options
Diffstat (limited to 'fs/eventfd.c')
-rw-r--r-- | fs/eventfd.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/eventfd.c b/fs/eventfd.c index 4a14295cffe0..b8d38b970ce7 100644 --- a/fs/eventfd.c +++ b/fs/eventfd.c @@ -187,11 +187,14 @@ static __poll_t eventfd_poll(struct file *file, poll_table *wait) return events; } -static void eventfd_ctx_do_read(struct eventfd_ctx *ctx, __u64 *cnt) +void eventfd_ctx_do_read(struct eventfd_ctx *ctx, __u64 *cnt) { + lockdep_assert_held(&ctx->wqh.lock); + *cnt = (ctx->flags & EFD_SEMAPHORE) ? 1 : ctx->count; ctx->count -= *cnt; } +EXPORT_SYMBOL_GPL(eventfd_ctx_do_read); /** * eventfd_ctx_remove_wait_queue - Read the current counter and removes wait queue. |