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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-08 04:21:35 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-08 04:21:35 +0000 |
| commit | 7b642cd94bb96385cbdbb36a1952f129af6b1bbb (patch) | |
| tree | e7c4209372da8a2fa745aaa3e99d062e54d0f556 /fs/eventfd.c | |
| parent | Adding debian version 4.19.289-2. (diff) | |
| download | linux-7b642cd94bb96385cbdbb36a1952f129af6b1bbb.tar.xz linux-7b642cd94bb96385cbdbb36a1952f129af6b1bbb.zip | |
Merging upstream version 4.19.304.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/eventfd.c')
| -rw-r--r-- | fs/eventfd.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/eventfd.c b/fs/eventfd.c index ce1d1711f..66864100b 100644 --- a/fs/eventfd.c +++ b/fs/eventfd.c @@ -174,11 +174,14 @@ 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) { - *cnt = (ctx->flags & EFD_SEMAPHORE) ? 1 : ctx->count; + lockdep_assert_held(&ctx->wqh.lock); + + *cnt = ((ctx->flags & EFD_SEMAPHORE) && ctx->count) ? 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. |