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| author | Max Kellermann <max.kellermann@ionos.com> | 2023-09-21 10:57:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-01 03:19:09 +0300 |
| commit | 67f457955ba86191130ec62814ea0cea1b9cd964 (patch) | |
| tree | f271d7a5f27ee090d894faee637c38d8cbbe7d94 /include | |
| parent | 019ccc66d56a696a4dfee3bfa2f04d0a7c3d89ee (diff) | |
| download | linux-67f457955ba86191130ec62814ea0cea1b9cd964.tar.xz | |
fs/pipe: move check to pipe_has_watch_queue()
[ Upstream commit b4bd6b4bac8edd61eb8f7b836969d12c0c6af165 ]
This declutters the code by reducing the number of #ifdefs and makes
the watch_queue checks simpler. This has no runtime effect; the
machine code is identical.
Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Message-Id: <20230921075755.1378787-2-max.kellermann@ionos.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Stable-dep-of: e95aada4cb93 ("pipe: wakeup wr_wait after setting max_usage")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pipe_fs_i.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index 608a9eb86bff..288a8081a9db 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -125,6 +125,22 @@ struct pipe_buf_operations { }; /** + * pipe_has_watch_queue - Check whether the pipe is a watch_queue, + * i.e. it was created with O_NOTIFICATION_PIPE + * @pipe: The pipe to check + * + * Return: true if pipe is a watch queue, false otherwise. + */ +static inline bool pipe_has_watch_queue(const struct pipe_inode_info *pipe) +{ +#ifdef CONFIG_WATCH_QUEUE + return pipe->watch_queue != NULL; +#else + return false; +#endif +} + +/** * pipe_empty - Return true if the pipe is empty * @head: The pipe ring head pointer * @tail: The pipe ring tail pointer |