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Subject[PATCH] splice: add wakeup_pipe_readers()
Date
Add and use wakeup_pipe_readers() to consolidate duplicated codes.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
---
fs/splice.c | 33 +++++++++++++++------------------
1 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/fs/splice.c b/fs/splice.c
index 50a5d978da16..aa866d309695 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -162,6 +162,14 @@ static const struct pipe_buf_operations user_page_pipe_buf_ops = {
.get = generic_pipe_buf_get,
};

+static void wakeup_pipe_readers(struct pipe_inode_info *pipe)
+{
+ smp_mb();
+ if (waitqueue_active(&pipe->wait))
+ wake_up_interruptible(&pipe->wait);
+ kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN);
+}
+
/**
* splice_to_pipe - fill passed data into a pipe
* @pipe: pipe to fill
@@ -247,12 +255,8 @@ ssize_t splice_to_pipe(struct pipe_inode_info *pipe,

pipe_unlock(pipe);

- if (do_wakeup) {
- smp_mb();
- if (waitqueue_active(&pipe->wait))
- wake_up_interruptible(&pipe->wait);
- kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN);
- }
+ if (do_wakeup)
+ wakeup_pipe_readers(pipe);

while (page_nr < spd_pages)
spd->spd_release(spd, page_nr++);
@@ -1892,12 +1896,9 @@ retry:
/*
* If we put data in the output pipe, wakeup any potential readers.
*/
- if (ret > 0) {
- smp_mb();
- if (waitqueue_active(&opipe->wait))
- wake_up_interruptible(&opipe->wait);
- kill_fasync(&opipe->fasync_readers, SIGIO, POLL_IN);
- }
+ if (ret > 0)
+ wakeup_pipe_readers(opipe);
+
if (input_wakeup)
wakeup_pipe_writers(ipipe);

@@ -1976,12 +1977,8 @@ static int link_pipe(struct pipe_inode_info *ipipe,
/*
* If we put data in the output pipe, wakeup any potential readers.
*/
- if (ret > 0) {
- smp_mb();
- if (waitqueue_active(&opipe->wait))
- wake_up_interruptible(&opipe->wait);
- kill_fasync(&opipe->fasync_readers, SIGIO, POLL_IN);
- }
+ if (ret > 0)
+ wakeup_pipe_readers(opipe);

return ret;
}
--
1.7.5


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