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authorJens Axboe <jens.axboe@oracle.com>2007-06-12 20:51:32 +0200
committerJens Axboe <jens.axboe@oracle.com>2007-07-10 08:04:16 +0200
commit0845718dafea3e16041d270c256e8516acf4e13d (patch)
tree5b572e9bf4a13e05d0c3a9b8c36745ef06a92d58 /fs/splice.c
parentcac36bb06efe4880234524e117e0e712b10b1f16 (diff)
downloadop-kernel-dev-0845718dafea3e16041d270c256e8516acf4e13d.zip
op-kernel-dev-0845718dafea3e16041d270c256e8516acf4e13d.tar.gz
pipe: add documentation and comments
As per Andrew Mortons request, here's a set of documentation for the generic pipe_buf_operations hooks, the pipe, and pipe_buffer structures. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'fs/splice.c')
-rw-r--r--fs/splice.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/splice.c b/fs/splice.c
index c8041216..ed2ce99 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -85,6 +85,10 @@ static void page_cache_pipe_buf_release(struct pipe_inode_info *pipe,
buf->flags &= ~PIPE_BUF_FLAG_LRU;
}
+/*
+ * Check whether the contents of buf is OK to access. Since the content
+ * is a page cache page, IO may be in flight.
+ */
static int page_cache_pipe_buf_confirm(struct pipe_inode_info *pipe,
struct pipe_buffer *buf)
{
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