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| author | Christoph Hellwig <hch@lst.de> | 2020-05-20 17:58:14 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-05-20 12:11:26 -0400 |
| commit | 76887c256744740d6121af9bc4aa787712a1f694 (patch) | |
| tree | a55b809de66779126d5821d90c35679c312875df /include/linux/pipe_fs_i.h | |
| parent | 6797d97ab9d1b0ef94bf6063920669409dc2d730 (diff) | |
| download | lwn-76887c256744740d6121af9bc4aa787712a1f694.tar.gz lwn-76887c256744740d6121af9bc4aa787712a1f694.zip | |
fs: make the pipe_buf_operations ->steal operation optional
Just return 1 for failure if it is not present.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/pipe_fs_i.h')
| -rw-r--r-- | include/linux/pipe_fs_i.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index 3f7b07b38824..e022b2459301 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -206,6 +206,8 @@ static inline int pipe_buf_confirm(struct pipe_inode_info *pipe, static inline int pipe_buf_steal(struct pipe_inode_info *pipe, struct pipe_buffer *buf) { + if (!buf->ops->steal) + return 1; return buf->ops->steal(pipe, buf); } @@ -232,7 +234,6 @@ void free_pipe_info(struct pipe_inode_info *); bool generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *); int generic_pipe_buf_confirm(struct pipe_inode_info *, struct pipe_buffer *); int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *); -int generic_pipe_buf_nosteal(struct pipe_inode_info *, struct pipe_buffer *); void generic_pipe_buf_release(struct pipe_inode_info *, struct pipe_buffer *); extern const struct pipe_buf_operations nosteal_pipe_buf_ops; |