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authorChristoph Hellwig <hch@lst.de>2020-05-20 18:58:14 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2020-05-20 19:11:26 +0300
commit76887c256744740d6121af9bc4aa787712a1f694 (patch)
treea55b809de66779126d5821d90c35679c312875df /include/linux/pipe_fs_i.h
parent6797d97ab9d1b0ef94bf6063920669409dc2d730 (diff)
downloadlinux-76887c256744740d6121af9bc4aa787712a1f694.tar.xz
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.h3
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;