pipe: add pipe_buf_steal() helper
Signed-off-by: Miklos Szeredi <[email protected]>
Signed-off-by: Al Viro <[email protected]>
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index 6544133..bddccf0 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -151,6 +151,17 @@
return buf->ops->confirm(pipe, buf);
}
+/**
+ * pipe_buf_steal - attempt to take ownership of a pipe_buffer
+ * @pipe: the pipe that the buffer belongs to
+ * @buf: the buffer to attempt to steal
+ */
+static inline int pipe_buf_steal(struct pipe_inode_info *pipe,
+ struct pipe_buffer *buf)
+{
+ return buf->ops->steal(pipe, buf);
+}
+
/* Differs from PIPE_BUF in that PIPE_SIZE is the length of the actual
memory allocation, whereas PIPE_BUF makes atomicity guarantees. */
#define PIPE_SIZE PAGE_SIZE
