tmpfs: clone shmem_file_splice_read()
Copy __generic_file_splice_read() and generic_file_splice_read() from
fs/splice.c to shmem_file_splice_read() in mm/shmem.c. Make
page_cache_pipe_buf_ops and spd_release_page() accessible to it.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/splice.h b/include/linux/splice.h
index 997c3b4..26e5b61 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
@@ -88,5 +88,7 @@
extern int splice_grow_spd(struct pipe_inode_info *, struct splice_pipe_desc *);
extern void splice_shrink_spd(struct pipe_inode_info *,
struct splice_pipe_desc *);
+extern void spd_release_page(struct splice_pipe_desc *, unsigned int);
+extern const struct pipe_buf_operations page_cache_pipe_buf_ops;
#endif