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tmpfs: clone shmem_file_splice_read()

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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>
This commit is contained in:
Hugh Dickins 2011-07-25 17:12:32 -07:00 • committed by Linus Torvalds
parent 2efaca927f
commit 708e3508c2
3 changed files with 221 additions and 3 deletions
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2
include/linux/splice.h
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@ -88,5 +88,7 @@ extern ssize_t splice_direct_to_actor(struct file *, struct splice_desc *,
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