[PATCH] constify pipe_buf_operations

- pipe/splice should use const pipe_buf_operations and file_operations

- struct pipe_inode_info has an unused field "start" : get rid of it.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/fs/pipe.c b/fs/pipe.c
index f8b6bdcb879a..9a06e8e48e8d 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -207,7 +207,7 @@ int generic_pipe_buf_pin(struct pipe_inode_info *info, struct pipe_buffer *buf)
         return 0;
 }
 
-static struct pipe_buf_operations anon_pipe_buf_ops = {
+static const struct pipe_buf_operations anon_pipe_buf_ops = {
         .can_merge = 1,
         .map = generic_pipe_buf_map,
         .unmap = generic_pipe_buf_unmap,
@@ -243,7 +243,7 @@ pipe_read(struct kiocb *iocb, const struct iovec *_iov,
                 if (bufs) {
                         int curbuf = pipe->curbuf;
                         struct pipe_buffer *buf = pipe->bufs + curbuf;
-                        struct pipe_buf_operations *ops = buf->ops;
+                        const struct pipe_buf_operations *ops = buf->ops;
                         void *addr;
                         size_t chars = buf->len;
                         int error, atomic;
@@ -365,7 +365,7 @@ pipe_write(struct kiocb *iocb, const struct iovec *_iov,
                 int lastbuf = (pipe->curbuf + pipe->nrbufs - 1) &
                                                         (PIPE_BUFFERS-1);
                 struct pipe_buffer *buf = pipe->bufs + lastbuf;
-                struct pipe_buf_operations *ops = buf->ops;
+                const struct pipe_buf_operations *ops = buf->ops;
                 int offset = buf->offset + buf->len;
 
                 if (ops->can_merge && offset + chars <= PAGE_SIZE) {
@@ -756,7 +756,7 @@ const struct file_operations rdwr_fifo_fops = {
         .fasync         = pipe_rdwr_fasync,
 };
 
-static struct file_operations read_pipe_fops = {
+static const struct file_operations read_pipe_fops = {
         .llseek         = no_llseek,
         .read           = do_sync_read,
         .aio_read       = pipe_read,
@@ -768,7 +768,7 @@ static struct file_operations read_pipe_fops = {
         .fasync         = pipe_read_fasync,
 };
 
-static struct file_operations write_pipe_fops = {
+static const struct file_operations write_pipe_fops = {
         .llseek         = no_llseek,
         .read           = bad_pipe_r,
         .write          = do_sync_write,
@@ -780,7 +780,7 @@ static struct file_operations write_pipe_fops = {
         .fasync         = pipe_write_fasync,
 };
 
-static struct file_operations rdwr_pipe_fops = {
+static const struct file_operations rdwr_pipe_fops = {
         .llseek         = no_llseek,
         .read           = do_sync_read,
         .aio_read       = pipe_read,