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get rid of pipe->inode 

it's used only as a flag to distinguish normal pipes/FIFOs from the
internal per-task one used by file-to-file splice.  And pipe->files
would work just as well for that purpose...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-03-21 11:01:38 -04:00
parent ebec73f475
commit 6447a3cf19
4 changed files with 5 additions and 8 deletions
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2
fs/fuse/dev.c
View File

@ -1319,7 +1319,7 @@ static ssize_t fuse_dev_splice_read(struct file *in, loff_t *ppos,
page_nr++;
ret += buf->len;
if (pipe->inode)
if (pipe->files)
do_wakeup = 1;
}

5
fs/pipe.c
View File

@ -55,7 +55,7 @@ unsigned int pipe_min_size = PAGE_SIZE;
static void pipe_lock_nested(struct pipe_inode_info *pipe, int subclass)
{
if (pipe->inode)
if (pipe->files)
mutex_lock_nested(&pipe->mutex, subclass);
}
@ -70,7 +70,7 @@ EXPORT_SYMBOL(pipe_lock);
void pipe_unlock(struct pipe_inode_info *pipe)
{
if (pipe->inode)
if (pipe->files)
mutex_unlock(&pipe->mutex);
}
EXPORT_SYMBOL(pipe_unlock);
@ -785,7 +785,6 @@ struct pipe_inode_info * alloc_pipe_info(struct inode *inode)
if (pipe->bufs) {
init_waitqueue_head(&pipe->wait);
pipe->r_counter = pipe->w_counter = 1;
pipe->inode = inode;
pipe->buffers = PIPE_DEF_BUFFERS;
mutex_init(&pipe->mutex);
return pipe;

4
fs/splice.c
View File

@ -218,7 +218,7 @@ ssize_t splice_to_pipe(struct pipe_inode_info *pipe,
page_nr++;
ret += buf->len;
if (pipe->inode)
if (pipe->files)
do_wakeup = 1;
if (!--spd->nr_pages)
@ -828,7 +828,7 @@ int splice_from_pipe_feed(struct pipe_inode_info *pipe, struct splice_desc *sd,
ops->release(pipe, buf);
pipe->curbuf = (pipe->curbuf + 1) & (pipe->buffers - 1);
pipe->nrbufs--;
if (pipe->inode)
if (pipe->files)
sd->need_wakeup = true;
}

2
include/linux/pipe_fs_i.h
View File

@ -41,7 +41,6 @@ struct pipe_buffer {
* @w_counter: writer counter
* @fasync_readers: reader side fasync
* @fasync_writers: writer side fasync
* @inode: inode this pipe is attached to
* @bufs: the circular array of pipe buffers
**/
struct pipe_inode_info {
@ -57,7 +56,6 @@ struct pipe_inode_info {
struct page *tmp_page;
struct fasync_struct *fasync_readers;
struct fasync_struct *fasync_writers;
struct inode *inode;
struct pipe_buffer *bufs;
};