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>

4 files changed, 5 insertions, 8 deletions

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 11dfa0c3fb46..9bfd1a3214e6 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -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;
         }
 
diff --git a/fs/pipe.c b/fs/pipe.c
index e2fc5ccb0d49..39bdec06fe2b 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -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;
diff --git a/fs/splice.c b/fs/splice.c
index 7efc2f5057fb..9f2a4447da50 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -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;
                 }
 
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index d803a85a64b6..ed8eeeb10811 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -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;
 };