From 923f4f23940d2361e8d5c4245982163a8e9d1c91 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Tue, 11 Apr 2006 13:53:33 +0200 Subject: [PATCH] pipe.c/fifo.c code cleanups more code cleanups after the macro conversion: - standardize on 'struct pipe_inode_info *pipe' variable names - introduce 'pipe' temporaries to reduce mass inode->i_pipe dereferencing Signed-off-by: Ingo Molnar Signed-off-by: Jens Axboe --- fs/fifo.c | 49 ++++++++++++++++++++++++++----------------------- 1 file changed, 26 insertions(+), 23 deletions(-) (limited to 'fs/fifo.c') diff --git a/fs/fifo.c b/fs/fifo.c index 2c27f56d7304..49035b174b48 100644 --- a/fs/fifo.c +++ b/fs/fifo.c @@ -33,14 +33,17 @@ static void wake_up_partner(struct inode* inode) static int fifo_open(struct inode *inode, struct file *filp) { + struct pipe_inode_info *pipe; int ret; mutex_lock(&inode->i_mutex); - if (!inode->i_pipe) { + pipe = inode->i_pipe; + if (!pipe) { ret = -ENOMEM; - inode->i_pipe = alloc_pipe_info(inode); - if (!inode->i_pipe) + pipe = alloc_pipe_info(inode); + if (!pipe) goto err_nocleanup; + inode->i_pipe = pipe; } filp->f_version = 0; @@ -55,18 +58,18 @@ static int fifo_open(struct inode *inode, struct file *filp) * opened, even when there is no process writing the FIFO. */ filp->f_op = &read_fifo_fops; - inode->i_pipe->r_counter++; - if (inode->i_pipe->readers++ == 0) + pipe->r_counter++; + if (pipe->readers++ == 0) wake_up_partner(inode); - if (!inode->i_pipe->writers) { + if (!pipe->writers) { if ((filp->f_flags & O_NONBLOCK)) { /* suppress POLLHUP until we have * seen a writer */ - filp->f_version = inode->i_pipe->w_counter; + filp->f_version = pipe->w_counter; } else { - wait_for_partner(inode, &inode->i_pipe->w_counter); + wait_for_partner(inode, &pipe->w_counter); if(signal_pending(current)) goto err_rd; } @@ -80,16 +83,16 @@ static int fifo_open(struct inode *inode, struct file *filp) * errno=ENXIO when there is no process reading the FIFO. */ ret = -ENXIO; - if ((filp->f_flags & O_NONBLOCK) && !inode->i_pipe->readers) + if ((filp->f_flags & O_NONBLOCK) && !pipe->readers) goto err; filp->f_op = &write_fifo_fops; - inode->i_pipe->w_counter++; - if (!inode->i_pipe->writers++) + pipe->w_counter++; + if (!pipe->writers++) wake_up_partner(inode); - if (!inode->i_pipe->readers) { - wait_for_partner(inode, &inode->i_pipe->r_counter); + if (!pipe->readers) { + wait_for_partner(inode, &pipe->r_counter); if (signal_pending(current)) goto err_wr; } @@ -104,11 +107,11 @@ static int fifo_open(struct inode *inode, struct file *filp) */ filp->f_op = &rdwr_fifo_fops; - inode->i_pipe->readers++; - inode->i_pipe->writers++; - inode->i_pipe->r_counter++; - inode->i_pipe->w_counter++; - if (inode->i_pipe->readers == 1 || inode->i_pipe->writers == 1) + pipe->readers++; + pipe->writers++; + pipe->r_counter++; + pipe->w_counter++; + if (pipe->readers == 1 || pipe->writers == 1) wake_up_partner(inode); break; @@ -122,19 +125,19 @@ static int fifo_open(struct inode *inode, struct file *filp) return 0; err_rd: - if (!--inode->i_pipe->readers) - wake_up_interruptible(&inode->i_pipe->wait); + if (!--pipe->readers) + wake_up_interruptible(&pipe->wait); ret = -ERESTARTSYS; goto err; err_wr: - if (!--inode->i_pipe->writers) - wake_up_interruptible(&inode->i_pipe->wait); + if (!--pipe->writers) + wake_up_interruptible(&pipe->wait); ret = -ERESTARTSYS; goto err; err: - if (!inode->i_pipe->readers && !inode->i_pipe->writers) + if (!pipe->readers && !pipe->writers) free_pipe_info(inode); err_nocleanup: -- cgit v1.2.1