From a6752f3f538e9dc0d0e7fdb2080532554a5eb395 Mon Sep 17 00:00:00 2001 From: Daniel Walker Date: Wed, 6 Feb 2008 01:37:32 -0800 Subject: [PATCH] unix98 allocated_ptys_lock semaphore to mutex Convert the unix98 allocated_ptys_lock to a mutex. Signed-off-by: Daniel Walker Acked-by: Ingo Molnar Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/tty_io.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index b62bb67c3414..79c86c47947f 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -138,7 +138,7 @@ EXPORT_SYMBOL(tty_mutex); extern struct tty_driver *ptm_driver; /* Unix98 pty masters; for /dev/ptmx */ extern int pty_limit; /* Config limit on Unix98 ptys */ static DEFINE_IDR(allocated_ptys); -static DECLARE_MUTEX(allocated_ptys_lock); +static DEFINE_MUTEX(allocated_ptys_lock); static int ptmx_open(struct inode *, struct file *); #endif @@ -2571,9 +2571,9 @@ static void release_dev(struct file * filp) #ifdef CONFIG_UNIX98_PTYS /* Make this pty number available for reallocation */ if (devpts) { - down(&allocated_ptys_lock); + mutex_lock(&allocated_ptys_lock); idr_remove(&allocated_ptys, idx); - up(&allocated_ptys_lock); + mutex_unlock(&allocated_ptys_lock); } #endif @@ -2737,24 +2737,24 @@ static int ptmx_open(struct inode * inode, struct file * filp) nonseekable_open(inode, filp); /* find a device that is not in use. */ - down(&allocated_ptys_lock); + mutex_lock(&allocated_ptys_lock); if (!idr_pre_get(&allocated_ptys, GFP_KERNEL)) { - up(&allocated_ptys_lock); + mutex_unlock(&allocated_ptys_lock); return -ENOMEM; } idr_ret = idr_get_new(&allocated_ptys, NULL, &index); if (idr_ret < 0) { - up(&allocated_ptys_lock); + mutex_unlock(&allocated_ptys_lock); if (idr_ret == -EAGAIN) return -ENOMEM; return -EIO; } if (index >= pty_limit) { idr_remove(&allocated_ptys, index); - up(&allocated_ptys_lock); + mutex_unlock(&allocated_ptys_lock); return -EIO; } - up(&allocated_ptys_lock); + mutex_unlock(&allocated_ptys_lock); mutex_lock(&tty_mutex); retval = init_dev(ptm_driver, index, &tty); @@ -2781,9 +2781,9 @@ out1: release_dev(filp); return retval; out: - down(&allocated_ptys_lock); + mutex_lock(&allocated_ptys_lock); idr_remove(&allocated_ptys, index); - up(&allocated_ptys_lock); + mutex_unlock(&allocated_ptys_lock); return retval; } #endif -- 2.30.2