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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-15 15:44:51 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-15 15:44:51 +1000 |
| commit | 43d2548bb2ef7e6d753f91468a746784041e522d (patch) | |
| tree | 77d13fcd48fd998393abb825ec36e2b732684a73 /drivers/char/tty_io.c | |
| parent | 585583d95c5660973bc0cf64add517b040acd8a4 (diff) | |
| parent | 85082fd7cbe3173198aac0eb5e85ab1edcc6352c (diff) | |
Merge commit '85082fd7cbe3173198aac0eb5e85ab1edcc6352c' into test-build
Manual fixup of:
arch/powerpc/Kconfig
Diffstat (limited to 'drivers/char/tty_io.c')
| -rw-r--r-- | drivers/char/tty_io.c | 41 |
1 files changed, 34 insertions, 7 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 750131010af0..047a17339f83 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -2665,7 +2665,7 @@ static void release_dev(struct file *filp) * ->siglock protects ->signal/->sighand */ -static int tty_open(struct inode *inode, struct file *filp) +static int __tty_open(struct inode *inode, struct file *filp) { struct tty_struct *tty; int noctty, retval; @@ -2779,6 +2779,19 @@ got_driver: return 0; } +/* BKL pushdown: scary code avoidance wrapper */ +static int tty_open(struct inode *inode, struct file *filp) +{ + int ret; + + lock_kernel(); + ret = __tty_open(inode, filp); + unlock_kernel(); + return ret; +} + + + #ifdef CONFIG_UNIX98_PTYS /** * ptmx_open - open a unix 98 pty master @@ -2792,7 +2805,7 @@ got_driver: * allocated_ptys_lock handles the list of free pty numbers */ -static int ptmx_open(struct inode *inode, struct file *filp) +static int __ptmx_open(struct inode *inode, struct file *filp) { struct tty_struct *tty; int retval; @@ -2831,6 +2844,16 @@ out: devpts_kill_index(index); return retval; } + +static int ptmx_open(struct inode *inode, struct file *filp) +{ + int ret; + + lock_kernel(); + ret = __ptmx_open(inode, filp); + unlock_kernel(); + return ret; +} #endif /** @@ -2886,15 +2909,16 @@ static int tty_fasync(int fd, struct file *filp, int on) { struct tty_struct *tty; unsigned long flags; - int retval; + int retval = 0; + lock_kernel(); tty = (struct tty_struct *)filp->private_data; if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_fasync")) - return 0; + goto out; retval = fasync_helper(fd, filp, on, &tty->fasync); if (retval <= 0) - return retval; + goto out; if (on) { enum pid_type type; @@ -2912,12 +2936,15 @@ static int tty_fasync(int fd, struct file *filp, int on) spin_unlock_irqrestore(&tty->ctrl_lock, flags); retval = __f_setown(filp, pid, type, 0); if (retval) - return retval; + goto out; } else { if (!tty->fasync && !waitqueue_active(&tty->read_wait)) tty->minimum_to_wake = N_TTY_BUF_SIZE; } - return 0; + retval = 0; +out: + unlock_kernel(); + return retval; } /** |