| commit | 6698e34720660e18b45e2e3b115ee4584d0c3b5e | |
| author | Alan Cox <alan@linux.intel.com> | |
| Sat, 12 Dec 2009 10:32:36 +0000 (12 10:32 +0000) | ||
| committer | Linus Torvalds <torvalds@linux-foundation.org> | |
| Sat, 12 Dec 2009 22:46:21 +0000 (12 14:46 -0800) | ||
| tree | 1e6e136d58a1f66928603f0e48cd8f163fef5196 | treesnapshot (tar.gz zip) |
| parent | 09cea96caa59fabab3030c53bd698b9b568d959a | commitdiff |
tty: Fix BKL taken under a spinlock bug introduced in the BKL split
The fasync path takes the BKL (it probably doesn't need to in fact)
while holding the file_list spinlock. You can't do that with the kernel
lock: it causes lock inversions and deadlocks.
Leave the BKL over that bit for the moment.
Identified by AKPM.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-and-Tested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The fasync path takes the BKL (it probably doesn't need to in fact)
while holding the file_list spinlock. You can't do that with the kernel
lock: it causes lock inversions and deadlocks.
Leave the BKL over that bit for the moment.
Identified by AKPM.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-and-Tested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| drivers/char/tty_io.c | diffblobblamehistory |