diff options
| author | Dipankar Sarma <dipankar@in.ibm.com> | 2005-09-10 00:04:14 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-10 00:57:55 +0400 |
| commit | b835996f628eadb55c5fb222ba46fe9395bf73c7 (patch) | |
| tree | d63d80585d197e1ffc299af4a0034049790fb197 /drivers/char/tty_io.c | |
| parent | ab2af1f5005069321c5d130f09cce577b03f43ef (diff) | |
| download | linux-b835996f628eadb55c5fb222ba46fe9395bf73c7.tar.xz | |
[PATCH] files: lock-free fd look-up
With the use of RCU in files structure, the look-up of files using fds can now
be lock-free. The lookup is protected by rcu_read_lock()/rcu_read_unlock().
This patch changes the readers to use lock-free lookup.
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Ravikiran Thirumalai <kiran_th@gmail.com>
Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char/tty_io.c')
| -rw-r--r-- | drivers/char/tty_io.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 0bfc7af68917..e5953f3433f3 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -2480,7 +2480,7 @@ static void __do_SAK(void *arg) } task_lock(p); if (p->files) { - spin_lock(&p->files->file_lock); + rcu_read_lock(); fdt = files_fdtable(p->files); for (i=0; i < fdt->max_fds; i++) { filp = fcheck_files(p->files, i); @@ -2495,7 +2495,7 @@ static void __do_SAK(void *arg) break; } } - spin_unlock(&p->files->file_lock); + rcu_read_unlock(); } task_unlock(p); } while_each_task_pid(session, PIDTYPE_SID, p); |