diff options
author | Eric W. Biederman <ebiederm@xmission.com> | 2007-02-10 09:44:34 (GMT) |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-11 18:51:24 (GMT) |
commit | 8b6312f4dcc1efe7975731b6c47dd134282bd9ac (patch) | |
tree | 71c94b01bda940c5610d448d0f4a2aa3c7665b4c /drivers/char/keyboard.c | |
parent | 0a7b35cb18c52d651f6ed9cd59edc979200ab880 (diff) | |
download | linux-8b6312f4dcc1efe7975731b6c47dd134282bd9ac.tar.xz |
[PATCH] vt: refactor console SAK processing
This does several things.
- It moves looking up of the current foreground console into process
context where we can safely take the semaphore that protects this
operation.
- It uses the new flavor of work queue processing.
- This generates a factor of do_SAK, __do_SAK that runs immediately.
- This calls __do_SAK with the console semaphore held ensuring nothing
else happens to the console while we process the SAK operation.
- With the console SAK processing moved into process context this
patch removes the xchg operations that I used to attempt to attomically
update struct pid, because of the strange locking used in the SAK processing.
With SAK using the normal console semaphore nothing special is needed.
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/keyboard.c')
-rw-r--r-- | drivers/char/keyboard.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c index 7a6c1c0..c654a3e 100644 --- a/drivers/char/keyboard.c +++ b/drivers/char/keyboard.c @@ -595,15 +595,9 @@ static void fn_spawn_con(struct vc_data *vc) static void fn_SAK(struct vc_data *vc) { - struct tty_struct *tty = vc->vc_tty; - - /* - * SAK should also work in all raw modes and reset - * them properly. - */ - if (tty) - do_SAK(tty); - reset_vc(vc); + struct work_struct *SAK_work = &vc_cons[fg_console].SAK_work; + PREPARE_WORK(SAK_work, vc_SAK); + schedule_work(SAK_work); } static void fn_null(struct vc_data *vc) |