diff options
| author | Cedric Le Goater <clg@fr.ibm.com> | 2006-10-02 11:19:00 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-02 16:57:25 +0200 |
| commit | 9ec52099e4b8678a60e9f93e41ad87885d64f3e6 (patch) | |
| tree | a68fe051b39f8f8e8be469cbd3c2f653b9b71a9d /drivers/s390 | |
| parent | [PATCH] introduce get_task_pid() to fix unsafe get_pid() (diff) | |
| download | linux-9ec52099e4b8678a60e9f93e41ad87885d64f3e6.tar.xz linux-9ec52099e4b8678a60e9f93e41ad87885d64f3e6.zip | |
[PATCH] replace cad_pid by a struct pid
There are a few places in the kernel where the init task is signaled. The
ctrl+alt+del sequence is one them. It kills a task, usually init, using a
cached pid (cad_pid).
This patch replaces the pid_t by a struct pid to avoid pid wrap around
problem. The struct pid is initialized at boot time in init() and can be
modified through systctl with
/proc/sys/kernel/cad_pid
[ I haven't found any distro using it ? ]
It also introduces a small helper routine kill_cad_pid() which is used
where it seemed ok to use cad_pid instead of pid 1.
[akpm@osdl.org: cleanups, build fix]
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/s390mach.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/s390mach.c b/drivers/s390/s390mach.c index 479364d0332a..e088b5e28711 100644 --- a/drivers/s390/s390mach.c +++ b/drivers/s390/s390mach.c @@ -208,7 +208,7 @@ s390_handle_mcck(void) */ __ctl_clear_bit(14, 24); /* Disable WARNING MCH */ if (xchg(&mchchk_wng_posted, 1) == 0) - kill_proc(1, SIGPWR, 1); + kill_cad_pid(SIGPWR, 1); } #endif |