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author | Cedric Le Goater <clg@fr.ibm.com> | 2006-10-02 02:19:00 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-02 07:57:25 -0700 |
commit | 9ec52099e4b8678a60e9f93e41ad87885d64f3e6 (patch) | |
tree | a68fe051b39f8f8e8be469cbd3c2f653b9b71a9d /drivers/s390/s390mach.c | |
parent | 1a657f78dcc8ea7c53eaa1f2a45ea2315738c15f (diff) | |
download | linux-9ec52099e4b8678a60e9f93e41ad87885d64f3e6.tar.gz |
[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/s390mach.c')
-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 |