diff options
| author | Cedric Le Goater <[email protected]> | 2006-10-02 02:19:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2006-10-02 07:57:25 -0700 |
| commit | 9ec52099e4b8678a60e9f93e41ad87885d64f3e6 (patch) | |
| tree | a68fe051b39f8f8e8be469cbd3c2f653b9b71a9d /arch/mips/sgi-ip22/ip22-reset.c | |
| parent | 1a657f78dcc8ea7c53eaa1f2a45ea2315738c15f (diff) | |
[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.
[[email protected]: cleanups, build fix]
Signed-off-by: Cedric Le Goater <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Paul Mackerras <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'arch/mips/sgi-ip22/ip22-reset.c')
| -rw-r--r-- | arch/mips/sgi-ip22/ip22-reset.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/sgi-ip22/ip22-reset.c b/arch/mips/sgi-ip22/ip22-reset.c index 8134220ed600..7a941ecff3bb 100644 --- a/arch/mips/sgi-ip22/ip22-reset.c +++ b/arch/mips/sgi-ip22/ip22-reset.c @@ -123,7 +123,8 @@ static inline void power_button(void) if (machine_state & MACHINE_PANICED) return; - if ((machine_state & MACHINE_SHUTTING_DOWN) || kill_proc(1,SIGINT,1)) { + if ((machine_state & MACHINE_SHUTTING_DOWN) || + kill_cad_pid(SIGINT, 1)) { /* No init process or button pressed twice. */ sgi_machine_power_off(); } |