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authorCedric Le Goater <clg@fr.ibm.com>2006-10-02 05:19:00 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-02 10:57:25 -0400
commit9ec52099e4b8678a60e9f93e41ad87885d64f3e6 (patch)
treea68fe051b39f8f8e8be469cbd3c2f653b9b71a9d /arch/mips/sgi-ip22
parent1a657f78dcc8ea7c53eaa1f2a45ea2315738c15f (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. [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 'arch/mips/sgi-ip22')
-rw-r--r--arch/mips/sgi-ip22/ip22-reset.c3
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)
123 if (machine_state & MACHINE_PANICED) 123 if (machine_state & MACHINE_PANICED)
124 return; 124 return;
125 125
126 if ((machine_state & MACHINE_SHUTTING_DOWN) || kill_proc(1,SIGINT,1)) { 126 if ((machine_state & MACHINE_SHUTTING_DOWN) ||
127 kill_cad_pid(SIGINT, 1)) {
127 /* No init process or button pressed twice. */ 128 /* No init process or button pressed twice. */
128 sgi_machine_power_off(); 129 sgi_machine_power_off();
129 } 130 }