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| author |   Cedric Le Goater <clg@fr.ibm.com> | 2006-10-02 02:19:00 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-02 07:57:25 -0700 |
| commit | 9ec52099e4b8678a60e9f93e41ad87885d64f3e6 (patch) | |
| tree | a68fe051b39f8f8e8be469cbd3c2f653b9b71a9d /arch/powerpc/platforms | |
| parent | [PATCH] introduce get_task_pid() to fix unsafe get_pid() (diff) | |
| download | linux-dev-9ec52099e4b8678a60e9f93e41ad87885d64f3e6.tar.xz linux-dev-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 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/iseries/mf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/iseries/mf.c b/arch/powerpc/platforms/iseries/mf.c index 1a2c2a50f922..1983b640bac1 100644 --- a/arch/powerpc/platforms/iseries/mf.c +++ b/arch/powerpc/platforms/iseries/mf.c @@ -357,7 +357,7 @@ static int dma_and_signal_ce_msg(char *ce_msg, */ static int shutdown(void) { - int rc = kill_proc(1, SIGINT, 1); + int rc = kill_cad_pid(SIGINT, 1); if (rc) { printk(KERN_ALERT "mf.c: SIGINT to init failed (%d), " |