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authorChristoph Hellwig <hch@lst.de>2006-07-10 04:45:37 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-10 13:24:26 -0700
commit5c318bef5f61baf6bbda2dcfe8c2ef71007c7fea (patch)
tree3a477d54979e26a0f21921703740df6436e0578c /drivers
parentbabcfade47371eea81fd7f24d892b5ff5b1786ea (diff)
[PATCH] snsc: switch from force_sig to kill_proc
Currently the snsc driver uses force_sig to send init a SIGPWR when the system overheats. This patch switches it to kill_proc instead which has the following advantages: (1) gets rid of one of the last remaining tasklist_lock users in modular code (2) simplifies the snsc code significantly The downside is that an init implementation could in theory block SIGPWR and it would not get delivered. The sysvinit code used by all major distributions doesn't do this and blocking this signal in init would be a rather stupid thing to do. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/char/snsc_event.c15
1 files changed, 1 insertions, 14 deletions
diff --git a/drivers/char/snsc_event.c b/drivers/char/snsc_event.c
index 8b2210b633d..d12d4f629ce 100644
--- a/drivers/char/snsc_event.c
+++ b/drivers/char/snsc_event.c
@@ -220,20 +220,7 @@ scdrv_dispatch_event(char *event, int len)
" Sending SIGPWR to init...\n");
/* give a SIGPWR signal to init proc */
-
- /* first find init's task */
- read_lock(&tasklist_lock);
- for_each_process(p) {
- if (p->pid == 1)
- break;
- }
- if (p) {
- force_sig(SIGPWR, p);
- } else {
- printk(KERN_ERR "Failed to signal init!\n");
- snsc_shutting_down = 0; /* so can try again (?) */
- }
- read_unlock(&tasklist_lock);
+ kill_proc(1, SIGPWR, 0);
} else {
/* print to system log */
printk("%s|$(0x%x)%s\n", severity, esp_code, desc);