The patch titled
snsc: switch from force_sig to kill_proc
has been added to the -mm tree. Its filename is
snsc-switch-from-force_sig-to-kill_proc.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: snsc: switch from force_sig to kill_proc
From: Christoph Hellwig <hch@xxxxxx>
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@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/char/snsc_event.c | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
diff -puN drivers/char/snsc_event.c~snsc-switch-from-force_sig-to-kill_proc drivers/char/snsc_event.c
--- a/drivers/char/snsc_event.c~snsc-switch-from-force_sig-to-kill_proc
+++ a/drivers/char/snsc_event.c
@@ -220,20 +220,7 @@ scdrv_dispatch_event(char *event, int le
" 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);
_
Patches currently in -mm which might be from hch@xxxxxx are
areca-raid-linux-scsi-driver.patch
add-address_space_operationsbatch_write.patch
add-address_space_operationsbatch_write-tidy.patch
snsc-switch-from-force_sig-to-kill_proc.patch
task-watchers-task-watchers.patch
ecryptfs-mmap-operations.patch
ecryptfs-dont-muck-with-the-existing-nameidata-structures.patch
-
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