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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2008-07-25 01:45:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-25 10:53:28 -0700
commitac331d158e198d2a91a5b0a3ec4ca9991fdb57af (patch)
treeb0921e2bc8e59d5df2c554c41c3b9f04e05d6d7c /kernel/sys.c
parentf557d0996a6f9c06912528ea85e1dba0fb7d485f (diff)
downloadlwn-ac331d158e198d2a91a5b0a3ec4ca9991fdb57af.tar.gz
lwn-ac331d158e198d2a91a5b0a3ec4ca9991fdb57af.zip
call_usermodehelper(): increase reliability
Presently call_usermodehelper_setup() uses GFP_ATOMIC. but it can return NULL _very_ easily. GFP_ATOMIC is needed only when we can't sleep. and, GFP_KERNEL is robust and better. thus, I add gfp_mask argument to call_usermodehelper_setup(). So, its callers pass the gfp_t as below: call_usermodehelper() and call_usermodehelper_keys(): depend on 'wait' argument. call_usermodehelper_pipe(): always GFP_KERNEL because always run under process context. orderly_poweroff(): pass to GFP_ATOMIC because may run under interrupt context. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: "Paul Menage" <menage@google.com> Reviewed-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sys.c')
-rw-r--r--kernel/sys.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index 14e97282eb6c..6c2188046048 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1795,7 +1795,7 @@ int orderly_poweroff(bool force)
goto out;
}
- info = call_usermodehelper_setup(argv[0], argv, envp);
+ info = call_usermodehelper_setup(argv[0], argv, envp, GFP_ATOMIC);
if (info == NULL) {
argv_free(argv);
goto out;