usermodehelper: introduce umh_complete(sub_info)

commit b3449922 upstream

Preparation.  Add the new trivial helper, umh_complete().  Currently it
simply does complete(sub_info->complete).
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tejun Heo <tj@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[dannf: Adjusted to apply to Debian's 2.6.32]
Signed-off-by: Willy Tarreau <w@1wt.eu>

kernel/kmod.c

@@ -206,6 +206,11 @@ void call_usermodehelper_freeinfo(struct subprocess_info *info)
 }
 EXPORT_SYMBOL(call_usermodehelper_freeinfo);
 
+static void umh_complete(struct subprocess_info *sub_info)
+{
+	complete(sub_info->complete);
+}
+
 /* Keventd can't block, but this (a child) can. */
 static int wait_for_helper(void *data)
 {
@@ -245,7 +250,7 @@ static int wait_for_helper(void *data)
 	if (sub_info->wait == UMH_NO_WAIT)
 		call_usermodehelper_freeinfo(sub_info);
 	else
-		complete(sub_info->complete);
+		umh_complete(sub_info);
 	return 0;
 }
 
@@ -280,7 +285,7 @@ static void __call_usermodehelper(struct work_struct *work)
 		/* FALLTHROUGH */
 
 	case UMH_WAIT_EXEC:
-		complete(sub_info->complete);
+		umh_complete(sub_info);
 	}
 }