Freezer: Fix s2disk resume from initrd

Add appropriate freezer annotations to handle_initrd(), so that it's possible
to resume from disk from an initrd.

http://bugzilla.kernel.org/show_bug.cgi?id=9345

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@nigel.suspend2.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Chris Friedhoff <chris@friedhoff.org>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index fd4fc12..614241b 100644 (file)
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -55,12 +55,18 @@ static void __init handle_initrd(void)
        sys_mount(".", "/", NULL, MS_MOVE, NULL);
        sys_chroot(".");
 
+       /*
+        * In case that a resume from disk is carried out by linuxrc or one of
+        * its children, we need to tell the freezer not to wait for us.
+        */
+       current->flags |= PF_FREEZER_SKIP;
+
        pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
        if (pid > 0)
-               while (pid != sys_wait4(-1, NULL, 0, NULL)) {
-                       try_to_freeze();
+               while (pid != sys_wait4(-1, NULL, 0, NULL))
                        yield();
-               }
+
+       current->flags &= ~PF_FREEZER_SKIP;
 
        /* move initrd to rootfs' /old */
        sys_fchdir(old_fd);