Merge tag 'trace-v4.10-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rosted...

[mirror_ubuntu-artful-kernel.git] / drivers / md / md.c

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 82821ee0d57fac691d26e0c3f41c2ba31bb611fc..01175dac0db6361f04cd1bcad910a59202cc276d 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5291,6 +5291,11 @@ int md_run(struct mddev *mddev)
        if (start_readonly && mddev->ro == 0)
                mddev->ro = 2; /* read-only, but switch on first write */
 
+       /*
+        * NOTE: some pers->run(), for example r5l_recovery_log(), wakes
+        * up mddev->thread. It is important to initialize critical
+        * resources for mddev->thread BEFORE calling pers->run().
+        */
        err = pers->run(mddev);
        if (err)
                pr_warn("md: pers->run() failed ...\n");