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Groups > linux.kernel > #1738704
| From | "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH review for 4.9 18/50] md/linear: shutup lockdep warnning |
| Date | 2017-09-25 03:40 +0200 |
| Message-ID | <utqxl-7O2-49@gated-at.bofh.it> (permalink) |
| References | <utqdY-7Fr-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Shaohua Li <shli@fb.com> [ Upstream commit d939cdfde34f50b95254b375f498447c82190b3e ] Commit 03a9e24(md linear: fix a race between linear_add() and linear_congested()) introduces the warnning. Acked-by: Coly Li <colyli@suse.de> Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> --- drivers/md/linear.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/md/linear.c b/drivers/md/linear.c index b0c0aef92a37..12abf69d568a 100644 --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -223,7 +223,8 @@ static int linear_add(struct mddev *mddev, struct md_rdev *rdev) * oldconf until no one uses it anymore. */ mddev_suspend(mddev); - oldconf = rcu_dereference(mddev->private); + oldconf = rcu_dereference_protected(mddev->private, + lockdep_is_held(&mddev->reconfig_mutex)); mddev->raid_disks++; WARN_ONCE(mddev->raid_disks != newconf->raid_disks, "copied raid_disks doesn't match mddev->raid_disks"); -- 2.11.0
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[PATCH review for 4.9 01/50] xen-netback: Use GFP_ATOMIC to allocate hash "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 17/50] f2fs: do not wait for writeback in write_begin "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 15/50] sched/fair: Update rq clock before changing a task's CPU affinity "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 26/50] ASoC: mediatek: add I2C dependency for CS42XX8 "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 42/50] hrtimer: Catch invalid clockids again "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 06/50] mac80211_hwsim: check HWSIM_ATTR_RADIO_NAME length "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 07/50] ALSA: hda: Add Geminilake HDMI codec ID "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 05/50] initramfs: finish fput() before accessing any binary from initramfs "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 14/50] f2fs: do SSR for data when there is enough free space "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 02/50] locking/lockdep: Add nest_lock integrity test "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 18/50] md/linear: shutup lockdep warnning "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 12/50] netfilter: nf_ct_expect: Change __nf_ct_expect_check() return value. "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200 [PATCH review for 4.9 24/50] slub: do not merge cache if slub_debug contains a never-merge flag "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-25 03:40 +0200
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