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authorNeilBrown <neilb@suse.com>2017-10-19 04:49:15 +0300
committerShaohua Li <shli@fb.com>2017-11-02 07:32:20 +0300
commitb03e0ccb5ab9df3efbe51c87843a1ffbecbafa1f (patch)
tree4991194aa067e459500bf1c6515b6d716145165c /drivers/md/raid10.c
parent35bfc52187f6df8779d0f1cebdb52b7f797baf4e (diff)
downloadlinux-b03e0ccb5ab9df3efbe51c87843a1ffbecbafa1f.tar.xz
md: remove special meaning of ->quiesce(.., 2)
The '2' argument means "wake up anything that is waiting". This is an inelegant part of the design and was added to help support management of suspend_lo/suspend_hi setting. Now that suspend_lo/hi is managed in mddev_suspend/resume, that need is gone. These is still a couple of places where we call 'quiesce' with an argument of '2', but they can safely be changed to call ->quiesce(.., 1); ->quiesce(.., 0) which achieve the same result at the small cost of pausing IO briefly. This removes a small "optimization" from suspend_{hi,lo}_store, but it isn't clear that optimization served a useful purpose. The code now is a lot clearer. Suggested-by: Shaohua Li <shli@kernel.org> Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid10.c')
-rw-r--r--drivers/md/raid10.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index b0de5b5ee689..615f677ceb1a 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -3828,18 +3828,14 @@ static void raid10_free(struct mddev *mddev, void *priv)
kfree(conf);
}
-static void raid10_quiesce(struct mddev *mddev, int state)
+static void raid10_quiesce(struct mddev *mddev, int quiesce)
{
struct r10conf *conf = mddev->private;
- switch(state) {
- case 1:
+ if (quiesce)
raise_barrier(conf, 0);
- break;
- case 0:
+ else
lower_barrier(conf);
- break;
- }
}
static int raid10_resize(struct mddev *mddev, sector_t sectors)