path: root/include/linux/raid/md_k.h
diff options
authorNeilBrown <neilb@suse.de>2009-03-31 14:27:02 +1100
committerNeilBrown <neilb@suse.de>2009-03-31 14:27:02 +1100
commiteea1bf384e05b5ab747f8530c4fba9e9e6907fff (patch)
treeed4c05f8bd7e5805092e9c6a2c257ca71dc0fe2d /include/linux/raid/md_k.h
parentMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq (diff)
md: Fix is_mddev_idle test (again).
There are two problems with is_mddev_idle. 1/ sync_io is 'atomic_t' and hence 'int'. curr_events and all the rest are 'long'. So if sync_io were to wrap on a 64bit host, the value of curr_events would go very negative suddenly, and take a very long time to return to positive. So do all calculations as 'int'. That gives us plenty of precision for what we need. 2/ To initialise rdev->last_events we simply call is_mddev_idle, on the assumption that it will make sure that last_events is in a suitable range. It used to do this, but now it does not. So now we need to be more explicit about initialisation. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'include/linux/raid/md_k.h')
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 9743e4dbc918..4aedb9fe2bd8 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -51,7 +51,7 @@ struct mdk_rdev_s
sector_t size; /* Device size (in blocks) */
mddev_t *mddev; /* RAID array if running */
- long last_events; /* IO event timestamp */
+ int last_events; /* IO event timestamp */
struct block_device *bdev; /* block device handle */