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xfs: Register hotcpu notifier after initialization 

Currently the code initializizes mp->m_icsb_mutex and other things
_after_ register_hotcpu_notifier().
As the notifier takes mp->m_icsb_mutex it can happen
that it takes the lock before it's initialization.

Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Richard Weinberger 2013-08-19 22:56:44 +02:00 committed by Ben Myers
parent 3e3c51cee9
commit 46677e679f
1 changed files with 7 additions and 6 deletions
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13
fs/xfs/xfs_mount.c
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@ -1548,12 +1548,6 @@ xfs_icsb_init_counters(
if (mp->m_sb_cnts == NULL) if (mp->m_sb_cnts == NULL)
return -ENOMEM; return -ENOMEM;
#ifdef CONFIG_HOTPLUG_CPU
mp->m_icsb_notifier.notifier_call = xfs_icsb_cpu_notify;
mp->m_icsb_notifier.priority = 0;
register_hotcpu_notifier(&mp->m_icsb_notifier);
#endif /* CONFIG_HOTPLUG_CPU */
for_each_online_cpu(i) { for_each_online_cpu(i) {
cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); memset(cntp, 0, sizeof(xfs_icsb_cnts_t));
@ -1566,6 +1560,13 @@ xfs_icsb_init_counters(
* initial balance kicks us off correctly * initial balance kicks us off correctly
*/ */
mp->m_icsb_counters = -1; mp->m_icsb_counters = -1;
#ifdef CONFIG_HOTPLUG_CPU
mp->m_icsb_notifier.notifier_call = xfs_icsb_cpu_notify;
mp->m_icsb_notifier.priority = 0;
register_hotcpu_notifier(&mp->m_icsb_notifier);
#endif /* CONFIG_HOTPLUG_CPU */
return 0; return 0;
} }