diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2015-07-22 20:21:13 +0200 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2015-08-15 13:52:11 +0200 |
| commit | 853b39a7c82826b8413048feec7bf08e98ce7a84 (patch) | |
| tree | 459b6afcc9d478a4beb6347627cc13da2e24b132 /include/linux/fs.h | |
| parent | bf3eac84c42da7017610abc8cfba64921ea92c76 (diff) | |
shift percpu_counter_destroy() into destroy_super_work()
Of course, this patch is ugly as hell. It will be (partially)
reverted later. We add it to ensure that other WIP changes in
percpu_rw_semaphore won't break fs/super.c.
We do not even need this change right now, percpu_free_rwsem()
is fine in atomic context. But we are going to change this, it
will be might_sleep() after we merge the rcu_sync() patches.
And even after that we do not really need destroy_super_work(),
we will kill it in any case. Instead, destroy_super_rcu() should
just check that rss->cb_state == CB_IDLE and do call_rcu() again
in the (very unlikely) case this is not true.
So this is just the temporary kludge which helps us to avoid the
conflicts with the changes which will be (hopefully) routed via
rcu tree.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Jan Kara <jack@suse.com>
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index acb7cad84edd..4bed78966c6b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -30,6 +30,7 @@ #include <linux/lockdep.h> #include <linux/percpu-rwsem.h> #include <linux/blk_types.h> +#include <linux/workqueue.h> #include <asm/byteorder.h> #include <uapi/linux/fs.h> @@ -1375,7 +1376,7 @@ struct super_block { struct list_lru s_dentry_lru ____cacheline_aligned_in_smp; struct list_lru s_inode_lru ____cacheline_aligned_in_smp; struct rcu_head rcu; - + struct work_struct destroy_work; /* * Indicates how deep in a filesystem stack this SB is */ |