diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2017-06-27 17:59:28 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-06-29 09:29:49 -0700 |
| commit | 9a60c3ef577beb0376704808949f2c1f8fb0672c (patch) | |
| tree | 380ccc02e12d369daca7ec13d93593e06dd6cf52 /drivers/dax | |
| parent | 5d61e43b3975c0582003329d9de9d5e85abf5d33 (diff) | |
| download | linux-9a60c3ef577beb0376704808949f2c1f8fb0672c.tar.gz linux-9a60c3ef577beb0376704808949f2c1f8fb0672c.tar.bz2 linux-9a60c3ef577beb0376704808949f2c1f8fb0672c.zip | |
dax: convert to bitmask for flags
In preparation for adding more flags, convert the existing flag to a
bit-flag.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dax')
| -rw-r--r-- | drivers/dax/super.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 9e0160b950d7..8bf71195921b 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -116,13 +116,18 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize) EXPORT_SYMBOL_GPL(__bdev_dax_supported); #endif +enum dax_device_flags { + /* !alive + rcu grace period == no new operations / mappings */ + DAXDEV_ALIVE, +}; + /** * struct dax_device - anchor object for dax services * @inode: core vfs * @cdev: optional character interface for "device dax" * @host: optional name for lookups where the device path is not available * @private: dax driver private data - * @alive: !alive + rcu grace period == no new operations / mappings + * @flags: state and boolean properties */ struct dax_device { struct hlist_node list; @@ -130,7 +135,7 @@ struct dax_device { struct cdev cdev; const char *host; void *private; - bool alive; + unsigned long flags; const struct dax_operations *ops; }; @@ -197,7 +202,7 @@ EXPORT_SYMBOL_GPL(dax_flush); bool dax_alive(struct dax_device *dax_dev) { lockdep_assert_held(&dax_srcu); - return dax_dev->alive; + return test_bit(DAXDEV_ALIVE, &dax_dev->flags); } EXPORT_SYMBOL_GPL(dax_alive); @@ -217,7 +222,7 @@ void kill_dax(struct dax_device *dax_dev) if (!dax_dev) return; - dax_dev->alive = false; + clear_bit(DAXDEV_ALIVE, &dax_dev->flags); synchronize_srcu(&dax_srcu); @@ -257,7 +262,7 @@ static void dax_destroy_inode(struct inode *inode) { struct dax_device *dax_dev = to_dax_dev(inode); - WARN_ONCE(dax_dev->alive, + WARN_ONCE(test_bit(DAXDEV_ALIVE, &dax_dev->flags), "kill_dax() must be called before final iput()\n"); call_rcu(&inode->i_rcu, dax_i_callback); } @@ -309,7 +314,7 @@ static struct dax_device *dax_dev_get(dev_t devt) dax_dev = to_dax_dev(inode); if (inode->i_state & I_NEW) { - dax_dev->alive = true; + set_bit(DAXDEV_ALIVE, &dax_dev->flags); inode->i_cdev = &dax_dev->cdev; inode->i_mode = S_IFCHR; inode->i_flags = S_DAX; |