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get rid of autofs_info->active_count 

autofs_add_active() is always called only once (and on a dentry
with freshly allocated ino, at that).  autofs_del_active() is
never called more than once.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2019-07-27 10:00:33 -04:00
parent ff09297ec9
commit c4931db9b0
2 changed files with 6 additions and 28 deletions
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1
fs/autofs/autofs_i.h
View File

@ -58,7 +58,6 @@ struct autofs_info {
struct completion expire_complete; struct completion expire_complete;
struct list_head active; struct list_head active;
int active_count;
struct list_head expiring; struct list_head expiring;

33
fs/autofs/root.c
View File

@ -60,38 +60,15 @@ const struct dentry_operations autofs_dentry_operations = {
.d_release = autofs_dentry_release, .d_release = autofs_dentry_release,
}; };
static void autofs_add_active(struct dentry *dentry)
{
struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
struct autofs_info *ino;
ino = autofs_dentry_ino(dentry);
if (ino) {
spin_lock(&sbi->lookup_lock);
if (!ino->active_count) {
if (list_empty(&ino->active))
list_add(&ino->active, &sbi->active_list);
}
ino->active_count++;
spin_unlock(&sbi->lookup_lock);
}
}
static void autofs_del_active(struct dentry *dentry) static void autofs_del_active(struct dentry *dentry)
{ {
struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb); struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
struct autofs_info *ino; struct autofs_info *ino;
ino = autofs_dentry_ino(dentry); ino = autofs_dentry_ino(dentry);
if (ino) { spin_lock(&sbi->lookup_lock);
spin_lock(&sbi->lookup_lock); list_del_init(&ino->active);
ino->active_count--; spin_unlock(&sbi->lookup_lock);
if (!ino->active_count) {
if (!list_empty(&ino->active))
list_del_init(&ino->active);
}
spin_unlock(&sbi->lookup_lock);
}
} }
static int autofs_dir_open(struct inode *inode, struct file *file) static int autofs_dir_open(struct inode *inode, struct file *file)
@ -539,7 +516,9 @@ static struct dentry *autofs_lookup(struct inode *dir,
dentry->d_fsdata = ino; dentry->d_fsdata = ino;
ino->dentry = dentry; ino->dentry = dentry;
autofs_add_active(dentry); spin_lock(&sbi->lookup_lock);
list_add(&ino->active, &sbi->active_list);
spin_unlock(&sbi->lookup_lock);
} }
return NULL; return NULL;
} }