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Bury __put_super_and_need_restart()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2010-03-22 21:13:53 -04:00
parent 79893c17b4
commit 35cf7ba0b4
5 changed files with 6 additions and 31 deletions
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1
fs/drop_caches.c
View file

@ -8,6 +8,7 @@
#include <linux/writeback.h> #include <linux/writeback.h>
#include <linux/sysctl.h> #include <linux/sysctl.h>
#include <linux/gfp.h> #include <linux/gfp.h>
#include "internal.h"
/* A global variable is a bit ugly, but it keeps the code simple */ /* A global variable is a bit ugly, but it keeps the code simple */
int sysctl_drop_caches; int sysctl_drop_caches;

2
fs/internal.h
View file

@ -87,6 +87,8 @@ extern struct file *get_empty_filp(void);
* super.c * super.c
*/ */
extern int do_remount_sb(struct super_block *, int, void *, int); extern int do_remount_sb(struct super_block *, int, void *, int);
extern void __put_super(struct super_block *sb);
extern void put_super(struct super_block *sb);
/* /*
* open.c * open.c

1
fs/quota/quota.c
View file

@ -18,6 +18,7 @@
#include <linux/quotaops.h> #include <linux/quotaops.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/writeback.h> #include <linux/writeback.h>
#include "../internal.h"
static int check_quotactl_permission(struct super_block *sb, int type, int cmd, static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
qid_t id) qid_t id)

30
fs/super.c
View file

@ -127,40 +127,14 @@ static inline void destroy_super(struct super_block *s)
/* Superblock refcounting */ /* Superblock refcounting */
/* /*
* Drop a superblock's refcount. Returns non-zero if the superblock was * Drop a superblock's refcount. The caller must hold sb_lock.
* destroyed. The caller must hold sb_lock.
*/ */
int __put_super(struct super_block *sb) void __put_super(struct super_block *sb)
{ {
int ret = 0;
if (!--sb->s_count) { if (!--sb->s_count) {
list_del_init(&sb->s_list); list_del_init(&sb->s_list);
destroy_super(sb); destroy_super(sb);
ret = 1;
} }
return ret;
}
/*
* Drop a superblock's refcount.
* Returns non-zero if the superblock is about to be destroyed and
* at least is already removed from super_blocks list, so if we are
* making a loop through super blocks then we need to restart.
* The caller must hold sb_lock.
*/
int __put_super_and_need_restart(struct super_block *sb)
{
/* check for race with generic_shutdown_super() */
if (list_empty(&sb->s_instances)) {
/* super block is removed, need to restart... */
__put_super(sb);
return 1;
}
/* can't be the last, since s_list is still in use */
sb->s_count--;
BUG_ON(sb->s_count == 0);
return 0;
} }
/** /**

3
include/linux/fs.h
View file

@ -1778,9 +1778,6 @@ extern int get_sb_pseudo(struct file_system_type *, char *,
const struct super_operations *ops, unsigned long, const struct super_operations *ops, unsigned long,
struct vfsmount *mnt); struct vfsmount *mnt);
extern void simple_set_mnt(struct vfsmount *mnt, struct super_block *sb); extern void simple_set_mnt(struct vfsmount *mnt, struct super_block *sb);
int __put_super_and_need_restart(struct super_block *sb);
int __put_super(struct super_block *sb);
void put_super(struct super_block *sb);
/* Alas, no aliases. Too much hassle with bringing module.h everywhere */ /* Alas, no aliases. Too much hassle with bringing module.h everywhere */
#define fops_get(fops) \ #define fops_get(fops) \