Merge remote-tracking branch 'hid/for-next'

[karo-tx-linux.git] / include / linux / dcache.h

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index efdc94434c300df295ef1f30b2973ae8fc0c7c2c..716c3760ee3970908577ccdb4ea32fa0275d7e33 100644 (file)
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -55,11 +55,11 @@ struct qstr {
 #define hashlen_len(hashlen)  ((u32)((hashlen) >> 32))
 
 struct dentry_stat_t {
-       int nr_dentry;
-       int nr_unused;
-       int age_limit;          /* age in seconds */
-       int want_pages;         /* pages requested by system */
-       int dummy[2];
+       long nr_dentry;
+       long nr_unused;
+       long age_limit;          /* age in seconds */
+       long want_pages;         /* pages requested by system */
+       long dummy[2];
 };
 extern struct dentry_stat_t dentry_stat;
 
@@ -208,11 +208,12 @@ struct dentry_operations {
 #define DCACHE_MANAGED_DENTRY \
        (DCACHE_MOUNTED|DCACHE_NEED_AUTOMOUNT|DCACHE_MANAGE_TRANSIT)
 
+#define DCACHE_LRU_LIST                0x80000
 #define DCACHE_DENTRY_KILLED   0x100000
 
 extern seqlock_t rename_lock;
 
-static inline int dname_external(struct dentry *dentry)
+static inline int dname_external(const struct dentry *dentry)
 {
        return dentry->d_name.name != dentry->d_iname;
 }
@@ -223,6 +224,7 @@ static inline int dname_external(struct dentry *dentry)
 extern void d_instantiate(struct dentry *, struct inode *);
 extern struct dentry * d_instantiate_unique(struct dentry *, struct inode *);
 extern struct dentry * d_materialise_unique(struct dentry *, struct inode *);
+extern int d_instantiate_no_diralias(struct dentry *, struct inode *);
 extern void __d_drop(struct dentry *dentry);
 extern void d_drop(struct dentry *dentry);
 extern void d_delete(struct dentry *);
@@ -253,6 +255,7 @@ extern void d_prune_aliases(struct inode *);
 
 /* test whether we have any submounts in a subdir tree */
 extern int have_submounts(struct dentry *);
+extern int check_submounts_and_drop(struct dentry *);
 
 /*
  * This adds the entry to the hash queues.
@@ -304,28 +307,6 @@ extern struct dentry *__d_lookup(const struct dentry *, const struct qstr *);
 extern struct dentry *__d_lookup_rcu(const struct dentry *parent,
                                const struct qstr *name, unsigned *seq);
 
-/**
- * __d_rcu_to_refcount - take a refcount on dentry if sequence check is ok
- * @dentry: dentry to take a ref on
- * @seq: seqcount to verify against
- * Returns: 0 on failure, else 1.
- *
- * __d_rcu_to_refcount operates on a dentry,seq pair that was returned
- * by __d_lookup_rcu, to get a reference on an rcu-walk dentry.
- */
-static inline int __d_rcu_to_refcount(struct dentry *dentry, unsigned seq)
-{
-       int ret = 0;
-
-       assert_spin_locked(&dentry->d_lock);
-       if (!read_seqcount_retry(&dentry->d_seq, seq)) {
-               ret = 1;
-               dentry->d_lockref.count++;
-       }
-
-       return ret;
-}
-
 static inline unsigned d_count(const struct dentry *dentry)
 {
        return dentry->d_lockref.count;
@@ -379,17 +360,17 @@ extern struct dentry *dget_parent(struct dentry *dentry);
  *     Returns true if the dentry passed is not currently hashed.
  */
  
-static inline int d_unhashed(struct dentry *dentry)
+static inline int d_unhashed(const struct dentry *dentry)
 {
        return hlist_bl_unhashed(&dentry->d_hash);
 }
 
-static inline int d_unlinked(struct dentry *dentry)
+static inline int d_unlinked(const struct dentry *dentry)
 {
        return d_unhashed(dentry) && !IS_ROOT(dentry);
 }
 
-static inline int cant_mount(struct dentry *dentry)
+static inline int cant_mount(const struct dentry *dentry)
 {
        return (dentry->d_flags & DCACHE_CANT_MOUNT);
 }
@@ -403,16 +384,20 @@ static inline void dont_mount(struct dentry *dentry)
 
 extern void dput(struct dentry *);
 
-static inline bool d_managed(struct dentry *dentry)
+static inline bool d_managed(const struct dentry *dentry)
 {
        return dentry->d_flags & DCACHE_MANAGED_DENTRY;
 }
 
-static inline bool d_mountpoint(struct dentry *dentry)
+static inline bool d_mountpoint(const struct dentry *dentry)
 {
        return dentry->d_flags & DCACHE_MOUNTED;
 }
 
 extern int sysctl_vfs_cache_pressure;
 
+static inline unsigned long vfs_pressure_ratio(unsigned long val)
+{
+       return mult_frac(val, sysctl_vfs_cache_pressure, 100);
+}
 #endif /* __LINUX_DCACHE_H */