vfs: all counters taken to struct mount
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/mount.h b/fs/mount.h
index 853738f..452ae41 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -1,10 +1,22 @@
#include <linux/mount.h>
+struct mnt_pcp {
+ int mnt_count;
+ int mnt_writers;
+};
+
struct mount {
struct list_head mnt_hash;
struct mount *mnt_parent;
struct dentry *mnt_mountpoint;
struct vfsmount mnt;
+#ifdef CONFIG_SMP
+ struct mnt_pcp __percpu *mnt_pcp;
+ atomic_t mnt_longterm; /* how many of the refs are longterm */
+#else
+ int mnt_count;
+ int mnt_writers;
+#endif
};
static inline struct mount *real_mount(struct vfsmount *mnt)
diff --git a/fs/namespace.c b/fs/namespace.c
index a13165c..3fdd30a 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -144,10 +144,10 @@
static inline void mnt_add_count(struct mount *mnt, int n)
{
#ifdef CONFIG_SMP
- this_cpu_add(mnt->mnt.mnt_pcp->mnt_count, n);
+ this_cpu_add(mnt->mnt_pcp->mnt_count, n);
#else
preempt_disable();
- mnt->mnt.mnt_count += n;
+ mnt->mnt_count += n;
preempt_enable();
#endif
}
@@ -162,12 +162,12 @@
int cpu;
for_each_possible_cpu(cpu) {
- count += per_cpu_ptr(mnt->mnt.mnt_pcp, cpu)->mnt_count;
+ count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count;
}
return count;
#else
- return mnt->mnt.mnt_count;
+ return mnt->mnt_count;
#endif
}
@@ -189,14 +189,14 @@
}
#ifdef CONFIG_SMP
- mnt->mnt_pcp = alloc_percpu(struct mnt_pcp);
- if (!mnt->mnt_pcp)
+ p->mnt_pcp = alloc_percpu(struct mnt_pcp);
+ if (!p->mnt_pcp)
goto out_free_devname;
- this_cpu_add(mnt->mnt_pcp->mnt_count, 1);
+ this_cpu_add(p->mnt_pcp->mnt_count, 1);
#else
- mnt->mnt_count = 1;
- mnt->mnt_writers = 0;
+ p->mnt_count = 1;
+ p->mnt_writers = 0;
#endif
INIT_LIST_HEAD(&p->mnt_hash);
@@ -256,18 +256,18 @@
static inline void mnt_inc_writers(struct mount *mnt)
{
#ifdef CONFIG_SMP
- this_cpu_inc(mnt->mnt.mnt_pcp->mnt_writers);
+ this_cpu_inc(mnt->mnt_pcp->mnt_writers);
#else
- mnt->mnt.mnt_writers++;
+ mnt->mnt_writers++;
#endif
}
static inline void mnt_dec_writers(struct mount *mnt)
{
#ifdef CONFIG_SMP
- this_cpu_dec(mnt->mnt.mnt_pcp->mnt_writers);
+ this_cpu_dec(mnt->mnt_pcp->mnt_writers);
#else
- mnt->mnt.mnt_writers--;
+ mnt->mnt_writers--;
#endif
}
@@ -278,7 +278,7 @@
int cpu;
for_each_possible_cpu(cpu) {
- count += per_cpu_ptr(mnt->mnt.mnt_pcp, cpu)->mnt_writers;
+ count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_writers;
}
return count;
@@ -454,7 +454,7 @@
kfree(mnt->mnt.mnt_devname);
mnt_free_id(mnt);
#ifdef CONFIG_SMP
- free_percpu(mnt->mnt.mnt_pcp);
+ free_percpu(mnt->mnt_pcp);
#endif
kmem_cache_free(mnt_cache, mnt);
}
@@ -594,7 +594,7 @@
static inline void __mnt_make_longterm(struct mount *mnt)
{
#ifdef CONFIG_SMP
- atomic_inc(&mnt->mnt.mnt_longterm);
+ atomic_inc(&mnt->mnt_longterm);
#endif
}
@@ -602,7 +602,7 @@
static inline void __mnt_make_shortterm(struct mount *mnt)
{
#ifdef CONFIG_SMP
- atomic_dec(&mnt->mnt.mnt_longterm);
+ atomic_dec(&mnt->mnt_longterm);
#endif
}
@@ -769,7 +769,7 @@
put_again:
#ifdef CONFIG_SMP
br_read_lock(vfsmount_lock);
- if (likely(atomic_read(&mnt->mnt.mnt_longterm))) {
+ if (likely(atomic_read(&mnt->mnt_longterm))) {
mnt_add_count(mnt, -1);
br_read_unlock(vfsmount_lock);
return;
@@ -2375,10 +2375,10 @@
{
#ifdef CONFIG_SMP
struct mount *mnt = real_mount(m);
- if (atomic_add_unless(&mnt->mnt.mnt_longterm, -1, 1))
+ if (atomic_add_unless(&mnt->mnt_longterm, -1, 1))
return;
br_write_lock(vfsmount_lock);
- atomic_dec(&mnt->mnt.mnt_longterm);
+ atomic_dec(&mnt->mnt_longterm);
br_write_unlock(vfsmount_lock);
#endif
}
diff --git a/include/linux/mount.h b/include/linux/mount.h
index e3f0059..cc01ed1 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -47,21 +47,9 @@
#define MNT_INTERNAL 0x4000
-struct mnt_pcp {
- int mnt_count;
- int mnt_writers;
-};
-
struct vfsmount {
struct dentry *mnt_root; /* root of the mounted tree */
struct super_block *mnt_sb; /* pointer to superblock */
-#ifdef CONFIG_SMP
- struct mnt_pcp __percpu *mnt_pcp;
- atomic_t mnt_longterm; /* how many of the refs are longterm */
-#else
- int mnt_count;
- int mnt_writers;
-#endif
struct list_head mnt_mounts; /* list of children, anchored here */
struct list_head mnt_child; /* and going through their mnt_child */
int mnt_flags;