diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c index c44bbedec817..4ddc453023a2 100644 --- a/drivers/usb/core/inode.c +++ b/drivers/usb/core/inode.c @@ -186,7 +186,7 @@ static void update_bus(struct dentry *bus) down(&bus->d_inode->i_sem); - list_for_each_entry(dev, &bus->d_subdirs, d_child) + list_for_each_entry(dev, &bus->d_subdirs, d_u.d_child) if (dev->d_inode) update_dev(dev); @@ -203,7 +203,7 @@ static void update_sb(struct super_block *sb) down(&root->d_inode->i_sem); - list_for_each_entry(bus, &root->d_subdirs, d_child) { + list_for_each_entry(bus, &root->d_subdirs, d_u.d_child) { if (bus->d_inode) { switch (S_IFMT & bus->d_inode->i_mode) { case S_IFDIR: @@ -319,7 +319,7 @@ static int usbfs_empty (struct dentry *dentry) spin_lock(&dcache_lock); list_for_each(list, &dentry->d_subdirs) { - struct dentry *de = list_entry(list, struct dentry, d_child); + struct dentry *de = list_entry(list, struct dentry, d_u.d_child); if (usbfs_positive(de)) { spin_unlock(&dcache_lock); return 0; diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index fca83e28edcf..385bed09b0d8 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -209,7 +209,7 @@ static inline int simple_empty_nolock(struct dentry *dentry) struct dentry *child; int ret = 0; - list_for_each_entry(child, &dentry->d_subdirs, d_child) + list_for_each_entry(child, &dentry->d_subdirs, d_u.d_child) if (simple_positive(child)) goto out; ret = 1; diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c index feb6ac427d05..dc39589df165 100644 --- a/fs/autofs4/expire.c +++ b/fs/autofs4/expire.c @@ -105,7 +105,7 @@ static int autofs4_check_tree(struct vfsmount *mnt, next = this_parent->d_subdirs.next; resume: while (next != &this_parent->d_subdirs) { - struct dentry *dentry = list_entry(next, struct dentry, d_child); + struct dentry *dentry = list_entry(next, struct dentry, d_u.d_child); /* Negative dentry - give up */ if (!simple_positive(dentry)) { @@ -138,7 +138,7 @@ static int autofs4_check_tree(struct vfsmount *mnt, } if (this_parent != top) { - next = this_parent->d_child.next; + next = this_parent->d_u.d_child.next; this_parent = this_parent->d_parent; goto resume; } @@ -163,7 +163,7 @@ static struct dentry *autofs4_check_leaves(struct vfsmount *mnt, next = this_parent->d_subdirs.next; resume: while (next != &this_parent->d_subdirs) { - struct dentry *dentry = list_entry(next, struct dentry, d_child); + struct dentry *dentry = list_entry(next, struct dentry, d_u.d_child); /* Negative dentry - give up */ if (!simple_positive(dentry)) { @@ -199,7 +199,7 @@ static struct dentry *autofs4_check_leaves(struct vfsmount *mnt, } if (this_parent != parent) { - next = this_parent->d_child.next; + next = this_parent->d_u.d_child.next; this_parent = this_parent->d_parent; goto resume; } @@ -238,7 +238,7 @@ static struct dentry *autofs4_expire(struct super_block *sb, /* On exit from the loop expire is set to a dgot dentry * to expire or it's NULL */ while ( next != &root->d_subdirs ) { - struct dentry *dentry = list_entry(next, struct dentry, d_child); + struct dentry *dentry = list_entry(next, struct dentry, d_u.d_child); /* Negative dentry - give up */ if ( !simple_positive(dentry) ) { @@ -302,7 +302,7 @@ static struct dentry *autofs4_expire(struct super_block *sb, expired, (int)expired->d_name.len, expired->d_name.name); spin_lock(&dcache_lock); list_del(&expired->d_parent->d_subdirs); - list_add(&expired->d_parent->d_subdirs, &expired->d_child); + list_add(&expired->d_parent->d_subdirs, &expired->d_u.d_child); spin_unlock(&dcache_lock); return expired; } diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index 818b37be5153..2d3082854a29 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -91,7 +91,7 @@ static void autofs4_force_release(struct autofs_sb_info *sbi) next = this_parent->d_subdirs.next; resume: while (next != &this_parent->d_subdirs) { - struct dentry *dentry = list_entry(next, struct dentry, d_child); + struct dentry *dentry = list_entry(next, struct dentry, d_u.d_child); /* Negative dentry - don`t care */ if (!simple_positive(dentry)) { @@ -117,7 +117,7 @@ static void autofs4_force_release(struct autofs_sb_info *sbi) if (this_parent != sbi->root) { struct dentry *dentry = this_parent; - next = this_parent->d_child.next; + next = this_parent->d_u.d_child.next; this_parent = this_parent->d_parent; spin_unlock(&dcache_lock); DPRINTK("parent dentry %p %.*s", diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c index 2a771ec66956..2241405ffc41 100644 --- a/fs/autofs4/root.c +++ b/fs/autofs4/root.c @@ -143,7 +143,8 @@ static int autofs4_dcache_readdir(struct file * filp, void * dirent, filldir_t f } while(1) { - struct dentry *de = list_entry(list, struct dentry, d_child); + struct dentry *de = list_entry(list, + struct dentry, d_u.d_child); if (!d_unhashed(de) && de->d_inode) { spin_unlock(&dcache_lock); diff --git a/fs/coda/cache.c b/fs/coda/cache.c index 80072fd9b7fa..c607d923350a 100644 --- a/fs/coda/cache.c +++ b/fs/coda/cache.c @@ -93,7 +93,7 @@ static void coda_flag_children(struct dentry *parent, int flag) spin_lock(&dcache_lock); list_for_each(child, &parent->d_subdirs) { - de = list_entry(child, struct dentry, d_child); + de = list_entry(child, struct dentry, d_u.d_child); /* don't know what to do with negative dentries */ if ( ! de->d_inode ) continue; diff --git a/fs/dcache.c b/fs/dcache.c index 17e439138681..1536f15c4d4c 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -71,7 +71,7 @@ struct dentry_stat_t dentry_stat = { static void d_callback(struct rcu_head *head) { - struct dentry * dentry = container_of(head, struct dentry, d_rcu); + struct dentry * dentry = container_of(head, struct dentry, d_u.d_rcu); if (dname_external(dentry)) kfree(dentry->d_name.name); @@ -86,7 +86,7 @@ static void d_free(struct dentry *dentry) { if (dentry->d_op && dentry->d_op->d_release) dentry->d_op->d_release(dentry); - call_rcu(&dentry->d_rcu, d_callback); + call_rcu(&dentry->d_u.d_rcu, d_callback); } /* @@ -193,7 +193,7 @@ kill_it: { list_del(&dentry->d_lru); dentry_stat.nr_unused--; } - list_del(&dentry->d_child); + list_del(&dentry->d_u.d_child); dentry_stat.nr_dentry--; /* For d_free, below */ /*drops the locks, at that point nobody can reach this dentry */ dentry_iput(dentry); @@ -367,7 +367,7 @@ static inline void prune_one_dentry(struct dentry * dentry) struct dentry * parent; __d_drop(dentry); - list_del(&dentry->d_child); + list_del(&dentry->d_u.d_child); dentry_stat.nr_dentry--; /* For d_free, below */ dentry_iput(dentry); parent = dentry->d_parent; @@ -518,7 +518,7 @@ int have_submounts(struct dentry *parent) resume: while (next != &this_parent->d_subdirs) { struct list_head *tmp = next; - struct dentry *dentry = list_entry(tmp, struct dentry, d_child); + struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child); next = tmp->next; /* Have we found a mount point ? */ if (d_mountpoint(dentry)) @@ -532,7 +532,7 @@ int have_submounts(struct dentry *parent) * All done at this level ... ascend and resume the search. */ if (this_parent != parent) { - next = this_parent->d_child.next; + next = this_parent->d_u.d_child.next; this_parent = this_parent->d_parent; goto resume; } @@ -569,7 +569,7 @@ static int select_parent(struct dentry * parent) resume: while (next != &this_parent->d_subdirs) { struct list_head *tmp = next; - struct dentry *dentry = list_entry(tmp, struct dentry, d_child); + struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child); next = tmp->next; if (!list_empty(&dentry->d_lru)) { @@ -610,7 +610,7 @@ dentry->d_parent->d_name.name, dentry->d_name.name, found); * All done at this level ... ascend and resume the search. */ if (this_parent != parent) { - next = this_parent->d_child.next; + next = this_parent->d_u.d_child.next; this_parent = this_parent->d_parent; #ifdef DCACHE_DEBUG printk(KERN_DEBUG "select_parent: ascending to %s/%s, found=%d\n", @@ -753,12 +753,12 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name) dentry->d_parent = dget(parent); dentry->d_sb = parent->d_sb; } else { - INIT_LIST_HEAD(&dentry->d_child); + INIT_LIST_HEAD(&dentry->d_u.d_child); } spin_lock(&dcache_lock); if (parent) - list_add(&dentry->d_child, &parent->d_subdirs); + list_add(&dentry->d_u.d_child, &parent->d_subdirs); dentry_stat.nr_dentry++; spin_unlock(&dcache_lock); @@ -1310,8 +1310,8 @@ void d_move(struct dentry * dentry, struct dentry * target) /* Unhash the target: dput() will then get rid of it */ __d_drop(target); - list_del(&dentry->d_child); - list_del(&target->d_child); + list_del(&dentry->d_u.d_child); + list_del(&target->d_u.d_child); /* Switch the names.. */ switch_names(dentry, target); @@ -1322,15 +1322,15 @@ void d_move(struct dentry * dentry, struct dentry * target) if (IS_ROOT(dentry)) { dentry->d_parent = target->d_parent; target->d_parent = target; - INIT_LIST_HEAD(&target->d_child); + INIT_LIST_HEAD(&target->d_u.d_child); } else { do_switch(dentry->d_parent, target->d_parent); /* And add them back to the (new) parent lists */ - list_add(&target->d_child, &target->d_parent->d_subdirs); + list_add(&target->d_u.d_child, &target->d_parent->d_subdirs); } - list_add(&dentry->d_child, &dentry->d_parent->d_subdirs); + list_add(&dentry->d_u.d_child, &dentry->d_parent->d_subdirs); spin_unlock(&target->d_lock); spin_unlock(&dentry->d_lock); write_sequnlock(&rename_lock); @@ -1568,7 +1568,7 @@ void d_genocide(struct dentry *root) resume: while (next != &this_parent->d_subdirs) { struct list_head *tmp = next; - struct dentry *dentry = list_entry(tmp, struct dentry, d_child); + struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child); next = tmp->next; if (d_unhashed(dentry)||!dentry->d_inode) continue; @@ -1579,7 +1579,7 @@ void d_genocide(struct dentry *root) atomic_dec(&dentry->d_count); } if (this_parent != root) { - next = this_parent->d_child.next; + next = this_parent->d_u.d_child.next; atomic_dec(&this_parent->d_count); this_parent = this_parent->d_parent; goto resume; diff --git a/fs/libfs.c b/fs/libfs.c index 58101dff2c66..9c50523382e7 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -93,16 +93,16 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin) loff_t n = file->f_pos - 2; spin_lock(&dcache_lock); - list_del(&cursor->d_child); + list_del(&cursor->d_u.d_child); p = file->f_dentry->d_subdirs.next; while (n && p != &file->f_dentry->d_subdirs) { struct dentry *next; - next = list_entry(p, struct dentry, d_child); + next = list_entry(p, struct dentry, d_u.d_child); if (!d_unhashed(next) && next->d_inode) n--; p = p->next; } - list_add_tail(&cursor->d_child, p); + list_add_tail(&cursor->d_u.d_child, p); spin_unlock(&dcache_lock); } } @@ -126,7 +126,7 @@ int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir) { struct dentry *dentry = filp->f_dentry; struct dentry *cursor = filp->private_data; - struct list_head *p, *q = &cursor->d_child; + struct list_head *p, *q = &cursor->d_u.d_child; ino_t ino; int i = filp->f_pos; @@ -153,7 +153,7 @@ int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir) } for (p=q->next; p != &dentry->d_subdirs; p=p->next) { struct dentry *next; - next = list_entry(p, struct dentry, d_child); + next = list_entry(p, struct dentry, d_u.d_child); if (d_unhashed(next) || !next->d_inode) continue; @@ -261,7 +261,7 @@ int simple_empty(struct dentry *dentry) int ret = 0; spin_lock(&dcache_lock); - list_for_each_entry(child, &dentry->d_subdirs, d_child) + list_for_each_entry(child, &dentry->d_subdirs, d_u.d_child) if (simple_positive(child)) goto out; ret = 1; diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c index a9f7a8ab1d59..cfd76f431dc0 100644 --- a/fs/ncpfs/dir.c +++ b/fs/ncpfs/dir.c @@ -365,7 +365,7 @@ ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) spin_lock(&dcache_lock); next = parent->d_subdirs.next; while (next != &parent->d_subdirs) { - dent = list_entry(next, struct dentry, d_child); + dent = list_entry(next, struct dentry, d_u.d_child); if ((unsigned long)dent->d_fsdata == fpos) { if (dent->d_inode) dget_locked(dent); diff --git a/fs/ncpfs/ncplib_kernel.h b/fs/ncpfs/ncplib_kernel.h index 9e4dc30c2435..799e5c2bec55 100644 --- a/fs/ncpfs/ncplib_kernel.h +++ b/fs/ncpfs/ncplib_kernel.h @@ -196,7 +196,7 @@ ncp_renew_dentries(struct dentry *parent) spin_lock(&dcache_lock); next = parent->d_subdirs.next; while (next != &parent->d_subdirs) { - dentry = list_entry(next, struct dentry, d_child); + dentry = list_entry(next, struct dentry, d_u.d_child); if (dentry->d_fsdata == NULL) ncp_age_dentry(server, dentry); @@ -218,7 +218,7 @@ ncp_invalidate_dircache_entries(struct dentry *parent) spin_lock(&dcache_lock); next = parent->d_subdirs.next; while (next != &parent->d_subdirs) { - dentry = list_entry(next, struct dentry, d_child); + dentry = list_entry(next, struct dentry, d_u.d_child); dentry->d_fsdata = NULL; ncp_age_dentry(server, dentry); next = next->next; diff --git a/fs/smbfs/cache.c b/fs/smbfs/cache.c index f3e6b81288ab..74b86d9725a6 100644 --- a/fs/smbfs/cache.c +++ b/fs/smbfs/cache.c @@ -66,7 +66,7 @@ smb_invalidate_dircache_entries(struct dentry *parent) spin_lock(&dcache_lock); next = parent->d_subdirs.next; while (next != &parent->d_subdirs) { - dentry = list_entry(next, struct dentry, d_child); + dentry = list_entry(next, struct dentry, d_u.d_child); dentry->d_fsdata = NULL; smb_age_dentry(server, dentry); next = next->next; @@ -100,7 +100,7 @@ smb_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) spin_lock(&dcache_lock); next = parent->d_subdirs.next; while (next != &parent->d_subdirs) { - dent = list_entry(next, struct dentry, d_child); + dent = list_entry(next, struct dentry, d_u.d_child); if ((unsigned long)dent->d_fsdata == fpos) { if (dent->d_inode) dget_locked(dent); diff --git a/include/linux/dcache.h b/include/linux/dcache.h index 46a2ba617595..a3ed5e059d47 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -95,14 +95,19 @@ struct dentry { struct qstr d_name; struct list_head d_lru; /* LRU list */ - struct list_head d_child; /* child of parent list */ + /* + * d_child and d_rcu can share memory + */ + union { + struct list_head d_child; /* child of parent list */ + struct rcu_head d_rcu; + } d_u; struct list_head d_subdirs; /* our children */ struct list_head d_alias; /* inode alias list */ unsigned long d_time; /* used by d_revalidate */ struct dentry_operations *d_op; struct super_block *d_sb; /* The root of the dentry tree */ void *d_fsdata; /* fs-specific data */ - struct rcu_head d_rcu; struct dcookie_struct *d_cookie; /* cookie, if any */ int d_mounted; unsigned char d_iname[DNAME_INLINE_LEN_MIN]; /* small names */ diff --git a/kernel/cpuset.c b/kernel/cpuset.c index e04c2da9dadb..eab64e23bcae 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -331,7 +331,7 @@ static void cpuset_d_remove_dir(struct dentry *dentry) spin_lock(&dcache_lock); node = dentry->d_subdirs.next; while (node != &dentry->d_subdirs) { - struct dentry *d = list_entry(node, struct dentry, d_child); + struct dentry *d = list_entry(node, struct dentry, d_u.d_child); list_del_init(node); if (d->d_inode) { d = dget_locked(d); @@ -343,7 +343,7 @@ static void cpuset_d_remove_dir(struct dentry *dentry) } node = dentry->d_subdirs.next; } - list_del_init(&dentry->d_child); + list_del_init(&dentry->d_u.d_child); spin_unlock(&dcache_lock); remove_dir(dentry); } diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index 24cc23af9b95..e14c1cae7460 100644 --- a/net/sunrpc/rpc_pipe.c +++ b/net/sunrpc/rpc_pipe.c @@ -495,7 +495,7 @@ rpc_depopulate(struct dentry *parent) repeat: spin_lock(&dcache_lock); list_for_each_safe(pos, next, &parent->d_subdirs) { - dentry = list_entry(pos, struct dentry, d_child); + dentry = list_entry(pos, struct dentry, d_u.d_child); spin_lock(&dentry->d_lock); if (!d_unhashed(dentry)) { dget_locked(dentry); diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c index e59da6398d44..b5fa02d17b1e 100644 --- a/security/selinux/selinuxfs.c +++ b/security/selinux/selinuxfs.c @@ -889,7 +889,7 @@ static void sel_remove_bools(struct dentry *de) spin_lock(&dcache_lock); node = de->d_subdirs.next; while (node != &de->d_subdirs) { - struct dentry *d = list_entry(node, struct dentry, d_child); + struct dentry *d = list_entry(node, struct dentry, d_u.d_child); list_del_init(node); if (d->d_inode) {