From dfeb0750b630b72b5d4fb2461bc7179eceb54666 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 13 Feb 2015 14:36:31 -0800 Subject: kernfs: remove KERNFS_STATIC_NAME When a new kernfs node is created, KERNFS_STATIC_NAME is used to avoid making a separate copy of its name. It's currently only used for sysfs attributes whose filenames are required to stay accessible and unchanged. There are rare exceptions where these names are allocated and formatted dynamically but for the vast majority of cases they're consts in the rodata section. Now that kernfs is converted to use kstrdup_const() and kfree_const(), there's little point in keeping KERNFS_STATIC_NAME around. Remove it. Signed-off-by: Tejun Heo Cc: Andrzej Hajda Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/kernfs/dir.c | 20 ++++++++------------ fs/kernfs/file.c | 4 ---- 2 files changed, 8 insertions(+), 16 deletions(-) (limited to 'fs/kernfs') diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index 35e40879860a..6acc9648f986 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -411,8 +411,9 @@ void kernfs_put(struct kernfs_node *kn) if (kernfs_type(kn) == KERNFS_LINK) kernfs_put(kn->symlink.target_kn); - if (!(kn->flags & KERNFS_STATIC_NAME)) - kfree_const(kn->name); + + kfree_const(kn->name); + if (kn->iattr) { if (kn->iattr->ia_secdata) security_release_secctx(kn->iattr->ia_secdata, @@ -506,15 +507,12 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root, const char *name, umode_t mode, unsigned flags) { - const char *dup_name = NULL; struct kernfs_node *kn; int ret; - if (!(flags & KERNFS_STATIC_NAME)) { - name = dup_name = kstrdup_const(name, GFP_KERNEL); - if (!name) - return NULL; - } + name = kstrdup_const(name, GFP_KERNEL); + if (!name) + return NULL; kn = kmem_cache_zalloc(kernfs_node_cache, GFP_KERNEL); if (!kn) @@ -538,7 +536,7 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root, err_out2: kmem_cache_free(kernfs_node_cache, kn); err_out1: - kfree_const(dup_name); + kfree_const(name); return NULL; } @@ -1285,9 +1283,7 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent, kn->ns = new_ns; if (new_name) { - if (!(kn->flags & KERNFS_STATIC_NAME)) - old_name = kn->name; - kn->flags &= ~KERNFS_STATIC_NAME; + old_name = kn->name; kn->name = new_name; } diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index ddc9f9612f16..b684e8a132e6 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -901,7 +901,6 @@ const struct file_operations kernfs_file_fops = { * @ops: kernfs operations for the file * @priv: private data for the file * @ns: optional namespace tag of the file - * @name_is_static: don't copy file name * @key: lockdep key for the file's active_ref, %NULL to disable lockdep * * Returns the created node on success, ERR_PTR() value on error. @@ -911,7 +910,6 @@ struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent, umode_t mode, loff_t size, const struct kernfs_ops *ops, void *priv, const void *ns, - bool name_is_static, struct lock_class_key *key) { struct kernfs_node *kn; @@ -919,8 +917,6 @@ struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent, int rc; flags = KERNFS_FILE; - if (name_is_static) - flags |= KERNFS_STATIC_NAME; kn = kernfs_new_node(parent, name, (mode & S_IALLUGO) | S_IFREG, flags); if (!kn) -- cgit v1.2.3