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authorDavid Howells <dhowells@redhat.com>2017-07-04 18:25:22 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2017-07-06 09:27:09 +0200
commitcdf01226b26e98c79c13b335fbe0cbbbe850cf44 (patch)
tree979318b9a3b69b03b39f6e66d3ffa75b82565ddc /fs/dcache.c
parentVFS: Make get_filesystem() return the affected filesystem (diff)
downloadlinux-cdf01226b26e98c79c13b335fbe0cbbbe850cf44.tar.xz
linux-cdf01226b26e98c79c13b335fbe0cbbbe850cf44.zip
VFS: Provide empty name qstr
Provide an empty name (ie. "") qstr for general use. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/dcache.c')
-rw-r--r--fs/dcache.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index a9f995f6859e..95efb7b2bf84 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -90,6 +90,11 @@ EXPORT_SYMBOL(rename_lock);
static struct kmem_cache *dentry_cache __read_mostly;
+const struct qstr empty_name = QSTR_INIT("", 0);
+EXPORT_SYMBOL(empty_name);
+const struct qstr slash_name = QSTR_INIT("/", 1);
+EXPORT_SYMBOL(slash_name);
+
/*
* This is the single most critical data structure when it comes
* to the dcache: the hashtable for lookups. Somebody should try
@@ -1578,8 +1583,7 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
*/
dentry->d_iname[DNAME_INLINE_LEN-1] = 0;
if (unlikely(!name)) {
- static const struct qstr anon = QSTR_INIT("/", 1);
- name = &anon;
+ name = &slash_name;
dname = dentry->d_iname;
} else if (name->len > DNAME_INLINE_LEN-1) {
size_t size = offsetof(struct external_name, name[1]);