VFS: merge lookup_one_qstr_excl_raw() back into lookup_one_qstr_excl()

The effect of lookup_one_qstr_excl_raw() can be achieved by passing
LOOKUP_CREATE() to lookup_one_qstr_excl() - we don't need a separate
function.

Signed-off-by: NeilBrown <neil@brown.name>
Link: https://lore.kernel.org/20250608230952.20539-2-neil@brown.name
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: neilbrown

fs/namei.c

@@ -1665,17 +1665,25 @@ static struct dentry *lookup_dcache(const struct qstr *name,
 	return dentry;
 }
 
-static struct dentry *lookup_one_qstr_excl_raw(const struct qstr *name,
-					       struct dentry *base,
-					       unsigned int flags)
+/*
+ * Parent directory has inode locked exclusive.  This is one
+ * and only case when ->lookup() gets called on non in-lookup
+ * dentries - as the matter of fact, this only gets called
+ * when directory is guaranteed to have no in-lookup children
+ * at all.
+ * Will return -ENOENT if name isn't found and LOOKUP_CREATE wasn't passed.
+ * Will return -EEXIST if name is found and LOOKUP_EXCL was passed.
+ */
+struct dentry *lookup_one_qstr_excl(const struct qstr *name,
+				    struct dentry *base, unsigned int flags)
 {
 	struct dentry *dentry;
 	struct dentry *old;
 	struct inode *dir;
 
 	dentry = lookup_dcache(name, base, flags);
 	if (dentry)
-		return dentry;
+		goto found;
 
 	/* Don't create child dentry for a dead directory. */
 	dir = base->d_inode;
@@ -1691,24 +1699,7 @@ static struct dentry *lookup_one_qstr_excl_raw(const struct qstr *name,
 		dput(dentry);
 		dentry = old;
 	}
-	return dentry;
-}
-
-/*
- * Parent directory has inode locked exclusive.  This is one
- * and only case when ->lookup() gets called on non in-lookup
- * dentries - as the matter of fact, this only gets called
- * when directory is guaranteed to have no in-lookup children
- * at all.
- * Will return -ENOENT if name isn't found and LOOKUP_CREATE wasn't passed.
- * Will return -EEXIST if name is found and LOOKUP_EXCL was passed.
- */
-struct dentry *lookup_one_qstr_excl(const struct qstr *name,
-				    struct dentry *base, unsigned int flags)
-{
-	struct dentry *dentry;
-
-	dentry = lookup_one_qstr_excl_raw(name, base, flags);
+found:
 	if (IS_ERR(dentry))
 		return dentry;
 	if (d_is_negative(dentry) && !(flags & LOOKUP_CREATE)) {
@@ -2790,7 +2781,7 @@ struct dentry *kern_path_locked_negative(const char *name, struct path *path)
 	if (unlikely(type != LAST_NORM))
 		return ERR_PTR(-EINVAL);
 	inode_lock_nested(parent_path.dentry->d_inode, I_MUTEX_PARENT);
-	d = lookup_one_qstr_excl_raw(&last, parent_path.dentry, 0);
+	d = lookup_one_qstr_excl(&last, parent_path.dentry, LOOKUP_CREATE);
 	if (IS_ERR(d)) {
 		inode_unlock(parent_path.dentry->d_inode);
 		return d;