new helper: readlink_copy()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 5 insertions, 8 deletions

diff --git a/fs/namei.c b/fs/namei.c
index 617de9e..4fb52f0 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -4297,11 +4297,9 @@ SYSCALL_DEFINE2(rename, const char __user *, oldname, const char __user *, newna
 	return sys_renameat(AT_FDCWD, oldname, AT_FDCWD, newname);
 }
 
-int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen, const char *link)
+int readlink_copy(char __user *buffer, int buflen, const char *link)
 {
-	int len;
-
-	len = PTR_ERR(link);
+	int len = PTR_ERR(link);
 	if (IS_ERR(link))
 		goto out;
 
@@ -4313,7 +4311,7 @@ int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen, const c
 out:
 	return len;
 }
-EXPORT_SYMBOL(vfs_readlink);
+EXPORT_SYMBOL(readlink_copy);
 
 /*
  * A helper for ->readlink().  This should be used *ONLY* for symlinks that
@@ -4331,7 +4329,7 @@ int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen)
 	if (IS_ERR(cookie))
 		return PTR_ERR(cookie);
 
-	res = vfs_readlink(dentry, buffer, buflen, nd_get_link(&nd));
+	res = readlink_copy(buffer, buflen, nd_get_link(&nd));
 	if (dentry->d_inode->i_op->put_link)
 		dentry->d_inode->i_op->put_link(dentry, &nd, cookie);
 	return res;
@@ -4356,8 +4354,7 @@ static char *page_getlink(struct dentry * dentry, struct page **ppage)
 int page_readlink(struct dentry *dentry, char __user *buffer, int buflen)
 {
 	struct page *page = NULL;
-	char *s = page_getlink(dentry, &page);
-	int res = vfs_readlink(dentry,buffer,buflen,s);
+	int res = readlink_copy(buffer, buflen, page_getlink(dentry, &page));
 	if (page) {
 		kunmap(page);
 		page_cache_release(page);