ntfs: prefer IS_ERR_OR_NULL() over manual NULL check

Use IS_ERR_OR_NULL() instead of manual NULL and IS_ERR() checks.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

Author: hclee

fs/ntfs/dir.c

@@ -593,7 +593,7 @@ u64 ntfs_lookup_inode_by_name(struct ntfs_inode *dir_ni, const __le16 *uname,
 		unmap_mft_record(dir_ni);
 	kfree(name);
 	*res = NULL;
-	if (ia_vi && !IS_ERR(ia_vi))
+	if (!IS_ERR_OR_NULL(ia_vi))
 		iput(ia_vi);
 	return ERR_MREF(err);
 dir_err_out:

fs/ntfs/lcnalloc.c

@@ -721,7 +721,7 @@ switch_to_data1_zone:		search_zone = 2;
 		rl[rlpos].lcn = is_extension ? LCN_ENOENT : LCN_RL_NOT_MAPPED;
 		rl[rlpos].length = 0;
 	}
-	if (likely(folio && !IS_ERR(folio))) {
+	if (!IS_ERR_OR_NULL(folio)) {
 		if (need_writeback) {
 			ntfs_debug("Marking page dirty.");
 			folio_mark_dirty(folio);