Merge tag 'zonefs-5.20-rc1' of git://git.kernel.org/pub/scm/linux/ker…

…nel/git/dlemoal/zonefs

Pull zonefs update from Damien Le Moal:
 "A single change for this cycle to simplify handling of the memory page
  used as super block buffer during mount (from Fabio)"

* tag 'zonefs-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
  zonefs: Call page_address() on page acquired with GFP_KERNEL flag

fs/zonefs/super.c

@@ -1686,34 +1686,34 @@ static int zonefs_read_super(struct super_block *sb)
 	if (ret)
 		goto free_page;
 
-	super = kmap(page);
+	super = page_address(page);
 
 	ret = -EINVAL;
 	if (le32_to_cpu(super->s_magic) != ZONEFS_MAGIC)
-		goto unmap;
+		goto free_page;
 
 	stored_crc = le32_to_cpu(super->s_crc);
 	super->s_crc = 0;
 	crc = crc32(~0U, (unsigned char *)super, sizeof(struct zonefs_super));
 	if (crc != stored_crc) {
 		zonefs_err(sb, "Invalid checksum (Expected 0x%08x, got 0x%08x)",
 			   crc, stored_crc);
-		goto unmap;
+		goto free_page;
 	}
 
 	sbi->s_features = le64_to_cpu(super->s_features);
 	if (sbi->s_features & ~ZONEFS_F_DEFINED_FEATURES) {
 		zonefs_err(sb, "Unknown features set 0x%llx\n",
 			   sbi->s_features);
-		goto unmap;
+		goto free_page;
 	}
 
 	if (sbi->s_features & ZONEFS_F_UID) {
 		sbi->s_uid = make_kuid(current_user_ns(),
 				       le32_to_cpu(super->s_uid));
 		if (!uid_valid(sbi->s_uid)) {
 			zonefs_err(sb, "Invalid UID feature\n");
-			goto unmap;
+			goto free_page;
 		}
 	}
 
@@ -1722,7 +1722,7 @@ static int zonefs_read_super(struct super_block *sb)
 				       le32_to_cpu(super->s_gid));
 		if (!gid_valid(sbi->s_gid)) {
 			zonefs_err(sb, "Invalid GID feature\n");
-			goto unmap;
+			goto free_page;
 		}
 	}
 
@@ -1731,14 +1731,12 @@ static int zonefs_read_super(struct super_block *sb)
 
 	if (memchr_inv(super->s_reserved, 0, sizeof(super->s_reserved))) {
 		zonefs_err(sb, "Reserved area is being used\n");
-		goto unmap;
+		goto free_page;
 	}
 
 	import_uuid(&sbi->s_uuid, super->s_uuid);
 	ret = 0;
 
-unmap:
-	kunmap(page);
 free_page:
 	__free_page(page);