ext4: remove unused return value of __mb_check_buddy

[ Upstream commit 133de5a0d8f8e32b34feaa8beae7a189482f1856 ]

Remove unused return value of __mb_check_buddy.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240105092102.496631-2-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Stable-dep-of: d9ee3ff810f1 ("ext4: improve integrity checking in __mb_check_buddy by enhancing order-0 validation")
Signed-off-by: Sasha Levin <sashal@kernel.org>
[uli: backport to 4.19]
Signed-off-by: Ulrich Hecht <uli@kernel.org>
Reviewed-by: Pavel Machek <pavel@nabladev.com>

Author: Kemeng Shi

fs/ext4/mballoc.c

@@ -541,7 +541,7 @@ do {									\
 	}								\
 } while (0)
 
-static int __mb_check_buddy(struct ext4_buddy *e4b, char *file,
+static void __mb_check_buddy(struct ext4_buddy *e4b, char *file,
 				const char *function, int line)
 {
 	struct super_block *sb = e4b->bd_sb;
@@ -562,7 +562,7 @@ static int __mb_check_buddy(struct ext4_buddy *e4b, char *file,
 	{
 		static int mb_check_counter;
 		if (mb_check_counter++ % 100 != 0)
-			return 0;
+			return;
 	}
 
 	while (order > 1) {
@@ -638,7 +638,6 @@ static int __mb_check_buddy(struct ext4_buddy *e4b, char *file,
 		for (i = 0; i < pa->pa_len; i++)
 			MB_CHECK_ASSERT(mb_test_bit(k + i, buddy));
 	}
-	return 0;
 }
 #undef MB_CHECK_ASSERT
 #define mb_check_buddy(e4b) __mb_check_buddy(e4b,	\