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kunit-fat-test-cluster-and-directory-i_pos-layout-helpers.patch removed from -mm tree

merged mm-nonmm-stable Andrew Morton 1 participant 1 message May 29

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The quilt patch titled
Subject: kunit: fat: test cluster and directory i_pos layout helpers
has been removed from the -mm tree. Its filename was
kunit-fat-test-cluster-and-directory-i_pos-layout-helpers.patch

This patch was dropped because it was merged into the mm-nonmm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Adi Nata <[email protected]>
Subject: kunit: fat: test cluster and directory i_pos layout helpers
Date: Sun, 5 Apr 2026 09:19:20 +0800

Add KUnit coverage for fat_clus_to_blknr() and fat_get_blknr_offset() using stub msdos_sb_info values so cluster-to-sector and i_pos split math stays correct.

Link https://lore.kernel.org/[email protected] open here
Signed-off-by Adi Nata <[email protected]>
Acked-by OGAWA Hirofumi <[email protected]>
Cc Christian Brauner <[email protected]>
Signed-off-by Andrew Morton <[email protected]>

---

 fs/fat/fat_test.c |   33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
fs/fat/fat_test.c renamed from fs/fat/fat_test.c~kunit-fat-test-cluster-and-directory-i_pos-layout-helpers +33 -0
@@ -20,6 +20,37 @@ static void fat_checksum_test(struct kun
 	KUNIT_EXPECT_EQ(test, fat_checksum("ABCDEFGHA  "), (u8)98);
 }
 
+static void fat_clus_to_blknr_test(struct kunit *test)
+{
+	struct msdos_sb_info sbi = {
+		.sec_per_clus = 4,
+		.data_start = 100,
+	};
+
+	KUNIT_EXPECT_EQ(test, (sector_t)100,
+			fat_clus_to_blknr(&sbi, FAT_START_ENT));
+	KUNIT_EXPECT_EQ(test, (sector_t)112, fat_clus_to_blknr(&sbi, 5));
+}
+
+static void fat_get_blknr_offset_test(struct kunit *test)
+{
+	struct msdos_sb_info sbi = {
+		.dir_per_block = 16,
+		.dir_per_block_bits = 4,
+	};
+
+	sector_t blknr;
+	int offset;
+
+	fat_get_blknr_offset(&sbi, 0, &blknr, &offset);
+	KUNIT_EXPECT_EQ(test, (sector_t)0, blknr);
+	KUNIT_EXPECT_EQ(test, 0, offset);
+
+	fat_get_blknr_offset(&sbi, (10 << 4) | 7, &blknr, &offset);
+	KUNIT_EXPECT_EQ(test, (sector_t)10, blknr);
+	KUNIT_EXPECT_EQ(test, 7, offset);
+}
+
 struct fat_timestamp_testcase {
 	const char *name;
 	struct timespec64 ts;

@@ -341,6 +372,8 @@ static void fat_truncate_atime_test(stru
 
 static struct kunit_case fat_test_cases[] = {
 	KUNIT_CASE(fat_checksum_test),
+	KUNIT_CASE(fat_clus_to_blknr_test),
+	KUNIT_CASE(fat_get_blknr_offset_test),
 	KUNIT_CASE_PARAM(fat_time_fat2unix_test, fat_time_gen_params),
 	KUNIT_CASE_PARAM(fat_time_unix2fat_test, fat_time_gen_params),
 	KUNIT_CASE_PARAM(fat_time_unix2fat_clamp_test,

_

Patches currently in -mm which might be from [email protected] are