[PATCH RFC 6/7] fs/ntfs: support `DISABLE_FS_CSUM_VERIFICATION` config option

[Hrutvik Kanabar]

From: Hrutvik Kanabar <hrutvik@xxxxxxxxxx>

When `DISABLE_FS_CSUM_VERIFICATION` is enabled, bypass checksum
verification in `is_boot_sector_ntfs`.

Signed-off-by: Hrutvik Kanabar <hrutvik@xxxxxxxxxx>
---
 fs/ntfs/super.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 001f4e053c85..428c65ce9a80 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -582,7 +582,8 @@ static bool is_boot_sector_ntfs(const struct super_block *sb,
 
 		for (i = 0, u = (le32*)b; u < (le32*)(&b->checksum); ++u)
 			i += le32_to_cpup(u);
-		if (le32_to_cpu(b->checksum) != i)
+		if (!IS_ENABLED(CONFIG_DISABLE_FS_CSUM_VERIFICATION) &&
+		    le32_to_cpu(b->checksum) != i)
 			ntfs_warning(sb, "Invalid boot sector checksum.");
 	}
 	/* Check OEMidentifier is "NTFS    " */
-- 
2.38.0.413.g74048e4d9e-goog