fat: remove FAT_FIRST_ENT macro

[sfrench/cifs-2.6.git] / fs / fat / inode.c

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index c0b5b5c3373bd967f86697f9aa39b75942399877..269e7b91b8b131d58c573887512e4f0681df5ae2 100644 (file)
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1803,11 +1803,15 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
        fat_ent_access_init(sb);
 
        /*
-        * The low byte of FAT's first entry must have same value with
-        * media-field.  But in real world, too many devices is
-        * writing wrong value.  So, removed that validity check.
+        * The low byte of the first FAT entry must have the same value as
+        * the media field of the boot sector. But in real world, too many
+        * devices are writing wrong values. So, removed that validity check.
         *
-        * if (FAT_FIRST_ENT(sb, media) != first)
+        * The removed check compared the first FAT entry to a value dependent
+        * on the media field like this:
+        * == (0x0F00 | media), for FAT12
+        * == (0XFF00 | media), for FAT16
+        * == (0x0FFFFF | media), for FAT32
         */
 
        error = -EINVAL;