svn commit: [25844] trunk/busybox/util-linux

[vda at busybox.net]

Author: vda
Date: 2009-03-28 02:18:49 +0000 (Sat, 28 Mar 2009)
New Revision: 25844

Log:
mkfs.vfat: small tweak to comments



Modified:
   trunk/busybox/util-linux/mkfs_vfat.c


Changeset:
Modified: trunk/busybox/util-linux/mkfs_vfat.c
===================================================================
--- trunk/busybox/util-linux/mkfs_vfat.c	2009-03-28 02:13:01 UTC (rev 25843)
+++ trunk/busybox/util-linux/mkfs_vfat.c	2009-03-28 02:18:49 UTC (rev 25844)
@@ -429,6 +429,7 @@
 	// Write filesystem image sequentially (no seeking)
 	//
 	{
+		// (a | b) is poor man's max(a, b)
 		unsigned bufsize = reserved_sect;
 		//bufsize |= sect_per_fat; // can be quite large
 		bufsize |= 2; // use this instead
@@ -449,9 +450,10 @@
 		if (volume_size_sect <= 0xffff)
 			STORE_LE(boot_blk->volume_size_sect, volume_size_sect);
 		STORE_LE(boot_blk->media_byte, media_byte);
-		// Bad: this would make Linux to think that it's fat12/16
+		// wrong: this would make Linux think that it's fat12/16:
 		//if (sect_per_fat <= 0xffff)
 		//	STORE_LE(boot_blk->sect_per_fat, sect_per_fat);
+		// works:
 		//STORE_LE(boot_blk->sect_per_fat, 0);
 		STORE_LE(boot_blk->sect_per_track, sect_per_track);
 		STORE_LE(boot_blk->heads, heads);