[PATCH] FAT: small cleanup

fs/fat/file.c

@@ -50,7 +50,7 @@ int fat_get_block(struct inode *inode, sector_t iblock,
 		BUG();
 		return -EIO;
 	}
-	if (!((unsigned long)iblock % MSDOS_SB(sb)->sec_per_clus)) {
+	if (!((unsigned long)iblock & (MSDOS_SB(sb)->sec_per_clus - 1))) {
 		int error;
 
 		error = fat_add_cluster(inode);

fs/fat/misc.c

@@ -205,7 +205,7 @@ struct buffer_head *fat_extend_dir(struct inode *inode)
 	if (inode->i_size & (sb->s_blocksize - 1)) {
 		fat_fs_panic(sb, "Odd directory size");
 		inode->i_size = (inode->i_size + sb->s_blocksize)
-			& ~(sb->s_blocksize - 1);
+			& ~((loff_t)sb->s_blocksize - 1);
 	}
 	inode->i_size += MSDOS_SB(sb)->cluster_size;
 	MSDOS_I(inode)->mmu_private += MSDOS_SB(sb)->cluster_size;