new helper: ext2_image_size()
[~shefty/rdma-dev.git] / init / do_mounts_rd.c
index 01f1306aa26e2bfa0fd6fa273fc0754d117fa389..6212586df29ace81e239b71d01b95826cb636507 100644 (file)
@@ -54,20 +54,19 @@ identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
 {
        const int size = 512;
        struct minix_super_block *minixsb;
-       struct ext2_super_block *ext2sb;
        struct romfs_super_block *romfsb;
        struct cramfs_super *cramfsb;
        struct squashfs_super_block *squashfsb;
        int nblocks = -1;
        unsigned char *buf;
        const char *compress_name;
+       unsigned long n;
 
        buf = kmalloc(size, GFP_KERNEL);
        if (!buf)
                return -ENOMEM;
 
        minixsb = (struct minix_super_block *) buf;
-       ext2sb = (struct ext2_super_block *) buf;
        romfsb = (struct romfs_super_block *) buf;
        cramfsb = (struct cramfs_super *) buf;
        squashfsb = (struct squashfs_super_block *) buf;
@@ -150,12 +149,12 @@ identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
        }
 
        /* Try ext2 */
-       if (ext2sb->s_magic == cpu_to_le16(EXT2_SUPER_MAGIC)) {
+       n = ext2_image_size(buf);
+       if (n) {
                printk(KERN_NOTICE
                       "RAMDISK: ext2 filesystem found at block %d\n",
                       start_block);
-               nblocks = le32_to_cpu(ext2sb->s_blocks_count) <<
-                       le32_to_cpu(ext2sb->s_log_block_size);
+               nblocks = n;
                goto done;
        }