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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-03-23 16:36:45 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-03-31 16:03:16 -0400 |
| commit | 39429c5e4a2c56a39c9a1c9bdad54431c63104b0 (patch) | |
| tree | 06abc2a4ff8d323b0358b768a71c7b651c3229f3 /init/do_mounts_rd.c | |
| parent | 2f99c36986ff27a86f06f27212c5f5fa8c7164a3 (diff) | |
| download | lwn-39429c5e4a2c56a39c9a1c9bdad54431c63104b0.tar.gz lwn-39429c5e4a2c56a39c9a1c9bdad54431c63104b0.zip | |
new helper: ext2_image_size()
... implemented that way since the next commit will leave it
almost alone in ext2_fs.h - most of the file (including
struct ext2_super_block) is going to move to fs/ext2/ext2.h.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'init/do_mounts_rd.c')
| -rw-r--r-- | init/do_mounts_rd.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c index 01f1306aa26e..6212586df29a 100644 --- a/init/do_mounts_rd.c +++ b/init/do_mounts_rd.c @@ -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; } |