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SubjectRe: Subject: [PATCH 01/16] Squashfs: inode operations
On Fri, 17 Oct 2008, Phillip Lougher wrote:
> --- /dev/null
> +++ b/fs/squashfs/inode.c

> + case SQUASHFS_BLKDEV_TYPE:
> + case SQUASHFS_CHRDEV_TYPE: {
> + struct squashfs_dev_inode *inodep = &id.dev;
> + unsigned int rdev;
> +
> + if (!squashfs_read_metadata(s, inodep, block, offset,
> + sizeof(*inodep), &next_block, &next_offset))
> + goto failed_read;
> +
> + i->i_nlink = le32_to_cpu(inodep->nlink);
> + i->i_mode |= (type == SQUASHFS_CHRDEV_TYPE) ? S_IFCHR : S_IFBLK;
> + rdev = le32_to_cpu(inodep->rdev);
> + init_special_inode(i, le16_to_cpu(i->i_mode),
^^^^^^^^^^^
> + new_decode_dev(rdev));
> +
> + TRACE("Device inode %x:%x, rdev %x\n",
> + SQUASHFS_INODE_BLK(inode), offset, rdev);
> + break;
> + }
> + case SQUASHFS_FIFO_TYPE:
> + case SQUASHFS_SOCKET_TYPE: {
> + struct squashfs_ipc_inode *inodep = &id.ipc;
> +
> + if (!squashfs_read_metadata(s, inodep, block, offset,
> + sizeof(*inodep), &next_block, &next_offset))
> + goto failed_read;
> +
> + i->i_nlink = le32_to_cpu(inodep->nlink);
> + i->i_mode |= (type == SQUASHFS_FIFO_TYPE) ? S_IFIFO : S_IFSOCK;
> + init_special_inode(i, le16_to_cpu(i->i_mode), 0);
^^^^^^^^^^^
> + break;

Sparse with endian checking (make C=2 CHECKFLAGS="-D__CHECK_ENDIAN__") complains
about these:

| fs/squashfs/inode.c:306:25: warning: cast to restricted __le16
| fs/squashfs/inode.c:324:25: warning: cast to restricted __le16

and it seems to be right, as inode.i_mode is not __le16. I think the le16_to_cpu()
should be removed.

BTW, there are also a few sparse warnings about different signednesses, so you
probably want to run sparse yourself, too.

With kind regards,

Geert Uytterhoeven
Software Architect

Sony Techsoft Centre Europe
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium

Phone: +32 (0)2 700 8453
Fax: +32 (0)2 700 8622
E-mail: Geert.Uytterhoeven@sonycom.com
Internet: http://www.sony-europe.com/

A division of Sony Europe (Belgium) N.V.
VAT BE 0413.825.160 · RPR Brussels
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