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Date: Mon, 7 Jan 2008 15:52:59 +0100
From: Jan Kara <jack@...e.cz>
To: marcin.slusarz@...il.com
Cc: LKML <linux-kernel@...r.kernel.org>,
Ben Fennema <bfennema@...con.csc.calpoly.edu>,
Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 5/7] udf: convert byte order of constant instead of
variable
On Sun 06-01-08 02:21:51, marcin.slusarz@...il.com wrote:
> convert byte order of constant instead of variable,
> which can be done at compile time (vs run time)
>
> Signed-off-by: Marcin Slusarz <marcin.slusarz@...il.com>
OK, makes sence. Acked-by: Jan Kara <jack@...e.cz>
Honza
> ---
> fs/udf/directory.c | 4 ++--
> fs/udf/inode.c | 16 ++++++++--------
> fs/udf/misc.c | 12 ++++++------
> fs/udf/super.c | 16 ++++++++--------
> 4 files changed, 24 insertions(+), 24 deletions(-)
>
> diff --git a/fs/udf/directory.c b/fs/udf/directory.c
> index d4ae723..598bcf7 100644
> --- a/fs/udf/directory.c
> +++ b/fs/udf/directory.c
> @@ -225,7 +225,7 @@ struct fileIdentDesc *udf_get_fileident(void *buffer, int bufsize, int *offset)
> if ((*offset > 0) && (*offset < bufsize))
> ptr += *offset;
> fi = (struct fileIdentDesc *)ptr;
> - if (le16_to_cpu(fi->descTag.tagIdent) != TAG_IDENT_FID) {
> + if (fi->descTag.tagIdent != cpu_to_le16(TAG_IDENT_FID)) {
> udf_debug("0x%x != TAG_IDENT_FID\n",
> le16_to_cpu(fi->descTag.tagIdent));
> udf_debug("offset: %u sizeof: %lu bufsize: %u\n",
> @@ -262,7 +262,7 @@ static extent_ad *udf_get_fileextent(void *buffer, int bufsize, int *offset)
>
> fe = (struct fileEntry *)buffer;
>
> - if (le16_to_cpu(fe->descTag.tagIdent) != TAG_IDENT_FE) {
> + if (fe->descTag.tagIdent != cpu_to_le16(TAG_IDENT_FE)) {
> udf_debug("0x%x != TAG_IDENT_FE\n",
> le16_to_cpu(fe->descTag.tagIdent));
> return NULL;
> diff --git a/fs/udf/inode.c b/fs/udf/inode.c
> index 6751945..bb73635 100644
> --- a/fs/udf/inode.c
> +++ b/fs/udf/inode.c
> @@ -1103,7 +1103,7 @@ static void __udf_read_inode(struct inode *inode)
>
> fe = (struct fileEntry *)bh->b_data;
>
> - if (le16_to_cpu(fe->icbTag.strategyType) == 4096) {
> + if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
> struct buffer_head *ibh = NULL, *nbh = NULL;
> struct indirectEntry *ie;
>
> @@ -1140,7 +1140,7 @@ static void __udf_read_inode(struct inode *inode)
> } else {
> brelse(ibh);
> }
> - } else if (le16_to_cpu(fe->icbTag.strategyType) != 4) {
> + } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
> printk(KERN_ERR "udf: unsupported strategy type: %d\n",
> le16_to_cpu(fe->icbTag.strategyType));
> brelse(bh);
> @@ -1164,9 +1164,9 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
> fe = (struct fileEntry *)bh->b_data;
> efe = (struct extendedFileEntry *)bh->b_data;
>
> - if (le16_to_cpu(fe->icbTag.strategyType) == 4)
> + if (fe->icbTag.strategyType == cpu_to_le16(4))
> UDF_I_STRAT4096(inode) = 0;
> - else /* if (le16_to_cpu(fe->icbTag.strategyType) == 4096) */
> + else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
> UDF_I_STRAT4096(inode) = 1;
>
> UDF_I_ALLOCTYPE(inode) = le16_to_cpu(fe->icbTag.flags) &
> @@ -1177,7 +1177,7 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
> UDF_I_LENALLOC(inode) = 0;
> UDF_I_NEXT_ALLOC_BLOCK(inode) = 0;
> UDF_I_NEXT_ALLOC_GOAL(inode) = 0;
> - if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_EFE) {
> + if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
> UDF_I_EFE(inode) = 1;
> UDF_I_USE(inode) = 0;
> if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
> @@ -1189,7 +1189,7 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
> bh->b_data + sizeof(struct extendedFileEntry),
> inode->i_sb->s_blocksize -
> sizeof(struct extendedFileEntry));
> - } else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_FE) {
> + } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
> UDF_I_EFE(inode) = 0;
> UDF_I_USE(inode) = 0;
> if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
> @@ -1199,7 +1199,7 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
> }
> memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct fileEntry),
> inode->i_sb->s_blocksize - sizeof(struct fileEntry));
> - } else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) {
> + } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
> UDF_I_EFE(inode) = 0;
> UDF_I_USE(inode) = 1;
> UDF_I_LENALLOC(inode) = le32_to_cpu(
> @@ -1458,7 +1458,7 @@ static int udf_update_inode(struct inode *inode, int do_sync)
> fe = (struct fileEntry *)bh->b_data;
> efe = (struct extendedFileEntry *)bh->b_data;
>
> - if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) {
> + if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
> struct unallocSpaceEntry *use =
> (struct unallocSpaceEntry *)bh->b_data;
>
> diff --git a/fs/udf/misc.c b/fs/udf/misc.c
> index badc8de..54a380d 100644
> --- a/fs/udf/misc.c
> +++ b/fs/udf/misc.c
> @@ -74,8 +74,8 @@ struct genericFormat *udf_add_extendedattr(struct inode *inode, uint32_t size,
>
> if (UDF_I_LENEATTR(inode)) {
> /* check checksum/crc */
> - if (le16_to_cpu(eahd->descTag.tagIdent) !=
> - TAG_IDENT_EAHD ||
> + if (eahd->descTag.tagIdent !=
> + cpu_to_le16(TAG_IDENT_EAHD) ||
> le32_to_cpu(eahd->descTag.tagLocation) !=
> UDF_I_LOCATION(inode).logicalBlockNum)
> return NULL;
> @@ -161,8 +161,8 @@ struct genericFormat *udf_get_extendedattr(struct inode *inode, uint32_t type,
> eahd = (struct extendedAttrHeaderDesc *)ea;
>
> /* check checksum/crc */
> - if (le16_to_cpu(eahd->descTag.tagIdent) !=
> - TAG_IDENT_EAHD ||
> + if (eahd->descTag.tagIdent !=
> + cpu_to_le16(TAG_IDENT_EAHD) ||
> le32_to_cpu(eahd->descTag.tagLocation) !=
> UDF_I_LOCATION(inode).logicalBlockNum)
> return NULL;
> @@ -233,8 +233,8 @@ struct buffer_head *udf_read_tagged(struct super_block *sb, uint32_t block,
> }
>
> /* Verify the tag version */
> - if (le16_to_cpu(tag_p->descVersion) != 0x0002U &&
> - le16_to_cpu(tag_p->descVersion) != 0x0003U) {
> + if (tag_p->descVersion != cpu_to_le16(0x0002U) &&
> + tag_p->descVersion != cpu_to_le16(0x0003U)) {
> udf_debug("tag version 0x%04x != 0x0002 || 0x0003 block %d\n",
> le16_to_cpu(tag_p->descVersion), block);
> goto error_out;
> diff --git a/fs/udf/super.c b/fs/udf/super.c
> index fadf5e7..a366d97 100644
> --- a/fs/udf/super.c
> +++ b/fs/udf/super.c
> @@ -1002,20 +1002,20 @@ static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
> le32_to_cpu(p->partitionLength); /* blocks */
> map->s_partition_root =
> le32_to_cpu(p->partitionStartingLocation);
> - if (le32_to_cpu(p->accessType) ==
> - PD_ACCESS_TYPE_READ_ONLY)
> + if (p->accessType ==
> + cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
> map->s_partition_flags |=
> UDF_PART_FLAG_READ_ONLY;
> - if (le32_to_cpu(p->accessType) ==
> - PD_ACCESS_TYPE_WRITE_ONCE)
> + if (p->accessType ==
> + cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
> map->s_partition_flags |=
> UDF_PART_FLAG_WRITE_ONCE;
> - if (le32_to_cpu(p->accessType) ==
> - PD_ACCESS_TYPE_REWRITABLE)
> + if (p->accessType ==
> + cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
> map->s_partition_flags |=
> UDF_PART_FLAG_REWRITABLE;
> - if (le32_to_cpu(p->accessType) ==
> - PD_ACCESS_TYPE_OVERWRITABLE)
> + if (p->accessType ==
> + cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
> map->s_partition_flags |=
> UDF_PART_FLAG_OVERWRITABLE;
>
> --
> 1.5.3.7
>
--
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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