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Subject[PATCH] remove some usesless casts
Squashfs is extremely cast-happy.  This patch makes it less so.

Jörn

--
If you're willing to restrict the flexibility of your approach,
you can almost always do something better.
-- John Carmack


Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
---

fs/squashfs/inode.c | 63 ++++++++++++++++++++++------------------------------
1 files changed, 27 insertions(+), 36 deletions(-)

--- linux-2.6.12-rc2cow/fs/squashfs/inode.c~squashfs_cu1 2005-04-20 07:52:46.000000000 +0200
+++ linux-2.6.12-rc2cow/fs/squashfs/inode.c 2005-04-20 08:11:10.254367656 +0200
@@ -111,7 +111,7 @@ struct inode_operations squashfs_dir_ino
static struct buffer_head *get_block_length(struct super_block *s,
int *cur_index, int *offset, int *c_byte)
{
- squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+ squashfs_sb_info *msBlk = s->s_fs_info;
unsigned short temp;
struct buffer_head *bh;

@@ -176,7 +176,7 @@ unsigned int squashfs_read_data(struct s
unsigned int index, unsigned int length,
unsigned int *next_index)
{
- squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+ squashfs_sb_info *msBlk = s->s_fs_info;
struct buffer_head *bh[((SQUASHFS_FILE_MAX_SIZE - 1) >>
msBlk->devblksize_log2) + 2];
unsigned int offset = index & ((1 << msBlk->devblksize_log2) - 1);
@@ -285,7 +285,7 @@ int squashfs_get_cached_block(struct sup
int length, unsigned int *next_block,
unsigned int *next_offset)
{
- squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+ squashfs_sb_info *msBlk = s->s_fs_info;
int n, i, bytes, return_length = length;
unsigned int next_index;

@@ -390,7 +390,7 @@ static int get_fragment_location(struct
unsigned int *fragment_start_block,
unsigned int *fragment_size)
{
- squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+ squashfs_sb_info *msBlk = s->s_fs_info;
unsigned int start_block =
msBlk->fragment_index[SQUASHFS_FRAGMENT_INDEX(fragment)];
int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET(fragment);
@@ -434,7 +434,7 @@ static struct squashfs_fragment_cache *g
int length)
{
int i, n;
- squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+ squashfs_sb_info *msBlk = s->s_fs_info;

for (;;) {
down(&msBlk->fragment_mutex);
@@ -466,8 +466,7 @@ static struct squashfs_fragment_cache *g
SQUASHFS_CACHED_FRAGMENTS;

if (msBlk->fragment[i].data == NULL)
- if (!(msBlk->fragment[i].data =
- (unsigned char *) kmalloc
+ if (!(msBlk->fragment[i].data = kmalloc
(SQUASHFS_FILE_MAX_SIZE,
GFP_KERNEL))) {
ERROR("Failed to allocate fragment "
@@ -509,7 +508,7 @@ static struct squashfs_fragment_cache *g
static struct inode *squashfs_new_inode(struct super_block *s,
squashfs_base_inode_header *inodeb, unsigned int ino)
{
- squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+ squashfs_sb_info *msBlk = s->s_fs_info;
squashfs_super_block *sBlk = &msBlk->sBlk;
struct inode *i = new_inode(s);

@@ -535,7 +534,7 @@ static struct inode *squashfs_new_inode(
static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode)
{
struct inode *i;
- squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+ squashfs_sb_info *msBlk = s->s_fs_info;
squashfs_super_block *sBlk = &msBlk->sBlk;
unsigned int block = SQUASHFS_INODE_BLK(inode) +
sBlk->inode_table_start;
@@ -837,13 +836,12 @@ static int squashfs_fill_super(struct su

TRACE("Entered squashfs_read_superblock\n");

- if (!(s->s_fs_info = (void *) kmalloc(sizeof(squashfs_sb_info),
- GFP_KERNEL))) {
+ if (!(s->s_fs_info = kmalloc(sizeof(squashfs_sb_info), GFP_KERNEL))) {
ERROR("Failed to allocate superblock\n");
return -ENOMEM;
}
memset(s->s_fs_info, 0, sizeof(squashfs_sb_info));
- msBlk = (squashfs_sb_info *) s->s_fs_info;
+ msBlk = s->s_fs_info;
sBlk = &msBlk->sBlk;

msBlk->devblksize = sb_min_blocksize(s, BLOCK_SIZE);
@@ -914,8 +912,7 @@ static int squashfs_fill_super(struct su
s->s_op = &squashfs_ops;

/* Init inode_table block pointer array */
- if (!(msBlk->block_cache = (squashfs_cache *)
- kmalloc(sizeof(squashfs_cache) *
+ if (!(msBlk->block_cache = kmalloc(sizeof(squashfs_cache) *
SQUASHFS_CACHED_BLKS, GFP_KERNEL))) {
ERROR("Failed to allocate block cache\n");
goto failed_mount;
@@ -931,15 +928,14 @@ static int squashfs_fill_super(struct su
SQUASHFS_METADATA_SIZE :
sBlk->block_size;

- if (!(msBlk->read_data = (char *) kmalloc(msBlk->read_size,
- GFP_KERNEL))) {
+ if (!(msBlk->read_data = kmalloc(msBlk->read_size, GFP_KERNEL))) {
ERROR("Failed to allocate read_data block\n");
goto failed_mount;
}

/* Allocate read_page block */
if (sBlk->block_size > PAGE_CACHE_SIZE) {
- if (!(msBlk->read_page = (char *) kmalloc(sBlk->block_size,
+ if (!(msBlk->read_page = kmalloc(sBlk->block_size,
GFP_KERNEL))) {
ERROR("Failed to allocate read_page block\n");
goto failed_mount;
@@ -948,7 +944,7 @@ static int squashfs_fill_super(struct su
msBlk->read_page = NULL;

/* Allocate uid and gid tables */
- if (!(msBlk->uid = (squashfs_uid *) kmalloc((sBlk->no_uids +
+ if (!(msBlk->uid = kmalloc((sBlk->no_uids +
sBlk->no_guids) * sizeof(squashfs_uid),
GFP_KERNEL))) {
ERROR("Failed to allocate uid/gid table\n");
@@ -982,9 +978,7 @@ static int squashfs_fill_super(struct su
if (sBlk->s_major == 1 && squashfs_1_0_supported(msBlk))
goto allocate_root;

- if (!(msBlk->fragment = (struct squashfs_fragment_cache *)
- kmalloc(sizeof(struct
- squashfs_fragment_cache) *
+ if (!(msBlk->fragment = kmalloc(sizeof(struct squashfs_fragment_cache) *
SQUASHFS_CACHED_FRAGMENTS,
GFP_KERNEL))) {
ERROR("Failed to allocate fragment block cache\n");
@@ -1000,8 +994,7 @@ static int squashfs_fill_super(struct su
msBlk->next_fragment = 0;

/* Allocate fragment index table */
- if (!(msBlk->fragment_index = (squashfs_fragment_index *)
- kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES
+ if (!(msBlk->fragment_index = kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES
(sBlk->fragments), GFP_KERNEL))) {
ERROR("Failed to allocate uid/gid table\n");
goto failed_mount;
@@ -1127,7 +1120,7 @@ static unsigned int read_blocklist(struc
int readahead_blks, char *block_list,
unsigned short **block_p, unsigned int *bsize)
{
- squashfs_sb_info *msBlk = (squashfs_sb_info *)inode->i_sb->s_fs_info;
+ squashfs_sb_info *msBlk = inode->i_sb->s_fs_info;
unsigned int *block_listp;
int i = 0;
int block_ptr = SQUASHFS_I(inode)->block_list_start;
@@ -1182,7 +1175,7 @@ static unsigned int read_blocklist(struc
static int squashfs_readpage(struct file *file, struct page *page)
{
struct inode *inode = page->mapping->host;
- squashfs_sb_info *msBlk = (squashfs_sb_info *)inode->i_sb->s_fs_info;
+ squashfs_sb_info *msBlk = inode->i_sb->s_fs_info;
squashfs_super_block *sBlk = &msBlk->sBlk;
unsigned char block_list[SIZE];
unsigned int bsize, block, i = 0, bytes = 0, byte_offset = 0;
@@ -1297,7 +1290,7 @@ skip_read:
static int squashfs_readpage4K(struct file *file, struct page *page)
{
struct inode *inode = page->mapping->host;
- squashfs_sb_info *msBlk = (squashfs_sb_info *)inode->i_sb->s_fs_info;
+ squashfs_sb_info *msBlk = inode->i_sb->s_fs_info;
squashfs_super_block *sBlk = &msBlk->sBlk;
unsigned char block_list[SIZE];
unsigned int bsize, block, bytes = 0;
@@ -1359,7 +1352,7 @@ static int get_dir_index_using_offset(st
unsigned int index_offset, int i_count,
long long f_pos)
{
- squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+ squashfs_sb_info *msBlk = s->s_fs_info;
squashfs_super_block *sBlk = &msBlk->sBlk;
int i, length = 0;
squashfs_dir_index index;
@@ -1406,7 +1399,7 @@ static int get_dir_index_using_name(stru
unsigned int index_offset, int i_count,
const char *name, int size)
{
- squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+ squashfs_sb_info *msBlk = s->s_fs_info;
squashfs_super_block *sBlk = &msBlk->sBlk;
int i, length = 0;
char buffer[sizeof(squashfs_dir_index) + SQUASHFS_NAME_LEN + 1];
@@ -1453,7 +1446,7 @@ static int get_dir_index_using_name(stru
static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir)
{
struct inode *i = file->f_dentry->d_inode;
- squashfs_sb_info *msBlk = (squashfs_sb_info *)i->i_sb->s_fs_info;
+ squashfs_sb_info *msBlk = i->i_sb->s_fs_info;
squashfs_super_block *sBlk = &msBlk->sBlk;
int next_block = SQUASHFS_I(i)->start_block +
sBlk->directory_table_start,
@@ -1562,7 +1555,7 @@ static struct dentry *squashfs_lookup(st
const unsigned char *name = dentry->d_name.name;
int len = dentry->d_name.len;
struct inode *inode = NULL;
- squashfs_sb_info *msBlk = (squashfs_sb_info *)i->i_sb->s_fs_info;
+ squashfs_sb_info *msBlk = i->i_sb->s_fs_info;
squashfs_super_block *sBlk = &msBlk->sBlk;
int next_block = SQUASHFS_I(i)->start_block +
sBlk->directory_table_start,
@@ -1666,7 +1659,7 @@ static void squashfs_put_super(struct su
int i;

if (s->s_fs_info) {
- squashfs_sb_info *sbi = (squashfs_sb_info *) s->s_fs_info;
+ squashfs_sb_info *sbi = s->s_fs_info;
if (sbi->block_cache)
for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
if (sbi->block_cache[i].block !=
@@ -1703,8 +1696,7 @@ static int __init init_squashfs_fs(void)
printk(KERN_INFO "squashfs: version 2.1 (2005/03/14) "
"Phillip Lougher\n");

- if (!(stream.workspace = (char *)
- vmalloc(zlib_inflate_workspacesize()))) {
+ if (!(stream.workspace = vmalloc(zlib_inflate_workspacesize()))) {
ERROR("Failed to allocate zlib workspace\n");
destroy_inodecache();
return -ENOMEM;
@@ -1733,8 +1725,7 @@ static kmem_cache_t * squashfs_inode_cac
static struct inode *squashfs_alloc_inode(struct super_block *sb)
{
struct squashfs_inode_info *ei;
- ei = (struct squashfs_inode_info *)
- kmem_cache_alloc(squashfs_inode_cachep, SLAB_KERNEL);
+ ei = kmem_cache_alloc(squashfs_inode_cachep, SLAB_KERNEL);
if (!ei)
return NULL;
return &ei->vfs_inode;
@@ -1749,7 +1740,7 @@ static void squashfs_destroy_inode(struc

static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
{
- struct squashfs_inode_info *ei = (struct squashfs_inode_info *) foo;
+ struct squashfs_inode_info *ei = foo;

if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
SLAB_CTOR_CONSTRUCTOR)
-
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