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[PATCH] openpromfs: factorize out

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"Move" "common code" out to PTR_NOD, which does the conversion from private
pointer to node number.  This is to reduce potential casting/conversion errors
due to redundancy.  (The naming PTR_NOD follows PTR_ERR, turning a pointer
into xyz.)

[akpm@osdl.org: cleanups]
Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Engelhardt 2006-06-25 05:47:36 -07:00 committed by Linus Torvalds
parent 515decdccf
commit a04ee14636
1 changed files with 10 additions and 5 deletions
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15
fs/openpromfs/inode.c
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@ -64,6 +64,11 @@ static int openpromfs_readdir(struct file *, void *, filldir_t);
static struct dentry *openpromfs_lookup(struct inode *, struct dentry *dentry, struct nameidata *nd);
static int openpromfs_unlink (struct inode *, struct dentry *dentry);
static inline u16 ptr_nod(void *p)
{
return (long)p & 0xFFFF;
}
static ssize_t nodenum_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
@ -95,9 +100,9 @@ static ssize_t property_read(struct file *filp, char __user *buf,
char buffer[64];
if (!filp->private_data) {
node = nodes[(u16)((long)inode->u.generic_ip)].node;
node = nodes[ptr_nod(inode->u.generic_ip)].node;
i = ((u32)(long)inode->u.generic_ip) >> 16;
if ((u16)((long)inode->u.generic_ip) == aliases) {
if (ptr_nod(inode->u.generic_ip) == aliases) {
if (i >= aliases_nodes)
p = NULL;
else
@ -111,7 +116,7 @@ static ssize_t property_read(struct file *filp, char __user *buf,
return -EIO;
i = prom_getproplen (node, p);
if (i < 0) {
if ((u16)((long)inode->u.generic_ip) == aliases)
if (ptr_nod(inode->u.generic_ip) == aliases)
i = 0;
else
return -EIO;
@ -540,8 +545,8 @@ int property_release (struct inode *inode, struct file *filp)
if (!op)
return 0;
lock_kernel();
node = nodes[(u16)((long)inode->u.generic_ip)].node;
if ((u16)((long)inode->u.generic_ip) == aliases) {
node = nodes[ptr_nod(inode->u.generic_ip)].node;
if (ptr_nod(inode->u.generic_ip) == aliases) {
if ((op->flag & OPP_DIRTY) && (op->flag & OPP_STRING)) {
char *p = op->name;
int i = (op->value - op->name) - strlen (op->name) - 1;