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authorJan Engelhardt <jengelh@gmx.de>2006-06-25 05:47:36 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-25 10:01:05 -0700
commita04ee14636fa339c4609766bd6173629d4f9026e (patch)
tree2a0e960d35f9cc586d128578adbf4a11aac45e40 /fs/openpromfs
parent515decdccf81cfbf5273d7f0085aea954ecd26c4 (diff)
downloadlinux-a04ee14636fa339c4609766bd6173629d4f9026e.tar.gz
[PATCH] openpromfs: factorize out
"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>
Diffstat (limited to 'fs/openpromfs')
-rw-r--r--fs/openpromfs/inode.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index 3bd2eeccb2a..efc7c91128a 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -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;