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| author | Jan Engelhardt <jengelh@gmx.de> | 2006-06-25 05:47:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-25 10:01:05 -0700 |
| commit | a04ee14636fa339c4609766bd6173629d4f9026e (patch) | |
| tree | 2a0e960d35f9cc586d128578adbf4a11aac45e40 /fs | |
| parent | 515decdccf81cfbf5273d7f0085aea954ecd26c4 (diff) | |
| download | lwn-a04ee14636fa339c4609766bd6173629d4f9026e.tar.gz lwn-a04ee14636fa339c4609766bd6173629d4f9026e.zip | |
[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')
| -rw-r--r-- | fs/openpromfs/inode.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c index 3bd2eeccb2ad..efc7c91128af 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; |