proc: make struct proc_dir_entry::namelen unsigned int

1. namelen is declared "unsigned short" which hints for "maybe space savings".
Indeed in 2.4 struct proc_dir_entry looked like:

struct proc_dir_entry {
unsigned short low_ino;
unsigned short namelen;

Now, low_ino is "unsigned int", all savings were gone for a long time.
"struct proc_dir_entry" is not that countless to worry about it's size,
anyway.

2. converting from unsigned short to int/unsigned int can only create
problems, we better play it safe.

Space is not really conserved, because of natural alignment for the next
field. sizeof(struct proc_dir_entry) remains the same.

Signed-off-by: Alexey Dobriyan <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/proc/generic.c

···
 
 DEFINE_SPINLOCK(proc_subdir_lock);
 
-static int proc_match(int len, const char *name, struct proc_dir_entry *de)
+static int proc_match(unsigned int len, const char *name, struct proc_dir_entry *de)
 {
 	if (de->namelen != len)
 		return 0;
···
 {
 	const char     		*cp = name, *next;
 	struct proc_dir_entry	*de;
-	int			len;
+	unsigned int		len;
 
 	de = *ret;
 	if (!de)
···
 {
 	struct proc_dir_entry *ent = NULL;
 	const char *fn = name;
-	int len;
+	unsigned int len;
 
 	/* make sure name is valid */
 	if (!name || !strlen(name)) goto out;
···
 	struct proc_dir_entry **p;
 	struct proc_dir_entry *de = NULL;
 	const char *fn = name;
-	int len;
+	unsigned int len;
 
 	spin_lock(&proc_subdir_lock);
 	if (__xlate_proc_name(name, &parent, &fn) != 0) {

include/linux/proc_fs.h

···
 
 struct proc_dir_entry {
 	unsigned int low_ino;
-	unsigned short namelen;
+	unsigned int namelen;
 	const char *name;
 	mode_t mode;
 	nlink_t nlink;