[PATCH] Move pidmap to pspace.h

#ifndef _LINUX_PSPACE_H

#define _LINUX_PSPACE_H

#include <linux/sched.h>

#include <linux/mm.h>

#include <linux/threads.h>

#include <linux/pid.h>

struct pidmap {

       atomic_t nr_free;

       void *page;

};

#define PIDMAP_ENTRIES         ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)

#endif /* _LINUX_PSPACE_H */

#include <linux/init.h>

#include <linux/bootmem.h>

#include <linux/hash.h>

#include <linux/pspace.h>

#define pid_hashfn(nr) hash_long((unsigned long)nr, pidhash_shift)

static struct hlist_head *pid_hash;

int pid_max_min = RESERVED_PIDS + 1;

int pid_max_max = PID_MAX_LIMIT;

#define PIDMAP_ENTRIES		((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)

#define BITS_PER_PAGE		(PAGE_SIZE*8)

#define BITS_PER_PAGE_MASK	(BITS_PER_PAGE-1)

#define mk_pid(map, off)	(((map) - pidmap_array)*BITS_PER_PAGE + (off))

 * value does not cause lots of bitmaps to be allocated, but

 * the scheme scales to up to 4 million PIDs, runtime.

 */

struct pidmap {

	atomic_t nr_free;

	void *page;

};

static struct pidmap pidmap_array[PIDMAP_ENTRIES] =

	 { [ 0 ... PIDMAP_ENTRIES-1 ] = { ATOMIC_INIT(BITS_PER_PAGE), NULL } };