kernel_optimize_test/fs/proc/mmu.c
Alexey Dobriyan 87400c0475 fs/proc/mmu.c: headers butchery
fs/proc/mmu.c consists of only one function which uses only:
1) struct vmalloc_info *
2) struct vm_struct *
3) struct vmalloc_info
4) vmlist
5) VMALLOC_TOTAL, VMALLOC_START, VMALLOC_END
6) read_lock, read_unlock
7) vmlist_lock
8) struct vm_struct

This gives us linux/spinlock.h, asm/pgtable.h, "internal.h", linux/vmalloc.h.
asm/pgtable.h uses PKMAP_BASE on i386, for which asm/highmem.h is needed.
But, linux/highmem.h is actually used to make it compile everywhere.
I'll deal later with this particular i386 surprise.

Cross-compile tested on many archs and configs.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:48 -07:00

61 lines
1.4 KiB
C

/* mmu.c: mmu memory info files
*
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/spinlock.h>
#include <linux/vmalloc.h>
#include <linux/highmem.h>
#include <asm/pgtable.h>
#include "internal.h"
void get_vmalloc_info(struct vmalloc_info *vmi)
{
struct vm_struct *vma;
unsigned long free_area_size;
unsigned long prev_end;
vmi->used = 0;
if (!vmlist) {
vmi->largest_chunk = VMALLOC_TOTAL;
}
else {
vmi->largest_chunk = 0;
prev_end = VMALLOC_START;
read_lock(&vmlist_lock);
for (vma = vmlist; vma; vma = vma->next) {
unsigned long addr = (unsigned long) vma->addr;
/*
* Some archs keep another range for modules in vmlist
*/
if (addr < VMALLOC_START)
continue;
if (addr >= VMALLOC_END)
break;
vmi->used += vma->size;
free_area_size = addr - prev_end;
if (vmi->largest_chunk < free_area_size)
vmi->largest_chunk = free_area_size;
prev_end = vma->size + addr;
}
if (VMALLOC_END - prev_end > vmi->largest_chunk)
vmi->largest_chunk = VMALLOC_END - prev_end;
read_unlock(&vmlist_lock);
}
}