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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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87400c0475
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>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/* mmu.c: mmu memory info files
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*
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* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/spinlock.h>
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#include <linux/vmalloc.h>
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#include <linux/highmem.h>
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#include <asm/pgtable.h>
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#include "internal.h"
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void get_vmalloc_info(struct vmalloc_info *vmi)
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{
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struct vm_struct *vma;
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unsigned long free_area_size;
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unsigned long prev_end;
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vmi->used = 0;
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if (!vmlist) {
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vmi->largest_chunk = VMALLOC_TOTAL;
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}
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else {
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vmi->largest_chunk = 0;
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prev_end = VMALLOC_START;
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read_lock(&vmlist_lock);
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for (vma = vmlist; vma; vma = vma->next) {
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unsigned long addr = (unsigned long) vma->addr;
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/*
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* Some archs keep another range for modules in vmlist
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*/
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if (addr < VMALLOC_START)
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continue;
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if (addr >= VMALLOC_END)
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break;
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vmi->used += vma->size;
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free_area_size = addr - prev_end;
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if (vmi->largest_chunk < free_area_size)
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vmi->largest_chunk = free_area_size;
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prev_end = vma->size + addr;
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}
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if (VMALLOC_END - prev_end > vmi->largest_chunk)
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vmi->largest_chunk = VMALLOC_END - prev_end;
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read_unlock(&vmlist_lock);
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}
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}
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