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https://github.com/torvalds/linux
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0f8053a509
Remove __put_page from outside the core mm/. It is dangerous because it does not handle compound pages nicely, and misses 1->0 transitions. If a user later appears that really needs the extra speed we can reevaluate. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
42 lines
1 KiB
C
42 lines
1 KiB
C
/* internal.h: mm/ internal definitions
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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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#ifndef __MM_INTERNAL_H
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#define __MM_INTERNAL_H
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#include <linux/mm.h>
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static inline void set_page_refs(struct page *page, int order)
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{
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#ifdef CONFIG_MMU
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set_page_count(page, 1);
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#else
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int i;
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/*
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* We need to reference all the pages for this order, otherwise if
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* anyone accesses one of the pages with (get/put) it will be freed.
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* - eg: access_process_vm()
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*/
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for (i = 0; i < (1 << order); i++)
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set_page_count(page + i, 1);
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#endif /* CONFIG_MMU */
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}
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static inline void __put_page(struct page *page)
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{
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atomic_dec(&page->_count);
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}
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extern void fastcall __init __free_pages_bootmem(struct page *page,
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unsigned int order);
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#endif
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