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[PATCH] x86_64: pageattr remove __put_page

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Remove page_count and __put_page from x86-64 pageattr

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin 2006-03-22 00:08:33 -08:00 committed by Linus Torvalds
parent 20aaffd6a6
commit 4fa4f53bf9
1 changed files with 14 additions and 9 deletions
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23
arch/x86_64/mm/pageattr.c
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@ -45,6 +45,13 @@ static struct page *split_large_page(unsigned long address, pgprot_t prot,
pte_t *pbase;
if (!base)
return NULL;
/*
* page_private is used to track the number of entries in
* the page table page have non standard attributes.
*/
SetPagePrivate(base);
page_private(base) = 0;
address = __pa(address);
addr = address & LARGE_PAGE_MASK;
pbase = (pte_t *)page_address(base);
@ -124,8 +131,8 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot,
set_pte(kpte, pfn_pte(pfn, prot));
} else {
/*
* split_large_page will take the reference for this change_page_attr
* on the split page.
* split_large_page will take the reference for this
* change_page_attr on the split page.
*/
struct page *split;
@ -137,23 +144,20 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot,
set_pte(kpte,mk_pte(split, ref_prot2));
kpte_page = split;
}
get_page(kpte_page);
page_private(kpte_page)++;
} else if ((kpte_flags & _PAGE_PSE) == 0) {
set_pte(kpte, pfn_pte(pfn, ref_prot));
__put_page(kpte_page);
BUG_ON(page_private(kpte_page) == 0);
page_private(kpte_page)--;
} else
BUG();
/* on x86-64 the direct mapping set at boot is not using 4k pages */
BUG_ON(PageReserved(kpte_page));
switch (page_count(kpte_page)) {
case 1:
if (page_private(kpte_page) == 0) {
save_page(kpte_page);
revert_page(address, ref_prot);
break;
case 0:
BUG(); /* memleak and failed 2M page regeneration */
}
return 0;
}
@ -216,6 +220,7 @@ void global_flush_tlb(void)
while (dpage) {
struct page *tmp = dpage;
dpage = (struct page *)dpage->lru.next;
ClearPagePrivate(tmp);
__free_page(tmp);
}
}