AcoSail/kernel_optimize_test
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x86: change cpa to pfn based

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change CPA to pfn based.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2008-01-30 13:34:04 +01:00
parent 687c4825b6
commit 8192206df0
1 changed files with 8 additions and 5 deletions
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13
arch/x86/mm/pageattr.c
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@ -3,6 +3,7 @@
* Thanks to Ben LaHaise for precious feedback.
*/
#include <linux/highmem.h>
#include <linux/bootmem.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/slab.h>
@ -144,13 +145,15 @@ static int split_large_page(pte_t *kpte, unsigned long address)
}
static int
__change_page_attr(unsigned long address, struct page *page, pgprot_t prot)
__change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot)
{
struct page *kpte_page;
int level, err = 0;
pte_t *kpte;
BUG_ON(PageHighMem(page));
#ifdef CONFIG_X86_32
BUG_ON(pfn > max_low_pfn);
#endif
repeat:
kpte = lookup_address(address, &level);
@ -164,7 +167,7 @@ __change_page_attr(unsigned long address, struct page *page, pgprot_t prot)
prot = check_exec(prot, address);
if (level == PG_LEVEL_4K) {
set_pte_atomic(kpte, mk_pte(page, canon_pgprot(prot)));
set_pte_atomic(kpte, pfn_pte(pfn, canon_pgprot(prot)));
} else {
err = split_large_page(kpte, address);
if (!err)
@ -203,7 +206,7 @@ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
unsigned long pfn = __pa(address) >> PAGE_SHIFT;
if (!kernel_map || pte_present(pfn_pte(0, prot))) {
err = __change_page_attr(address, pfn_to_page(pfn), prot);
err = __change_page_attr(address, pfn, prot);
if (err)
break;
}
@ -219,7 +222,7 @@ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
addr2 = __START_KERNEL_map + __pa(address);
/* Make sure the kernel mappings stay executable */
prot2 = pte_pgprot(pte_mkexec(pfn_pte(0, prot)));
err = __change_page_attr(addr2, pfn_to_page(pfn), prot2);
err = __change_page_attr(addr2, pfn, prot2);
}
#endif
}