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Commit 7b610eec authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
Browse files

x86: cpa, micro-optimization 



Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 87f7f8fe

arch/x86/mm/pageattr.c

+2 −4
Original line number Diff line number Diff line
@@ -237,6 +237,7 @@ static void __set_pmd_pte(pte_t *kpte, unsigned long address, pte_t pte) 
	if (!SHARED_KERNEL_PMD) {

		struct page *page;



		address = __pa(address);

		list_for_each_entry(page, &pgd_list, lru) {

			pgd_t *pgd;

			pud_t *pud;
@@ -351,7 +352,7 @@ try_preserve_large_page(pte_t *kpte, unsigned long address, 


static int split_large_page(pte_t *kpte, unsigned long address)

{

	unsigned long flags, addr, pfn, pfninc = 1;

	unsigned long flags, pfn, pfninc = 1;

	gfp_t gfp_flags = GFP_KERNEL;

	unsigned int i, level;

	pte_t *pbase, *tmp;
@@ -374,8 +375,6 @@ static int split_large_page(pte_t *kpte, unsigned long address) 
	if (tmp != kpte)

		goto out_unlock;



	address = __pa(address);

	addr = address & PMD_PAGE_MASK;

	pbase = (pte_t *)page_address(base);

#ifdef CONFIG_X86_32

	paravirt_alloc_pt(&init_mm, page_to_pfn(base));
@@ -386,7 +385,6 @@ static int split_large_page(pte_t *kpte, unsigned long address) 
	if (level == PG_LEVEL_1G) {

		pfninc = PMD_PAGE_SIZE >> PAGE_SHIFT;

		pgprot_val(ref_prot) |= _PAGE_PSE;

		addr &= PUD_PAGE_MASK;

	}

#endif