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Commit 29b93c68 authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARC: [mm] Zero page optimization 



Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent 2f9e9961

arch/arc/mm/tlb.c

+5 −1
Original line number Diff line number Diff line
@@ -433,9 +433,14 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr_unaligned, 
{

	unsigned long vaddr = vaddr_unaligned & PAGE_MASK;

	unsigned long paddr = pte_val(*ptep) & PAGE_MASK;

	struct page *page = pfn_to_page(pte_pfn(*ptep));



	create_tlb(vma, vaddr, ptep);



	if (page == ZERO_PAGE(0)) {

		return;

	}



	/*

	 * Exec page : Independent of aliasing/page-color considerations,

	 *	       since icache doesn't snoop dcache on ARC, any dirty
@@ -447,7 +452,6 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr_unaligned, 
	 */

	if ((vma->vm_flags & VM_EXEC) ||

	     addr_not_cache_congruent(paddr, vaddr)) {

		struct page *page = pfn_to_page(pte_pfn(*ptep));



		int dirty = test_and_clear_bit(PG_arch_1, &page->flags);

		if (dirty) {