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Commit 22b6f3b0 authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Will Deacon
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arm64: mm: avoid virt_to_page() translation for the zero page 



The zero page is statically allocated, so grab its struct page pointer
without using virt_to_page(), which will be restricted to the linear
mapping later.

Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent d386825c

arch/arm64/include/asm/pgtable.h

+1 −1
Original line number Diff line number Diff line
@@ -57,7 +57,7 @@ extern void __pgd_error(const char *file, int line, unsigned long val); 
 * for zero-mapped memory areas etc..

 */

extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];

#define ZERO_PAGE(vaddr)	virt_to_page(empty_zero_page)

#define ZERO_PAGE(vaddr)	pfn_to_page(PHYS_PFN(__pa(empty_zero_page)))



#define pte_ERROR(pte)		__pte_error(__FILE__, __LINE__, pte_val(pte))