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Commit 103461a8 authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[ARM] Simplify setup_mm_for_reboot() 



No point checking what CPU architecture level we have each time
within the loop, so precompute the base PMD flags outside the
loop.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 08f4ffb3

arch/arm/mm/mm-armv.c

+9 −9
Original line number Diff line number Diff line
@@ -577,23 +577,23 @@ static void __init create_mapping(struct map_desc *md) 
 */

void setup_mm_for_reboot(char mode)

{

	unsigned long pmdval;

	unsigned long base_pmdval;

	pgd_t *pgd;

	pmd_t *pmd;

	int i;

	int cpu_arch = cpu_architecture();



	if (current->mm && current->mm->pgd)

		pgd = current->mm->pgd;

	else

		pgd = init_mm.pgd;



	for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++) {

		pmdval = (i << PGDIR_SHIFT) |

			 PMD_SECT_AP_WRITE | PMD_SECT_AP_READ |

			 PMD_TYPE_SECT;

		if (cpu_arch <= CPU_ARCH_ARMv5TEJ)

			pmdval |= PMD_BIT4;

	base_pmdval = PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT;

	if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ)

		base_pmdval |= PMD_BIT4;



	for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++, pgd++) {

		unsigned long pmdval = (i << PGDIR_SHIFT) | base_pmdval;

		pmd_t *pmd;



		pmd = pmd_off(pgd, i << PGDIR_SHIFT);

		pmd[0] = __pmd(pmdval);

		pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1)));