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Commit 155bb144 authored by Russell King's avatar Russell King
Browse files

[PATCH] ARM: Add inline functions to find the pmd from virtual address 



Add pmd_off() and pmd_off_k() to obtain the pmd pointer for a
virtual address, and use them throughout the mm initialisation.

Signed-off-by: default avatarRussell King <rmk@arm.linux.org.uk>
parent 88d7bd8c

arch/arm/mm/mm-armv.c

+15 −8
Original line number Diff line number Diff line
@@ -142,6 +142,16 @@ __setup("noalign", noalign_setup); 


#define FIRST_KERNEL_PGD_NR	(FIRST_USER_PGD_NR + USER_PTRS_PER_PGD)



static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)

{

	return pmd_offset(pgd, virt);

}



static inline pmd_t *pmd_off_k(unsigned long virt)

{

	return pmd_off(pgd_offset_k(virt), virt);

}



/*

 * need to get a 16k page for level 1

 */
@@ -220,7 +230,7 @@ void free_pgd_slow(pgd_t *pgd) 
		return;



	/* pgd is always present and good */

	pmd = (pmd_t *)pgd;

	pmd = pmd_off(pgd, 0);

	if (pmd_none(*pmd))

		goto free;

	if (pmd_bad(*pmd)) {
@@ -246,9 +256,8 @@ free: 
static inline void

alloc_init_section(unsigned long virt, unsigned long phys, int prot)

{

	pmd_t *pmdp;

	pmd_t *pmdp = pmd_off_k(virt);



	pmdp = pmd_offset(pgd_offset_k(virt), virt);

	if (virt & (1 << 20))

		pmdp++;
@@ -283,11 +292,9 @@ alloc_init_supersection(unsigned long virt, unsigned long phys, int prot) 
static inline void

alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pgprot_t prot)

{

	pmd_t *pmdp;

	pmd_t *pmdp = pmd_off_k(virt);

	pte_t *ptep;



	pmdp = pmd_offset(pgd_offset_k(virt), virt);



	if (pmd_none(*pmdp)) {

		unsigned long pmdval;

		ptep = alloc_bootmem_low_pages(2 * PTRS_PER_PTE *
@@ -310,7 +317,7 @@ alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pg 
 */

static inline void clear_mapping(unsigned long virt)

{

	pmd_clear(pmd_offset(pgd_offset_k(virt), virt));

	pmd_clear(pmd_off_k(virt));

}



struct mem_types {
@@ -578,7 +585,7 @@ void setup_mm_for_reboot(char mode) 
			 PMD_TYPE_SECT;

		if (cpu_arch <= CPU_ARCH_ARMv5)

			pmdval |= PMD_BIT4;

		pmd = pmd_offset(pgd + i, i << PGDIR_SHIFT);

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

		pmd[0] = __pmd(pmdval);

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

		flush_pmd_entry(pmd);