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[S390] Cleanup in page table related code.

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Changed and simplified some page table related #defines and code.

Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Gerald Schaefer
2006-09-20 15:59:37 +02:00
committed by Martin Schwidefsky
parent 31b5808829
commit 9282ed9297
3 changed files with 104 additions and 119 deletions
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65
include/asm-s390/pgalloc.h
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@@ -21,6 +21,16 @@
extern void diag10(unsigned long addr);
/*
* Page allocation orders.
*/
#ifndef __s390x__
# define PGD_ALLOC_ORDER 1
#else /* __s390x__ */
# define PMD_ALLOC_ORDER 2
# define PGD_ALLOC_ORDER 2
#endif /* __s390x__ */
/*
* Allocate and free page tables. The xxx_kernel() versions are
* used to allocate a kernel page table - this turns on ASN bits
@@ -29,30 +39,23 @@ extern void diag10(unsigned long addr);
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *pgd;
pgd_t *pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ALLOC_ORDER);
int i;
if (!pgd)
return NULL;
for (i = 0; i < PTRS_PER_PGD; i++)
#ifndef __s390x__
pgd = (pgd_t *) __get_free_pages(GFP_KERNEL,1);
if (pgd != NULL)
for (i = 0; i < USER_PTRS_PER_PGD; i++)
pmd_clear(pmd_offset(pgd + i, i*PGDIR_SIZE));
#else /* __s390x__ */
pgd = (pgd_t *) __get_free_pages(GFP_KERNEL,2);
if (pgd != NULL)
for (i = 0; i < PTRS_PER_PGD; i++)
pgd_clear(pgd + i);
#endif /* __s390x__ */
pmd_clear(pmd_offset(pgd + i, i*PGDIR_SIZE));
#else
pgd_clear(pgd + i);
#endif
return pgd;
}
static inline void pgd_free(pgd_t *pgd)
{
#ifndef __s390x__
free_pages((unsigned long) pgd, 1);
#else /* __s390x__ */
free_pages((unsigned long) pgd, 2);
#endif /* __s390x__ */
free_pages((unsigned long) pgd, PGD_ALLOC_ORDER);
}
#ifndef __s390x__
@@ -68,20 +71,19 @@ static inline void pgd_free(pgd_t *pgd)
#else /* __s390x__ */
static inline pmd_t * pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
{
pmd_t *pmd;
int i;
pmd_t *pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ALLOC_ORDER);
int i;
pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, 2);
if (pmd != NULL) {
for (i=0; i < PTRS_PER_PMD; i++)
pmd_clear(pmd+i);
}
if (!pmd)
return NULL;
for (i=0; i < PTRS_PER_PMD; i++)
pmd_clear(pmd + i);
return pmd;
}
static inline void pmd_free (pmd_t *pmd)
{
free_pages((unsigned long) pmd, 2);
free_pages((unsigned long) pmd, PMD_ALLOC_ORDER);
}
#define __pmd_free_tlb(tlb,pmd) \
@@ -123,15 +125,14 @@ pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
static inline pte_t *
pte_alloc_one_kernel(struct mm_struct *mm, unsigned long vmaddr)
{
pte_t *pte;
int i;
pte_t *pte = (pte_t *) __get_free_page(GFP_KERNEL|__GFP_REPEAT);
int i;
pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
if (pte != NULL) {
for (i=0; i < PTRS_PER_PTE; i++) {
pte_clear(mm, vmaddr, pte+i);
vmaddr += PAGE_SIZE;
}
if (!pte)
return NULL;
for (i=0; i < PTRS_PER_PTE; i++) {
pte_clear(mm, vmaddr, pte + i);
vmaddr += PAGE_SIZE;
}
return pte;
}