linux-stable/include/asm-avr32/pgalloc.h
Haavard Skinnemoen e7f3bac95e [AVR32] Simplify pte_alloc_one{,_kernel}
There's really no need to retry an allocation with __GFP_REPEAT set.
Also, use get_zeroed_page() and __GFP_ZERO to eliminate the extra call
to clear_page() afterwards.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-08-15 16:36:56 +02:00

72 lines
1.5 KiB
C

/*
* Copyright (C) 2004-2006 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_AVR32_PGALLOC_H
#define __ASM_AVR32_PGALLOC_H
#include <asm/processor.h>
#include <linux/threads.h>
#include <linux/slab.h>
#include <linux/mm.h>
#define pmd_populate_kernel(mm, pmd, pte) \
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
struct page *pte)
{
set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
}
/*
* Allocate and free page tables
*/
static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
{
return kcalloc(USER_PTRS_PER_PGD, sizeof(pgd_t), GFP_KERNEL);
}
static inline void pgd_free(pgd_t *pgd)
{
kfree(pgd);
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
pte_t *pte;
pte = (pte_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
return pte;
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
struct page *pte;
pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
return pte;
}
static inline void pte_free_kernel(pte_t *pte)
{
free_page((unsigned long)pte);
}
static inline void pte_free(struct page *pte)
{
__free_page(pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define check_pgt_cache() do { } while(0)
#endif /* __ASM_AVR32_PGALLOC_H */