diff options
Diffstat (limited to 'arch/powerpc/mm/pgtable_32.c')
| -rw-r--r-- | arch/powerpc/mm/pgtable_32.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index 833139620431..03b1a3b0fbd5 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -72,13 +72,25 @@ extern unsigned long p_mapped_by_tlbcam(phys_addr_t pa); #define PGDIR_ORDER (32 + PGD_T_LOG2 - PGDIR_SHIFT) +#ifndef CONFIG_PPC_4K_PAGES +static struct kmem_cache *pgtable_cache; + +void pgtable_cache_init(void) +{ + pgtable_cache = kmem_cache_create("PGDIR cache", 1 << PGDIR_ORDER, + 1 << PGDIR_ORDER, 0, NULL); + if (pgtable_cache == NULL) + panic("Couldn't allocate pgtable caches"); +} +#endif + pgd_t *pgd_alloc(struct mm_struct *mm) { pgd_t *ret; /* pgdir take page or two with 4K pages and a page fraction otherwise */ #ifndef CONFIG_PPC_4K_PAGES - ret = kzalloc(1 << PGDIR_ORDER, GFP_KERNEL); + ret = kmem_cache_alloc(pgtable_cache, GFP_KERNEL | __GFP_ZERO); #else ret = (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, PGDIR_ORDER - PAGE_SHIFT); @@ -89,7 +101,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm) void pgd_free(struct mm_struct *mm, pgd_t *pgd) { #ifndef CONFIG_PPC_4K_PAGES - kfree((void *)pgd); + kmem_cache_free(pgtable_cache, (void *)pgd); #else free_pages((unsigned long)pgd, PGDIR_ORDER - PAGE_SHIFT); #endif |