diff options
Diffstat (limited to 'arch/powerpc/mm/init_64.c')
| -rw-r--r-- | arch/powerpc/mm/init_64.c | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index 16ada1eb7e26..a000c3585390 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -80,83 +80,6 @@ EXPORT_SYMBOL_GPL(memstart_addr); phys_addr_t kernstart_addr; EXPORT_SYMBOL_GPL(kernstart_addr); -static void pgd_ctor(void *addr) -{ - memset(addr, 0, PGD_TABLE_SIZE); -} - -static void pud_ctor(void *addr) -{ - memset(addr, 0, PUD_TABLE_SIZE); -} - -static void pmd_ctor(void *addr) -{ - memset(addr, 0, PMD_TABLE_SIZE); -} - -struct kmem_cache *pgtable_cache[MAX_PGTABLE_INDEX_SIZE]; - -/* - * Create a kmem_cache() for pagetables. This is not used for PTE - * pages - they're linked to struct page, come from the normal free - * pages pool and have a different entry size (see real_pte_t) to - * everything else. Caches created by this function are used for all - * the higher level pagetables, and for hugepage pagetables. - */ -void pgtable_cache_add(unsigned shift, void (*ctor)(void *)) -{ - char *name; - unsigned long table_size = sizeof(void *) << shift; - unsigned long align = table_size; - - /* When batching pgtable pointers for RCU freeing, we store - * the index size in the low bits. Table alignment must be - * big enough to fit it. - * - * Likewise, hugeapge pagetable pointers contain a (different) - * shift value in the low bits. All tables must be aligned so - * as to leave enough 0 bits in the address to contain it. */ - unsigned long minalign = max(MAX_PGTABLE_INDEX_SIZE + 1, - HUGEPD_SHIFT_MASK + 1); - struct kmem_cache *new; - - /* It would be nice if this was a BUILD_BUG_ON(), but at the - * moment, gcc doesn't seem to recognize is_power_of_2 as a - * constant expression, so so much for that. */ - BUG_ON(!is_power_of_2(minalign)); - BUG_ON((shift < 1) || (shift > MAX_PGTABLE_INDEX_SIZE)); - - if (PGT_CACHE(shift)) - return; /* Already have a cache of this size */ - - align = max_t(unsigned long, align, minalign); - name = kasprintf(GFP_KERNEL, "pgtable-2^%d", shift); - new = kmem_cache_create(name, table_size, align, 0, ctor); - kfree(name); - pgtable_cache[shift - 1] = new; - pr_debug("Allocated pgtable cache for order %d\n", shift); -} - - -void pgtable_cache_init(void) -{ - pgtable_cache_add(PGD_INDEX_SIZE, pgd_ctor); - pgtable_cache_add(PMD_CACHE_INDEX, pmd_ctor); - /* - * In all current configs, when the PUD index exists it's the - * same size as either the pgd or pmd index except with THP enabled - * on book3s 64 - */ - if (PUD_INDEX_SIZE && !PGT_CACHE(PUD_INDEX_SIZE)) - pgtable_cache_add(PUD_INDEX_SIZE, pud_ctor); - - if (!PGT_CACHE(PGD_INDEX_SIZE) || !PGT_CACHE(PMD_CACHE_INDEX)) - panic("Couldn't allocate pgtable caches"); - if (PUD_INDEX_SIZE && !PGT_CACHE(PUD_INDEX_SIZE)) - panic("Couldn't allocate pud pgtable caches"); -} - #ifdef CONFIG_SPARSEMEM_VMEMMAP /* * Given an address within the vmemmap, determine the pfn of the page that |