diff options
Diffstat (limited to 'include/asm-generic/pgalloc.h')
| -rw-r--r-- | include/asm-generic/pgalloc.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/asm-generic/pgalloc.h b/include/asm-generic/pgalloc.h index 1bc027891a00..d361574aaadf 100644 --- a/include/asm-generic/pgalloc.h +++ b/include/asm-generic/pgalloc.h @@ -145,6 +145,36 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) #endif /* CONFIG_PGTABLE_LEVELS > 2 */ +#if CONFIG_PGTABLE_LEVELS > 3 + +#ifndef __HAVE_ARCH_PUD_FREE +/** + * pud_alloc_one - allocate a page for PUD-level page table + * @mm: the mm_struct of the current context + * + * Allocates a page using %GFP_PGTABLE_USER for user context and + * %GFP_PGTABLE_KERNEL for kernel context. + * + * Return: pointer to the allocated memory or %NULL on error + */ +static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + gfp_t gfp = GFP_PGTABLE_USER; + + if (mm == &init_mm) + gfp = GFP_PGTABLE_KERNEL; + return (pud_t *)get_zeroed_page(gfp); +} +#endif + +static inline void pud_free(struct mm_struct *mm, pud_t *pud) +{ + BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); + free_page((unsigned long)pud); +} + +#endif /* CONFIG_PGTABLE_LEVELS > 3 */ + #endif /* CONFIG_MMU */ #endif /* __ASM_GENERIC_PGALLOC_H */ |