diff options
Diffstat (limited to 'include/asm-mips/highmem.h')
| -rw-r--r-- | include/asm-mips/highmem.h | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/include/asm-mips/highmem.h b/include/asm-mips/highmem.h index f8c8182f7f2e..4d6bd5c31c7b 100644 --- a/include/asm-mips/highmem.h +++ b/include/asm-mips/highmem.h @@ -48,46 +48,6 @@ extern pte_t *pkmap_page_table; extern void * kmap_high(struct page *page); extern void kunmap_high(struct page *page); -/* - * CONFIG_LIMITED_DMA is for systems with DMA limitations such as Momentum's - * Jaguar ATX. This option exploits the highmem code in the kernel so is - * always enabled together with CONFIG_HIGHMEM but at this time doesn't - * actually add highmem functionality. - */ - -#ifdef CONFIG_LIMITED_DMA - -/* - * These are the default functions for the no-highmem case from - * <linux/highmem.h> - */ -static inline void *kmap(struct page *page) -{ - might_sleep(); - return page_address(page); -} - -#define kunmap(page) do { (void) (page); } while (0) - -static inline void *kmap_atomic(struct page *page, enum km_type type) -{ - pagefault_disable(); - return page_address(page); -} - -static inline void kunmap_atomic(void *kvaddr, enum km_type type) -{ - pagefault_enable(); -} - -#define kmap_atomic_pfn(pfn, idx) kmap_atomic(pfn_to_page(pfn), (idx)) - -#define kmap_atomic_to_page(ptr) virt_to_page(ptr) - -#define flush_cache_kmaps() do { } while (0) - -#else /* LIMITED_DMA */ - extern void *__kmap(struct page *page); extern void __kunmap(struct page *page); extern void *__kmap_atomic(struct page *page, enum km_type type); @@ -103,8 +63,6 @@ extern struct page *__kmap_atomic_to_page(void *ptr); #define flush_cache_kmaps() flush_cache_all() -#endif /* LIMITED_DMA */ - #endif /* __KERNEL__ */ #endif /* _ASM_HIGHMEM_H */ |
