[MIPS] Remove LIMITED_DMA support

This code was needed only by Jaguar ATX.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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 */