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-rw-r--r--include/linux/blkdev.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b3a58adc4352..c5065e3d2ca9 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -535,8 +535,13 @@ extern unsigned long blk_max_low_pfn, blk_max_pfn;
535 * BLK_BOUNCE_ANY : don't bounce anything 535 * BLK_BOUNCE_ANY : don't bounce anything
536 * BLK_BOUNCE_ISA : bounce pages above ISA DMA boundary 536 * BLK_BOUNCE_ISA : bounce pages above ISA DMA boundary
537 */ 537 */
538
539#if BITS_PER_LONG == 32
538#define BLK_BOUNCE_HIGH ((u64)blk_max_low_pfn << PAGE_SHIFT) 540#define BLK_BOUNCE_HIGH ((u64)blk_max_low_pfn << PAGE_SHIFT)
539#define BLK_BOUNCE_ANY ((u64)blk_max_pfn << PAGE_SHIFT) 541#else
542#define BLK_BOUNCE_HIGH -1ULL
543#endif
544#define BLK_BOUNCE_ANY (-1ULL)
540#define BLK_BOUNCE_ISA (ISA_DMA_THRESHOLD) 545#define BLK_BOUNCE_ISA (ISA_DMA_THRESHOLD)
541 546
542/* 547/*