diff options
Diffstat (limited to 'arch/x86/include/asm/dma.h')
| -rw-r--r-- | arch/x86/include/asm/dma.h | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/arch/x86/include/asm/dma.h b/arch/x86/include/asm/dma.h index fe884e18fa6e..8ae6e0e11b8b 100644 --- a/arch/x86/include/asm/dma.h +++ b/arch/x86/include/asm/dma.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * linux/include/asm/dma.h: Defines for using and allocating dma channels. * Written by Hennus Bergman, 1992. @@ -73,7 +74,7 @@ #define MAX_DMA_PFN ((16UL * 1024 * 1024) >> PAGE_SHIFT) /* 4GB broken PCI/AGP hardware bus master zone */ -#define MAX_DMA32_PFN ((4UL * 1024 * 1024 * 1024) >> PAGE_SHIFT) +#define MAX_DMA32_PFN (1UL << (32 - PAGE_SHIFT)) #ifdef CONFIG_X86_32 /* The maximum address that we can perform a DMA transfer to on this platform */ @@ -306,12 +307,4 @@ extern int request_dma(unsigned int dmanr, const char *device_id); extern void free_dma(unsigned int dmanr); #endif -/* From PCI */ - -#ifdef CONFIG_PCI -extern int isa_dma_bridge_buggy; -#else -#define isa_dma_bridge_buggy (0) -#endif - #endif /* _ASM_X86_DMA_H */ |