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Date: Wed, 4 Apr 2012 19:39:58 +0200 From: Alessandro Rubini <rubini@...dd.com> To: linux-kernel@...r.kernel.org Cc: Giancarlo Asnaghi <giancarlo.asnaghi@...com>, Alan Cox <alan@...ux.intel.com>, tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, x86@...nel.org, Jesse Barnes <jbarnes@...tuousgeek.org>, Ingo Molnar <mingo@...e.hu> Subject: [PATCH V5 1/3] x86: introduce CONFIG_X86_DEV_DMA_OPS 32-bit x86 systems may need their own DMA operations, so add a new config option, which is turned on for 64-bit systems. This patch has no functional effect but it paves the way for supporting the STA2x11 I/O Hub and possibly other chips. Signed-off-by: Alessandro Rubini <rubini@...dd.com> Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@...com> Cc: Alan Cox <alan@...ux.intel.com> --- arch/x86/Kconfig | 5 +++++ arch/x86/include/asm/device.h | 4 ++-- arch/x86/include/asm/dma-mapping.h | 2 +- 3 files changed, 8 insertions(+), 3 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index b3baf10..a3ce2e7 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -12,6 +12,7 @@ config X86_32 config X86_64 def_bool 64BIT + select X86_DEV_DMA_OPS ### Arch settings config X86 @@ -2249,6 +2250,10 @@ config HAVE_TEXT_POKE_SMP bool select STOP_MACHINE if SMP +config X86_DEV_DMA_OPS + bool + depends on X86_64 + source "net/Kconfig" source "drivers/Kconfig" diff --git a/arch/x86/include/asm/device.h b/arch/x86/include/asm/device.h index 63a2a03..93e1c55 100644 --- a/arch/x86/include/asm/device.h +++ b/arch/x86/include/asm/device.h @@ -5,8 +5,8 @@ struct dev_archdata { #ifdef CONFIG_ACPI void *acpi_handle; #endif -#ifdef CONFIG_X86_64 -struct dma_map_ops *dma_ops; +#ifdef CONFIG_X86_DEV_DMA_OPS + struct dma_map_ops *dma_ops; #endif #if defined(CONFIG_INTEL_IOMMU) || defined(CONFIG_AMD_IOMMU) void *iommu; /* hook for IOMMU specific extension */ diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index 4b4331d..09aa473 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -30,7 +30,7 @@ extern struct dma_map_ops *dma_ops; static inline struct dma_map_ops *get_dma_ops(struct device *dev) { -#ifdef CONFIG_X86_32 +#ifndef CONFIG_X86_DEV_DMA_OPS return dma_ops; #else if (unlikely(!dev) || !dev->archdata.dma_ops) -- 1.7.7.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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