From a5d533ee07690b9f904ca7b3732eed3d1134d4bc Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 12 Nov 2012 22:16:12 +0000 Subject: ARM: disable virt_to_bus/virt_to_bus almost everywhere We are getting a number of warnings about the use of the deprecated bus_to_virt function in drivers using the ARM ISA DMA API: drivers/parport/parport_pc.c: In function 'parport_pc_fifo_write_block_dma': drivers/parport/parport_pc.c:622:3: warning: 'bus_to_virt' is deprecated (declared at arch/arm/include/asm/memory.h:253) [-Wdeprecated-declarations] This is only because that function gets used by the inline set_dma_addr() helper. We know that any driver for the ISA DMA API is correctly using the DMA addresses, so we can change this to use the __bus_to_virt() function instead, which does not warn. After this, there are no remaining drivers that are used on any defconfigs on ARM using virt_to_bus or bus_to_virt, with the exception of the OSS sound driver. That driver is only used on RiscPC, NetWinder and Shark, so we can set ARCH_NO_VIRT_TO_BUS on all other platforms and hide the deprecated functions, which is far more effective than marking them as deprecated, in order to avoid any new users of that code. Signed-off-by: Arnd Bergmann Cc: Russell King --- arch/arm/Kconfig | 4 ++++ arch/arm/configs/shark_defconfig | 1 - arch/arm/include/asm/dma.h | 2 +- arch/arm/include/asm/memory.h | 2 ++ 4 files changed, 7 insertions(+), 2 deletions(-) (limited to 'arch') diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 67874b82a4ed..91d4aeaa772b 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1450,6 +1450,10 @@ config ISA_DMA bool select ISA_DMA_API +config ARCH_NO_VIRT_TO_BUS + def_bool y + depends on !ARCH_RPC && !ARCH_NETWINDER && !ARCH_SHARK + # Select ISA DMA interface config ISA_DMA_API bool diff --git a/arch/arm/configs/shark_defconfig b/arch/arm/configs/shark_defconfig index caa07db90cf5..e319b2c56f11 100644 --- a/arch/arm/configs/shark_defconfig +++ b/arch/arm/configs/shark_defconfig @@ -73,7 +73,6 @@ CONFIG_PARTITION_ADVANCED=y CONFIG_NLS_CODEPAGE_437=m CONFIG_NLS_CODEPAGE_850=m CONFIG_NLS_ISO8859_1=m -# CONFIG_ENABLE_WARN_DEPRECATED is not set # CONFIG_ENABLE_MUST_CHECK is not set CONFIG_DEBUG_KERNEL=y # CONFIG_SCHED_DEBUG is not set diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h index 5694a0d6576b..58b8c6a0ab1f 100644 --- a/arch/arm/include/asm/dma.h +++ b/arch/arm/include/asm/dma.h @@ -105,7 +105,7 @@ extern void set_dma_sg(unsigned int chan, struct scatterlist *sg, int nr_sg); */ extern void __set_dma_addr(unsigned int chan, void *addr); #define set_dma_addr(chan, addr) \ - __set_dma_addr(chan, bus_to_virt(addr)) + __set_dma_addr(chan, (void *)__bus_to_virt(addr)) /* Set the DMA byte count for this channel * diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index 73cf03aa981e..b11105c8599a 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -245,6 +245,7 @@ static inline void *phys_to_virt(phys_addr_t x) #define __bus_to_pfn(x) __phys_to_pfn(x) #endif +#ifdef CONFIG_VIRT_TO_BUS static inline __deprecated unsigned long virt_to_bus(void *x) { return __virt_to_bus((unsigned long)x); @@ -254,6 +255,7 @@ static inline __deprecated void *bus_to_virt(unsigned long x) { return (void *)__bus_to_virt(x); } +#endif /* * Conversion between a struct page and a physical address. -- cgit v1.2.3