diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2012-11-12 22:16:12 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2013-02-14 15:04:33 +0100 |
| commit | a5d533ee07690b9f904ca7b3732eed3d1134d4bc (patch) | |
| tree | 90a300fd004eb15b573a87604c3e1414df3b06be /arch/arm/include | |
| parent | 88b62b915b0b7e25870eb0604ed9a92ba4bfc9f7 (diff) | |
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 <arnd@arndb.de>
Cc: Russell King <linux@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/dma.h | 2 | ||||
| -rw-r--r-- | arch/arm/include/asm/memory.h | 2 |
2 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h index 5694a0d6576..58b8c6a0ab1 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 73cf03aa981..b11105c8599 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. |