Commit 333c9624 authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[ARM] Move ISA DMA bus_to_virt() out of set_dma_addr() 



Allow the compiler to optimise the bus_to_virt(virt_to_bus())
transformation in the ARM ISA DMA interface.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 109a9378

arch/arm/kernel/dma.c

+4 −4
Original line number Diff line number Diff line
@@ -131,7 +131,7 @@ void set_dma_sg (dmach_t channel, struct scatterlist *sg, int nr_sg) 
 *

 * Copy address to the structure, and set the invalid bit

 */

void set_dma_addr (dmach_t channel, unsigned long physaddr)

void __set_dma_addr (dmach_t channel, void *addr)

{

	dma_t *dma = dma_chan + channel;
@@ -141,7 +141,7 @@ void set_dma_addr (dmach_t channel, unsigned long physaddr) 


	dma->sg = &dma->buf;

	dma->sgcount = 1;

	dma->buf.__address = bus_to_virt(physaddr);

	dma->buf.__address = addr;

	dma->using_sg = 0;

	dma->invalid = 1;

}
@@ -278,7 +278,7 @@ GLOBAL_ALIAS(get_dma_list, get_dma_residue); 
GLOBAL_ALIAS(set_dma_mode, get_dma_residue);

GLOBAL_ALIAS(set_dma_page, get_dma_residue);

GLOBAL_ALIAS(set_dma_count, get_dma_residue);

GLOBAL_ALIAS(set_dma_addr, get_dma_residue);

GLOBAL_ALIAS(__set_dma_addr, get_dma_residue);

GLOBAL_ALIAS(set_dma_sg, get_dma_residue);

GLOBAL_ALIAS(set_dma_speed, get_dma_residue);

GLOBAL_ALIAS(init_dma, get_dma_residue);
@@ -289,7 +289,7 @@ EXPORT_SYMBOL(request_dma); 
EXPORT_SYMBOL(free_dma);

EXPORT_SYMBOL(enable_dma);

EXPORT_SYMBOL(disable_dma);

EXPORT_SYMBOL(set_dma_addr);

EXPORT_SYMBOL(__set_dma_addr);

EXPORT_SYMBOL(set_dma_count);

EXPORT_SYMBOL(set_dma_mode);

EXPORT_SYMBOL(set_dma_page);

include/asm-arm/dma.h

+3 −1
Original line number Diff line number Diff line
@@ -91,7 +91,9 @@ extern void set_dma_sg(dmach_t channel, struct scatterlist *sg, int nr_sg); 
 * especially since some DMA architectures don't update the

 * DMA address immediately, but defer it to the enable_dma().

 */

extern void set_dma_addr(dmach_t channel, unsigned long physaddr);

extern void __set_dma_addr(dmach_t channel, void *addr);

#define set_dma_addr(channel, addr)				\

	__set_dma_addr(channel, bus_to_virt(addr))



/* Set the DMA byte count for this channel

 *

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