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powerpc/32: drop unused ISA_DMA_THRESHOLD

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The ISA_DMA_THRESHOLD variable is set by several platforms but never
referenced.
Remove it.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191125092033.20014-1-rppt@kernel.org
This commit is contained in:
Mike Rapoport 2019-11-25 11:20:33 +02:00 committed by Michael Ellerman
parent 32377bd2cb
commit b77afad84e
7 changed files with 1 additions and 10 deletions
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3
arch/powerpc/include/asm/dma.h
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@ -151,10 +151,9 @@
#define DMA2_EXT_REG 0x4D6
#ifndef __powerpc64__
/* in arch/ppc/kernel/setup.c -- Cort */
/* in arch/powerpc/kernel/setup_32.c -- Cort */
extern unsigned int DMA_MODE_WRITE;
extern unsigned int DMA_MODE_READ;
extern unsigned long ISA_DMA_THRESHOLD;
#else
#define DMA_MODE_READ 0x44 /* I/O to memory, no autoinit, increment, single mode */
#define DMA_MODE_WRITE 0x48 /* memory to I/O, no autoinit, increment, single mode */

1
arch/powerpc/kernel/setup_32.c
View File

@ -58,7 +58,6 @@ EXPORT_SYMBOL_GPL(boot_cpuid_phys);
int smp_hw_index[NR_CPUS];
EXPORT_SYMBOL(smp_hw_index);
unsigned long ISA_DMA_THRESHOLD;
unsigned int DMA_MODE_READ;
unsigned int DMA_MODE_WRITE;

3
arch/powerpc/platforms/44x/warp.c
View File

@ -43,9 +43,6 @@ static int __init warp_probe(void)
if (!of_machine_is_compatible("pika,warp"))
return 0;
/* For arch_dma_alloc */
ISA_DMA_THRESHOLD = ~0L;
return 1;
}

1
arch/powerpc/platforms/52xx/efika.c
View File

@ -205,7 +205,6 @@ static int __init efika_probe(void)
if (strcmp(model, "EFIKA5K2"))
return 0;
ISA_DMA_THRESHOLD = ~0L;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;

1
arch/powerpc/platforms/amigaone/setup.c
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@ -146,7 +146,6 @@ static int __init amigaone_probe(void)
*/
cur_cpu_spec->cpu_features &= ~CPU_FTR_NEED_COHERENT;
ISA_DMA_THRESHOLD = 0x00ffffff;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;

1
arch/powerpc/platforms/chrp/setup.c
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@ -569,7 +569,6 @@ static int __init chrp_probe(void)
if (strcmp(dtype, "chrp"))
return 0;
ISA_DMA_THRESHOLD = ~0L;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;

1
arch/powerpc/platforms/powermac/setup.c
View File

@ -586,7 +586,6 @@ static int __init pmac_probe(void)
#ifdef CONFIG_PPC32
/* isa_io_base gets set in pmac_pci_init */
ISA_DMA_THRESHOLD = ~0L;
DMA_MODE_READ = 1;
DMA_MODE_WRITE = 2;
#endif /* CONFIG_PPC32 */