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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 */