powerpc/32: drop unused ISA_DMA_THRESHOLD

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

diff --git a/arch/powerpc/include/asm/dma.h b/arch/powerpc/include/asm/dma.h
index 1b4f025..6161a95 100644 (file)
--- a/arch/powerpc/include/asm/dma.h
+++ b/arch/powerpc/include/asm/dma.h
@@ -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 */

diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 5b49b26..305ca89 100644 (file)
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -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;
 

diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index 6620b64..665f18e 100644 (file)
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -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;
 }
 

diff --git a/arch/powerpc/platforms/52xx/efika.c b/arch/powerpc/platforms/52xx/efika.c
index 6153886..4514a6f 100644 (file)
--- a/arch/powerpc/platforms/52xx/efika.c
+++ b/arch/powerpc/platforms/52xx/efika.c
@@ -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;
 

diff --git a/arch/powerpc/platforms/amigaone/setup.c b/arch/powerpc/platforms/amigaone/setup.c
index ea5e45e..f5d0bf9 100644 (file)
--- a/arch/powerpc/platforms/amigaone/setup.c
+++ b/arch/powerpc/platforms/amigaone/setup.c
@@ -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;
 

diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
index 8328cd5..65a7e01 100644 (file)
--- a/arch/powerpc/platforms/chrp/setup.c
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -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;
 

diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index c6d5333..95fb4fe 100644 (file)
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -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 */