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authorNicolas Saenz Julienne <nsaenzjulienne@suse.de>2019-10-14 20:31:03 +0200
committerCatalin Marinas <catalin.marinas@arm.com>2019-11-01 09:41:18 +0000
commit8b5369ea580964dbc982781bfb9fb93459fc5e8d (patch)
tree55f4d7308e5fb1f4c5df396e637ba08bfa2daf46 /arch/s390
parent4686da5140c18c84ca01a8ab994571d832c63398 (diff)
downloadlinux-8b5369ea580964dbc982781bfb9fb93459fc5e8d.tar.bz2
dma/direct: turn ARCH_ZONE_DMA_BITS into a variable
Some architectures, notably ARM, are interested in tweaking this depending on their runtime DMA addressing limitations. Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/page.h2
-rw-r--r--arch/s390/mm/init.c1
2 files changed, 1 insertions, 2 deletions
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
index 823578c6b9e2..a4d38092530a 100644
--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -177,8 +177,6 @@ static inline int devmem_is_allowed(unsigned long pfn)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-#define ARCH_ZONE_DMA_BITS 31
-
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index a124f19f7b3c..f0ce22220565 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -118,6 +118,7 @@ void __init paging_init(void)
sparse_memory_present_with_active_regions(MAX_NUMNODES);
sparse_init();
+ zone_dma_bits = 31;
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS);
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;