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| author | Miles Chen | 2019-05-28 18:08:20 +0200 |
|---|---|---|
| committer | Catalin Marinas | 2019-06-04 14:58:28 +0200 |
| commit | 0c1f14ed12262f45a3af1d588e4d7bd12438b8f5 (patch) | |
| tree | ddb2293052b8f4a2e3246d5415baf86f7d51f2dc /arch/arm64/mm | |
| parent | arm64/mm: Simplify protection flag creation for kernel huge mappings (diff) | |
| download | kernel-qcow2-linux-0c1f14ed12262f45a3af1d588e4d7bd12438b8f5.tar.gz kernel-qcow2-linux-0c1f14ed12262f45a3af1d588e4d7bd12438b8f5.tar.xz kernel-qcow2-linux-0c1f14ed12262f45a3af1d588e4d7bd12438b8f5.zip | |
arm64: mm: make CONFIG_ZONE_DMA32 configurable
This change makes CONFIG_ZONE_DMA32 defuly y and allows users
to overwrite it only when CONFIG_EXPERT=y.
For the SoCs that do not need CONFIG_ZONE_DMA32, this is the
first step to manage all available memory by a single
zone(normal zone) to reduce the overhead of multiple zones.
The change also fixes a build error when CONFIG_NUMA=y and
CONFIG_ZONE_DMA32=n.
arch/arm64/mm/init.c:195:17: error: use of undeclared identifier 'ZONE_DMA32'
max_zone_pfns[ZONE_DMA32] = PFN_DOWN(max_zone_dma_phys());
Change since v1:
1. only expose CONFIG_ZONE_DMA32 when CONFIG_EXPERT=y
2. remove redundant IS_ENABLED(CONFIG_ZONE_DMA32)
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Miles Chen <miles.chen@mediatek.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/mm')
| -rw-r--r-- | arch/arm64/mm/init.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index d2adffb81b5d..f643bd45ff69 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -191,8 +191,9 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max) { unsigned long max_zone_pfns[MAX_NR_ZONES] = {0}; - if (IS_ENABLED(CONFIG_ZONE_DMA32)) - max_zone_pfns[ZONE_DMA32] = PFN_DOWN(max_zone_dma_phys()); +#ifdef CONFIG_ZONE_DMA32 + max_zone_pfns[ZONE_DMA32] = PFN_DOWN(max_zone_dma_phys()); +#endif max_zone_pfns[ZONE_NORMAL] = max; free_area_init_nodes(max_zone_pfns); |