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| author | Miles Chen <miles.chen@mediatek.com> | 2019-05-29 00:08:20 +0800 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2019-06-04 13:58:28 +0100 |
| commit | 0c1f14ed12262f45a3af1d588e4d7bd12438b8f5 (patch) | |
| tree | ddb2293052b8f4a2e3246d5415baf86f7d51f2dc /arch/arm64 | |
| parent | f7f0097af67c3c119f6dc7046234630e77f4877e (diff) | |
| download | linux-0c1f14ed12262f45a3af1d588e4d7bd12438b8f5.tar.gz linux-0c1f14ed12262f45a3af1d588e4d7bd12438b8f5.tar.bz2 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')
| -rw-r--r-- | arch/arm64/Kconfig | 3 | ||||
| -rw-r--r-- | arch/arm64/mm/init.c | 5 |
2 files changed, 5 insertions, 3 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 697ea0510729..cf5f1dafcf74 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -260,7 +260,8 @@ config GENERIC_CALIBRATE_DELAY def_bool y config ZONE_DMA32 - def_bool y + bool "Support DMA32 zone" if EXPERT + default y config HAVE_GENERIC_GUP def_bool y 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); |