diff options
| author | Ingo Molnar <mingo@kernel.org> | 2014-06-25 07:41:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-06-25 07:41:54 +0200 |
| commit | 98d350cf7ae077eb8083ccc7c1bfc838344ac590 (patch) | |
| tree | dfee7af0eff981b941db6bdbd1d5f039f9f85407 /arch/arm64/mm/init.c | |
| parent | a10d60c08cc3bbea9195e2b36440f557373623eb (diff) | |
| parent | 0bdb3ccd02509a4380d54efd85effc6a9902d4fd (diff) | |
Merge branch 'perf/urgent' into perf/core, to pick up fixes and refresh the branch
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm64/mm/init.c')
| -rw-r--r-- | arch/arm64/mm/init.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 091d428d64ac..f43db8a69262 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -71,7 +71,7 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max) /* 4GB maximum for 32-bit only capable devices */ if (IS_ENABLED(CONFIG_ZONE_DMA)) { unsigned long max_dma_phys = - (unsigned long)dma_to_phys(NULL, DMA_BIT_MASK(32) + 1); + (unsigned long)(dma_to_phys(NULL, DMA_BIT_MASK(32)) + 1); max_dma = max(min, min(max, max_dma_phys >> PAGE_SHIFT)); zone_size[ZONE_DMA] = max_dma - min; } @@ -126,6 +126,8 @@ static void arm64_memory_present(void) void __init arm64_memblock_init(void) { + phys_addr_t dma_phys_limit = 0; + /* Register the kernel text, kernel data and initrd with memblock */ memblock_reserve(__pa(_text), _end - _text); #ifdef CONFIG_BLK_DEV_INITRD @@ -141,7 +143,11 @@ void __init arm64_memblock_init(void) memblock_reserve(__pa(idmap_pg_dir), IDMAP_DIR_SIZE); early_init_fdt_scan_reserved_mem(); - dma_contiguous_reserve(0); + + /* 4GB maximum for 32-bit only capable devices */ + if (IS_ENABLED(CONFIG_ZONE_DMA)) + dma_phys_limit = dma_to_phys(NULL, DMA_BIT_MASK(32)) + 1; + dma_contiguous_reserve(dma_phys_limit); memblock_allow_resize(); memblock_dump_all(); |