Messages in this thread Patch in this message | | | From | Atish Patra <> | Subject | [PATCH] RISCV: Fix end PFN for low memory | Date | Tue, 11 Sep 2018 11:30:18 -0700 |
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Use memblock_end_of_DRAM which provides correct last low memory PFN. Without that, DMA32 region becomes empty resulting in zero pages being allocated for DMA32.
This patch is based on earlier patch from palmer which never merged into 4.19. I just edited the commit text to make more sense.
Signed-off-by: Atish Patra <atish.patra@wdc.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com> --- arch/riscv/kernel/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index db20dc63..a192bf8a 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -193,7 +193,7 @@ static void __init setup_bootmem(void) BUG_ON(mem_size == 0); set_max_mapnr(PFN_DOWN(mem_size)); - max_low_pfn = pfn_base + PFN_DOWN(mem_size); + max_low_pfn = memblock_end_of_DRAM(); #ifdef CONFIG_BLK_DEV_INITRD setup_initrd(); -- 2.7.4
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