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RISC-V: Set maximum number of mapped pages correctly

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[ Upstream commit d0d8aae64566b753c4330fbd5944b88af035f299 ]

Currently, maximum number of mapper pages are set to the pfn calculated
from the memblock size of the memblock containing kernel. This will work
until that memblock spans the entire memory. However, it will be set to
a wrong value if there are multiple memblocks defined in kernel
(e.g. with efi runtime services).

Set the the maximum value to the pfn calculated from dram size.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Atish Patra 2020-07-15 16:30:07 -07:00 • committed by Greg Kroah-Hartman
commit f88c909dc2
1 changed files with 1 additions and 1 deletions
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2
arch/riscv/mm/init.c
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@ -115,9 +115,9 @@ void __init setup_bootmem(void)
/* Reserve from the start of the kernel to the end of the kernel */
memblock_reserve(vmlinux_start, vmlinux_end - vmlinux_start);
set_max_mapnr(PFN_DOWN(mem_size));
max_pfn = PFN_DOWN(memblock_end_of_DRAM());
max_low_pfn = max_pfn;
set_max_mapnr(max_low_pfn);
#ifdef CONFIG_BLK_DEV_INITRD
setup_initrd();