From 490f3b805ee3639e8b69c91d63e1ea76189950ae Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Wed, 27 Sep 2023 16:19:13 +0800 Subject: LoongArch: numa: Fix high_memory calculation commit 1943feecf80e73ecc03ce40271f29c6cea142bac upstream. For 64bit kernel without HIGHMEM, high_memory is the virtual address of the highest physical address in the system. But __va(get_num_physpages() << PAGE_SHIFT) is not what we want for high_memory because there may be holes in the physical address space. On the other hand, max_low_pfn is calculated from memblock_end_of_DRAM(), which is exactly corresponding to the highest physical address, so use it for high_memory calculation. Cc: Fixes: d4b6f1562a3c3284adce ("LoongArch: Add Non-Uniform Memory Access (NUMA) support") Signed-off-by: Chong Qiao Signed-off-by: Huacai Chen Signed-off-by: Greg Kroah-Hartman --- arch/loongarch/kernel/numa.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/loongarch') diff --git a/arch/loongarch/kernel/numa.c b/arch/loongarch/kernel/numa.c index a13f92593cfd..f7ffce170213 100644 --- a/arch/loongarch/kernel/numa.c +++ b/arch/loongarch/kernel/numa.c @@ -453,7 +453,7 @@ void __init paging_init(void) void __init mem_init(void) { - high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT); + high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT); memblock_free_all(); setup_zero_pages(); /* This comes from node 0 */ } -- cgit v1.2.3