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| author | Huacai Chen <chenhuacai@loongson.cn> | 2023-09-27 16:19:13 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-06 14:57:01 +0200 |
| commit | 490f3b805ee3639e8b69c91d63e1ea76189950ae (patch) | |
| tree | 9bfc43a52bbdbd791b041194465b7c89bf8333bf | |
| parent | 7bc8585aa0719dd1996be804dd4fba601d48f3d6 (diff) | |
| download | linux-stable-490f3b805ee3639e8b69c91d63e1ea76189950ae.tar.gz linux-stable-490f3b805ee3639e8b69c91d63e1ea76189950ae.tar.bz2 linux-stable-490f3b805ee3639e8b69c91d63e1ea76189950ae.zip | |
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: <stable@vger.kernel.org>
Fixes: d4b6f1562a3c3284adce ("LoongArch: Add Non-Uniform Memory Access (NUMA) support")
Signed-off-by: Chong Qiao <qiaochong@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/loongarch/kernel/numa.c | 2 |
1 files changed, 1 insertions, 1 deletions
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 */ } |