Messages in this thread Patch in this message | | | From | Jinyang He <> | Subject | [PATCH] MIPS: Fix unable to allocate memory for crashkernel | Date | Wed, 22 Jul 2020 18:24:38 +0800 |
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Use 0 as the align parameter in memblock_find_in_range() is incorrect when we allocate memory for crashkernel. It's finally used as by round_down(). Like this call tree:
mm/memblock.c
memblock_find_in_range └── memblock_find_in_range_node ├── __memblock_find_range_bottom_up │ └── round_down └── __memblock_find_range_top_down └── round_down
However, the round_down's second parameter must be a power of 2. The author mean not align. So change it from 0 to 1.
Signed-off-by: Jinyang He <hejinyang@loongson.cn> --- arch/mips/kernel/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 7b537fa..588b212 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -497,7 +497,7 @@ static void __init mips_parse_crashkernel(void) if (ret != 0 || crash_size <= 0) return; - if (!memblock_find_in_range(crash_base, crash_base + crash_size, crash_size, 0)) { + if (!memblock_find_in_range(crash_base, crash_base + crash_size, crash_size, 1)) { pr_warn("Invalid memory region reserved for crash kernel\n"); return; } -- 2.1.0
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