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LoongArch: Avoid uninitialized alignment_mask

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The hardware monitoring points for instruction fetching and load/store
operations need to align 4 bytes and 1/2/4/8 bytes respectively.

Reported-by: Colin King <colin.i.king@gmail.com>
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Qing Zhang 2023-06-15 14:35:52 +08:00 committed by Huacai Chen
parent 962369120d
commit 0246d0aaf0
1 changed files with 2 additions and 0 deletions
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2
arch/loongarch/kernel/hw_breakpoint.c
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@ -396,6 +396,8 @@ int hw_breakpoint_arch_parse(struct perf_event *bp,
if (hw->ctrl.type != LOONGARCH_BREAKPOINT_EXECUTE)
alignment_mask = 0x7;
else
alignment_mask = 0x3;
offset = hw->address & alignment_mask;
hw->address &= ~alignment_mask;