LoongArch: Avoid uninitialized alignment_mask

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>

diff --git a/arch/loongarch/kernel/hw_breakpoint.c b/arch/loongarch/kernel/hw_breakpoint.c
index 2406c95b34cc4f0023f1db8755e60ff7ea0cc18a..021b59c248fac64413ad70a5387ee7a3f698b92d 100644 (file)
--- a/arch/loongarch/kernel/hw_breakpoint.c
+++ b/arch/loongarch/kernel/hw_breakpoint.c
@@ -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;