[PATCH] LoongArch: Avoid uninitialized alignment_mask

[Qing Zhang]

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

Reported-by: Colin King <colin.i.king@xxxxxxxxx>
Signed-off-by: Qing Zhang <zhangqing@xxxxxxxxxxx>
---
 arch/loongarch/kernel/hw_breakpoint.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/loongarch/kernel/hw_breakpoint.c b/arch/loongarch/kernel/hw_breakpoint.c
index 2406c95b34cc..021b59c248fa 100644
--- 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;
-- 
2.20.1