[PATCH v4 3/6] arm64: hw_breakpoint: Add lockdep_assert_irqs_disabled() on install/uninstall

[Rob Herring (Arm)]

The breakpoint install/uninstall/restore code depends on interrupts
being disabled. Make this requirement explicit with a
lockdep_assert_irqs_disabled() assertion.

Signed-off-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
---
 arch/arm64/kernel/hw_breakpoint.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index bb39bc759810..a9266dc710b4 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -231,6 +231,8 @@ static int hw_breakpoint_control(struct perf_event *bp,
 	enum dbg_active_el dbg_el = debug_exception_level(info->ctrl.privilege);
 	u32 ctrl;
 
+	lockdep_assert_irqs_disabled();
+
 	if (info->ctrl.type == ARM_BREAKPOINT_EXECUTE) {
 		/* Breakpoint */
 		ctrl_reg = AARCH64_DBG_REG_BCR;

-- 
2.53.0