ftrace: Look up the address of return_to_handler() using helpers (a3db31ff) · Commits · 戴 / test

This ensures that we use the right address on architectures that use function descriptors. Signed-off-by:

kernel/trace/fgraph.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -276,7 +276,7 @@ unsigned long ftrace_graph_ret_addr(struct task_struct task, int idx,
		int index = task->curr_ret_stack;
		int i;

		if (ret != (unsigned long)return_to_handler)
		if (ret != (unsigned long)dereference_kernel_function_descriptor(return_to_handler))
		return ret;

		if (index < 0)
		@@ -294,7 +294,7 @@ unsigned long ftrace_graph_ret_addr(struct task_struct task, int idx,
		{
		int task_idx;

		if (ret != (unsigned long)return_to_handler)
		if (ret != (unsigned long)dereference_kernel_function_descriptor(return_to_handler))
		return ret;

		task_idx = task->curr_ret_stack;