If build kernel without "O=dir", below error will be seen:

In file included from drivers/tee/optee/optee_trace.h:67, from drivers/tee/optee/call.c:18: ./include/trace/define_trace.h:95:42: fatal error: ./optee_trace.h: No such file or directory 95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | ^ compilation terminated.

Fix it by adding below line to Makefile: CFLAGS_call.o := -I$(src)

Tested with and without "O=dir", both can build successfully.

Reported-by: Guenter Roeck linux@roeck-us.net Suggested-by: Steven Rostedt rostedt@goodmis.org Signed-off-by: Jisheng Zhang Jisheng.Zhang@synaptics.com --- drivers/tee/optee/Makefile | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/tee/optee/Makefile b/drivers/tee/optee/Makefile index 56263ae3b1d7..3aa33ea9e6a6 100644 --- a/drivers/tee/optee/Makefile +++ b/drivers/tee/optee/Makefile @@ -6,3 +6,6 @@ optee-objs += rpc.o optee-objs += supp.o optee-objs += shm_pool.o optee-objs += device.o + +# for tracing framework to find optee_trace.h +CFLAGS_call.o := -I$(src)