[PATCH v3 12/13] ARM: mach-bcm: disable ftrace in SMC invocation routines

[Ard Biesheuvel]

The SMC calling convention uses R7 as an argument register, which
conflicts with its use as a frame pointer when building in Thumb2 mode.
Given that Clang with ftrace does not permit frame pointers to be
enabled, let's omit this compilation unit from ftrace instrumentation.

Signed-off-by: Ard Biesheuvel <ardb at kernel.org>
---
 arch/arm/mach-bcm/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile
index 7baa8c9427d5..b2394ddb0558 100644
--- a/arch/arm/mach-bcm/Makefile
+++ b/arch/arm/mach-bcm/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_ARCH_BCM_MOBILE_L2_CACHE) += kona_l2_cache.o
 
 # Support for secure monitor traps
 obj-$(CONFIG_ARCH_BCM_MOBILE_SMC) += bcm_kona_smc.o
+CFLAGS_REMOVE_bcm_kona_smc.o += $(CC_FLAGS_FTRACE)
 
 # BCM2835
 ifeq ($(CONFIG_ARCH_BCM2835),y)
-- 
2.30.2