From c0a80c0c27e5e65b180a25e6c4c2f7ef9e386cd3 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Fri, 9 Jan 2015 13:06:33 +0100 Subject: ftrace: allow architectures to specify ftrace compile options If the kernel is compiled with function tracer support the -pg compile option is passed to gcc to generate extra code into the prologue of each function. This patch replaces the "open-coded" -pg compile flag with a CC_FLAGS_FTRACE makefile variable which architectures can override if a different option should be used for code generation. Acked-by: Steven Rostedt Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- kernel/Makefile | 4 ++-- kernel/events/Makefile | 2 +- kernel/locking/Makefile | 8 ++++---- kernel/sched/Makefile | 2 +- kernel/trace/Makefile | 4 ++-- 5 files changed, 10 insertions(+), 10 deletions(-) (limited to 'kernel') diff --git a/kernel/Makefile b/kernel/Makefile index a59481a3fa6c..13af308f2460 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -13,8 +13,8 @@ obj-y = fork.o exec_domain.o panic.o \ ifdef CONFIG_FUNCTION_TRACER # Do not trace debug files and internal ftrace files -CFLAGS_REMOVE_cgroup-debug.o = -pg -CFLAGS_REMOVE_irq_work.o = -pg +CFLAGS_REMOVE_cgroup-debug.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE) endif # cond_syscall is currently not LTO compatible diff --git a/kernel/events/Makefile b/kernel/events/Makefile index 103f5d147b2f..2925188f50ea 100644 --- a/kernel/events/Makefile +++ b/kernel/events/Makefile @@ -1,5 +1,5 @@ ifdef CONFIG_FUNCTION_TRACER -CFLAGS_REMOVE_core.o = -pg +CFLAGS_REMOVE_core.o = $(CC_FLAGS_FTRACE) endif obj-y := core.o ring_buffer.o callchain.o diff --git a/kernel/locking/Makefile b/kernel/locking/Makefile index 8541bfdfd232..4caca3f7af53 100644 --- a/kernel/locking/Makefile +++ b/kernel/locking/Makefile @@ -2,10 +2,10 @@ obj-y += mutex.o semaphore.o rwsem.o mcs_spinlock.o ifdef CONFIG_FUNCTION_TRACER -CFLAGS_REMOVE_lockdep.o = -pg -CFLAGS_REMOVE_lockdep_proc.o = -pg -CFLAGS_REMOVE_mutex-debug.o = -pg -CFLAGS_REMOVE_rtmutex-debug.o = -pg +CFLAGS_REMOVE_lockdep.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_lockdep_proc.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_mutex-debug.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_rtmutex-debug.o = $(CC_FLAGS_FTRACE) endif obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o diff --git a/kernel/sched/Makefile b/kernel/sched/Makefile index ab32b7b0db5c..46be87024875 100644 --- a/kernel/sched/Makefile +++ b/kernel/sched/Makefile @@ -1,5 +1,5 @@ ifdef CONFIG_FUNCTION_TRACER -CFLAGS_REMOVE_clock.o = -pg +CFLAGS_REMOVE_clock.o = $(CC_FLAGS_FTRACE) endif ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y) diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index 67d6369ddf83..9a7e0e60a1a8 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile @@ -3,11 +3,11 @@ ifdef CONFIG_FUNCTION_TRACER ORIG_CFLAGS := $(KBUILD_CFLAGS) -KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS)) +KBUILD_CFLAGS = $(subst $(CC_FLAGS_FTRACE),,$(ORIG_CFLAGS)) ifdef CONFIG_FTRACE_SELFTEST # selftest needs instrumentation -CFLAGS_trace_selftest_dynamic.o = -pg +CFLAGS_trace_selftest_dynamic.o = $(CC_FLAGS_FTRACE) obj-y += trace_selftest_dynamic.o endif endif -- cgit