forked from luck/tmp_suning_uos_patched
15d5761ad3
CFLAGS_REMOVE_<file>.o filters out flags when compiling a particular
object, but there is no convenient way to do that for every object in
a directory.
Add ccflags-remove-y and asflags-remove-y to make it easily.
Use ccflags-remove-y to clean up some Makefiles.
The add/remove order works as follows:
[1] KBUILD_CFLAGS specifies compiler flags used globally
[2] ccflags-y adds compiler flags for all objects in the
current Makefile
[3] ccflags-remove-y removes compiler flags for all objects in the
current Makefile (New feature)
[4] CFLAGS_<file> adds compiler flags per file.
[5] CFLAGS_REMOVE_<file> removes compiler flags per file.
Having [3] before [4] allows us to remove flags from most (but not all)
objects in the current Makefile.
For example, kernel/trace/Makefile removes $(CC_FLAGS_FTRACE)
from all objects in the directory, then adds it back to
trace_selftest_dynamic.o and CFLAGS_trace_kprobe_selftest.o
The same applies to lib/livepatch/Makefile.
Please note ccflags-remove-y has no effect to the sub-directories.
In contrast, the previous notation got rid of compiler flags also from
all the sub-directories.
The following are not affected because they have no sub-directories:
arch/arm/boot/compressed/
arch/powerpc/xmon/
arch/sh/
kernel/trace/
However, lib/ has several sub-directories.
To keep the behavior, I added ccflags-remove-y to all Makefiles
in subdirectories of lib/, except the following:
lib/vdso/Makefile - Kbuild does not descend into this Makefile
lib/raid/test/Makefile - This is not used for the kernel build
I think commit 2464a609de ("ftrace: do not trace library functions")
excluded too much. In the next commit, I will remove ccflags-remove-y
from the sub-directories of lib/.
Suggested-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Acked-by: Brendan Higgins <brendanhiggins@google.com> (KUnit)
Tested-by: Anders Roxell <anders.roxell@linaro.org>
97 lines
3.2 KiB
Makefile
97 lines
3.2 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
# Do not instrument the tracer itself:
|
|
|
|
ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE)
|
|
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
|
|
# Avoid recursion due to instrumentation.
|
|
KCSAN_SANITIZE := n
|
|
|
|
ifdef CONFIG_FTRACE_SELFTEST
|
|
# selftest needs instrumentation
|
|
CFLAGS_trace_selftest_dynamic.o = $(CC_FLAGS_FTRACE)
|
|
obj-y += trace_selftest_dynamic.o
|
|
endif
|
|
endif
|
|
|
|
ifdef CONFIG_FTRACE_STARTUP_TEST
|
|
CFLAGS_trace_kprobe_selftest.o = $(CC_FLAGS_FTRACE)
|
|
obj-$(CONFIG_KPROBE_EVENTS) += trace_kprobe_selftest.o
|
|
endif
|
|
|
|
# If unlikely tracing is enabled, do not trace these files
|
|
ifdef CONFIG_TRACING_BRANCHES
|
|
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
|
|
endif
|
|
|
|
# for GCOV coverage profiling
|
|
ifdef CONFIG_GCOV_PROFILE_FTRACE
|
|
GCOV_PROFILE := y
|
|
endif
|
|
|
|
CFLAGS_trace_benchmark.o := -I$(src)
|
|
CFLAGS_trace_events_filter.o := -I$(src)
|
|
|
|
obj-$(CONFIG_TRACE_CLOCK) += trace_clock.o
|
|
|
|
obj-$(CONFIG_FUNCTION_TRACER) += libftrace.o
|
|
obj-$(CONFIG_RING_BUFFER) += ring_buffer.o
|
|
obj-$(CONFIG_RING_BUFFER_BENCHMARK) += ring_buffer_benchmark.o
|
|
|
|
obj-$(CONFIG_TRACING) += trace.o
|
|
obj-$(CONFIG_TRACING) += trace_output.o
|
|
obj-$(CONFIG_TRACING) += trace_seq.o
|
|
obj-$(CONFIG_TRACING) += trace_stat.o
|
|
obj-$(CONFIG_TRACING) += trace_printk.o
|
|
obj-$(CONFIG_TRACING_MAP) += tracing_map.o
|
|
obj-$(CONFIG_PREEMPTIRQ_DELAY_TEST) += preemptirq_delay_test.o
|
|
obj-$(CONFIG_SYNTH_EVENT_GEN_TEST) += synth_event_gen_test.o
|
|
obj-$(CONFIG_KPROBE_EVENT_GEN_TEST) += kprobe_event_gen_test.o
|
|
obj-$(CONFIG_CONTEXT_SWITCH_TRACER) += trace_sched_switch.o
|
|
obj-$(CONFIG_FUNCTION_TRACER) += trace_functions.o
|
|
obj-$(CONFIG_PREEMPTIRQ_TRACEPOINTS) += trace_preemptirq.o
|
|
obj-$(CONFIG_IRQSOFF_TRACER) += trace_irqsoff.o
|
|
obj-$(CONFIG_PREEMPT_TRACER) += trace_irqsoff.o
|
|
obj-$(CONFIG_SCHED_TRACER) += trace_sched_wakeup.o
|
|
obj-$(CONFIG_HWLAT_TRACER) += trace_hwlat.o
|
|
obj-$(CONFIG_NOP_TRACER) += trace_nop.o
|
|
obj-$(CONFIG_STACK_TRACER) += trace_stack.o
|
|
obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o
|
|
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += trace_functions_graph.o
|
|
obj-$(CONFIG_TRACE_BRANCH_PROFILING) += trace_branch.o
|
|
obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
|
|
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += fgraph.o
|
|
ifeq ($(CONFIG_BLOCK),y)
|
|
obj-$(CONFIG_EVENT_TRACING) += blktrace.o
|
|
endif
|
|
obj-$(CONFIG_EVENT_TRACING) += trace_events.o
|
|
obj-$(CONFIG_EVENT_TRACING) += trace_export.o
|
|
obj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.o
|
|
ifeq ($(CONFIG_PERF_EVENTS),y)
|
|
obj-$(CONFIG_EVENT_TRACING) += trace_event_perf.o
|
|
endif
|
|
obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
|
|
obj-$(CONFIG_EVENT_TRACING) += trace_events_trigger.o
|
|
obj-$(CONFIG_TRACE_EVENT_INJECT) += trace_events_inject.o
|
|
obj-$(CONFIG_SYNTH_EVENTS) += trace_events_synth.o
|
|
obj-$(CONFIG_HIST_TRIGGERS) += trace_events_hist.o
|
|
obj-$(CONFIG_BPF_EVENTS) += bpf_trace.o
|
|
obj-$(CONFIG_KPROBE_EVENTS) += trace_kprobe.o
|
|
obj-$(CONFIG_TRACEPOINTS) += power-traces.o
|
|
ifeq ($(CONFIG_PM),y)
|
|
obj-$(CONFIG_TRACEPOINTS) += rpm-traces.o
|
|
endif
|
|
ifeq ($(CONFIG_TRACING),y)
|
|
obj-$(CONFIG_KGDB_KDB) += trace_kdb.o
|
|
endif
|
|
obj-$(CONFIG_DYNAMIC_EVENTS) += trace_dynevent.o
|
|
obj-$(CONFIG_PROBE_EVENTS) += trace_probe.o
|
|
obj-$(CONFIG_UPROBE_EVENTS) += trace_uprobe.o
|
|
obj-$(CONFIG_BOOTTIME_TRACING) += trace_boot.o
|
|
|
|
obj-$(CONFIG_TRACEPOINT_BENCHMARK) += trace_benchmark.o
|
|
|
|
libftrace-y := ftrace.o
|