1 # SPDX-License-Identifier: GPL-2.0 2 3 # The compilers are complaining about unused variables inside an if(0) scope 4 # block. This is daft, shut them up. 5 ccflags-y += $(call cc-disable-warning, unused-but-set-variable) 6 7 # These files are disabled because they produce non-interesting flaky coverage 8 # that is not a function of syscall inputs. E.g. involuntary context switches. 9 KCOV_INSTRUMENT := n 10 11 # Disable KCSAN to avoid excessive noise and performance degradation. To avoid 12 # false positives ensure barriers implied by sched functions are instrumented. 13 KCSAN_SANITIZE := n 14 KCSAN_INSTRUMENT_BARRIERS := y 15 16 ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y) 17 # According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is 18 # needed for x86 only. Why this used to be enabled for all architectures is beyond 19 # me. I suspect most platforms don't need this, but until we know that for sure 20 # I turn this off for IA-64 only. Andreas Schwab says it's also needed on m68k 21 # to get a correct value for the wait-channel (WCHAN in ps). --davidm 22 CFLAGS_core.o := $(PROFILING) -fno-omit-frame-pointer 23 endif 24 25 # 26 # Build efficiency: 27 # 28 # These compilation units have roughly the same size and complexity - so their 29 # build parallelizes well and finishes roughly at once: 30 # 31 obj-y += core.o 32 obj-y += fair.o 33 obj-y += build_policy.o 34 obj-y += build_utility.o
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