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