| # 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 <alan@linuxcare.com.au>, 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 |
