kernel/sched/Makefile

   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