[linux-block.git] / kernel / sched / Makefile

# 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
Commit	Line	Data
b2441318	1	# SPDX-License-Identifier: GPL-2.0
391e43da	2
37b47298 PZ	3	# The compilers are complaining about unused variables inside an if(0) scope
	4	# block. This is daft, shut them up.
	5	ccflags-y += $(call cc-disable-warning, unused-but-set-variable)
	6
5c9a8750 DV	7	# These files are disabled because they produce non-interesting flaky coverage
	8	# that is not a function of syscall inputs. E.g. involuntary context switches.
	9	KCOV_INSTRUMENT := n
	10
6f3f0c98 ME	11	# Disable KCSAN to avoid excessive noise and performance degradation. To avoid
6f3f0c98 ME	12	# false positives ensure barriers implied by sched functions are instrumented.
0ebba714	13	KCSAN_SANITIZE := n
6f3f0c98	14	KCSAN_INSTRUMENT_BARRIERS := y
0ebba714	15
391e43da PZ	16	ifneq ($(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
801c1419 IM	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
f96eca43	33	obj-y += build_policy.o
801c1419	34	obj-y += build_utility.o