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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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72b3942a17
When the kernel starts, the initialization of ftrace takes up a portion of the time (approximately 6~8ms) to sort mcount addresses. We can save this time by moving mcount-sorting to compile time. Link: https://lkml.kernel.org/r/20211212113358.34208-2-yinan@linux.alibaba.com Signed-off-by: Yinan Liu <yinan@linux.alibaba.com> Reported-by: kernel test robot <lkp@intel.com> Reported-by: kernel test robot <oliver.sang@intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
50 lines
1.7 KiB
Makefile
50 lines
1.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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###
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# scripts contains sources for various helper programs used throughout
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# the kernel for the build process.
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CRYPTO_LIBS = $(shell pkg-config --libs libcrypto 2> /dev/null || echo -lcrypto)
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CRYPTO_CFLAGS = $(shell pkg-config --cflags libcrypto 2> /dev/null)
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hostprogs-always-$(CONFIG_BUILD_BIN2C) += bin2c
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hostprogs-always-$(CONFIG_KALLSYMS) += kallsyms
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hostprogs-always-$(BUILD_C_RECORDMCOUNT) += recordmcount
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hostprogs-always-$(CONFIG_BUILDTIME_TABLE_SORT) += sorttable
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hostprogs-always-$(CONFIG_ASN1) += asn1_compiler
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hostprogs-always-$(CONFIG_MODULE_SIG_FORMAT) += sign-file
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hostprogs-always-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += extract-cert
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hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert
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hostprogs-always-$(CONFIG_SYSTEM_REVOCATION_LIST) += extract-cert
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HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include
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HOSTLDLIBS_sorttable = -lpthread
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HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include
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HOSTCFLAGS_sign-file.o = $(CRYPTO_CFLAGS)
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HOSTLDLIBS_sign-file = $(CRYPTO_LIBS)
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HOSTCFLAGS_extract-cert.o = $(CRYPTO_CFLAGS)
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HOSTLDLIBS_extract-cert = $(CRYPTO_LIBS)
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ifdef CONFIG_UNWINDER_ORC
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ifeq ($(ARCH),x86_64)
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ARCH := x86
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endif
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HOSTCFLAGS_sorttable.o += -I$(srctree)/tools/arch/x86/include
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HOSTCFLAGS_sorttable.o += -DUNWINDER_ORC_ENABLED
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endif
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ifdef CONFIG_DYNAMIC_FTRACE
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HOSTCFLAGS_sorttable.o += -DMCOUNT_SORT_ENABLED
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endif
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# The following programs are only built on demand
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hostprogs += unifdef
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# The module linker script is preprocessed on demand
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targets += module.lds
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subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins
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subdir-$(CONFIG_MODVERSIONS) += genksyms
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subdir-$(CONFIG_SECURITY_SELINUX) += selinux
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# Let clean descend into subdirs
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subdir- += basic dtc gdb kconfig mod
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