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authorYinan Liu <yinan@linux.alibaba.com>2021-12-12 14:33:58 +0300
committerSteven Rostedt <rostedt@goodmis.org>2022-01-14 00:23:04 +0300
commit72b3942a173c387b27860ba1069636726e208777 (patch)
treef5c9e5f29af4aeae0dbaf9d7232dd985cc5cf4b3 /scripts/Makefile
parent1c1857d400355e96f0fe8b32adc6fa7594d03b52 (diff)
downloadlinux-72b3942a173c387b27860ba1069636726e208777.tar.xz
scripts: ftrace - move the sort-processing in ftrace_init
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>
Diffstat (limited to 'scripts/Makefile')
-rw-r--r--scripts/Makefile6
1 files changed, 5 insertions, 1 deletions
diff --git a/scripts/Makefile b/scripts/Makefile
index 9adb6d247818..b082d2f93357 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -17,6 +17,7 @@ hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert
hostprogs-always-$(CONFIG_SYSTEM_REVOCATION_LIST) += extract-cert
HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include
+HOSTLDLIBS_sorttable = -lpthread
HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include
HOSTCFLAGS_sign-file.o = $(CRYPTO_CFLAGS)
HOSTLDLIBS_sign-file = $(CRYPTO_LIBS)
@@ -29,7 +30,10 @@ ARCH := x86
endif
HOSTCFLAGS_sorttable.o += -I$(srctree)/tools/arch/x86/include
HOSTCFLAGS_sorttable.o += -DUNWINDER_ORC_ENABLED
-HOSTLDLIBS_sorttable = -lpthread
+endif
+
+ifdef CONFIG_DYNAMIC_FTRACE
+HOSTCFLAGS_sorttable.o += -DMCOUNT_SORT_ENABLED
endif
# The following programs are only built on demand