On Mon, Aug 06, 2018 at 03:17:47PM +0200, Vasily Gorbik wrote: > Utilize -mfentry and -mnop-mcount gcc options together with > -mrecord-mcount to get compiler generated calls to the profiling functions > as nops which are compatible with current -mhotpatch=0,3 approach. At the > same time -mrecord-mcount enables __mcount_loc section generation by > the compiler which allows to avoid using scripts/recordmcount.pl script. > > Signed-off-by: Vasily Gorbik <g...@linux.ibm.com> > --- > arch/s390/Kconfig | 2 ++ > arch/s390/Makefile | 16 +++++++++------- > arch/s390/include/asm/ftrace.h | 6 +++--- > arch/s390/kernel/ftrace.c | 2 +- > arch/s390/kernel/mcount.S | 2 +- > 5 files changed, 16 insertions(+), 12 deletions(-)
Do you have numbers which tell how much this reduces the compile time of the kernel on s390? I assume this change makes quite some difference. Reviewed-by: Heiko Carstens <heiko.carst...@de.ibm.com>
