# git rev-parse -q --verify 1a288d0d920dfb9747bbefc8d601a971885f470f^{commit}
1a288d0d920dfb9747bbefc8d601a971885f470f
already have revision, skipping fetch
# git checkout -q -f -B kisskb 1a288d0d920dfb9747bbefc8d601a971885f470f
# git clean -qxdf
# < git log -1
# commit 1a288d0d920dfb9747bbefc8d601a971885f470f
# Author: Denis Efremov <efremov@linux.com>
# Date:   Sun Jul 28 13:09:06 2019 +0300
# 
#     modpost: check for static EXPORT_SYMBOL* functions
#     
#     This patch adds a check to warn about static EXPORT_SYMBOL* functions
#     during the modpost. In most of the cases, a static symbol marked for
#     exporting is an odd combination that should be fixed either by deleting
#     the exporting mark or by removing the static attribute and adding the
#     appropriate declaration to headers.
#     
#     This check could help to detect the following problems:
#     1. 550113d4e9f5 ("i2c: add newly exported functions to the header, too")
#     2. 54638c6eaf44 ("net: phy: make exported variables non-static")
#     3. 98ef2046f28b ("mm: remove the exporting of totalram_pages")
#     4. 73df167c819e ("s390/zcrypt: remove the exporting of ap_query_configuration")
#     5. a57caf8c527f ("sunrpc/cache: remove the exporting of cache_seq_next")
#     6. e4e4730698c9 ("crypto: skcipher - remove the exporting of skcipher_walk_next")
#     7. 14b4c48bb1ce ("gve: Remove the exporting of gve_probe")
#     8. 9b79ee9773a8 ("scsi: libsas: remove the exporting of sas_wait_eh")
#     9. ...
#     
#     Build time impact, allmodconfig, Dell XPS 15 9570 (measurements 3x):
#     $ make mrproper; make allmodconfig; time make -j12; \
#       git checkout HEAD~1; \
#       make mrproper; make allmodconfig; time make -j12
#     1.
#        (with patch) 17635,94s user 1895,54s system 1085% cpu 29:59,22 total
#        (w/o  patch) 17275,42s user 1803,87s system 1112% cpu 28:35,66 total
#     2.
#        (with patch) 17369,51s user 1763,28s system 1111% cpu 28:41,47 total
#        (w/o  patch) 16880,50s user 1670,93s system 1113% cpu 27:46,56 total
#     3.
#        (with patch) 17937,88s user 1842,53s system 1109% cpu 29:42,26 total
#        (w/o  patch) 17267,55s user 1725,09s system 1111% cpu 28:28,17 total
#     
#     Thus, the current implementation adds approx. 1 min for allmodconfig.
#     
#     Acked-by: Emil Velikov <emil.l.velikov@gmail.com>
#     Signed-off-by: Denis Efremov <efremov@linux.com>
#     Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-ld --version
# < git log --format=%s --max-count=1 1a288d0d920dfb9747bbefc8d601a971885f470f
# < make -s -j 24 ARCH=s390 O=/kisskb/build/kbuild_s390-defconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  defconfig
# make -s -j 24 ARCH=s390 O=/kisskb/build/kbuild_s390-defconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  
cc1: error: unrecognized command line option '-mtune=zEC12'
cc1: error: unrecognized command line option '-mtune=zEC12'
make[2]: *** [/kisskb/src/scripts/Makefile.build:107: scripts/mod/devicetable-offsets.s] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:274: scripts/mod/empty.o] Error 1
make[1]: *** [/kisskb/src/Makefile:1122: prepare0] Error 2
make: *** [Makefile:179: sub-make] Error 2
Command 'make -s -j 24 ARCH=s390 O=/kisskb/build/kbuild_s390-defconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/kbuild_s390-defconfig_s390x
# Build took: 0:00:03.657681