Buildresult: linus/at91_dt_defconfig/arm-gcc4.9 built on Feb 24 2021, 09:56

kisskb

Revisions | Branches | Compilers | Configs | Build Results | Build Failures |

Status:	OK
Date/Time:	Feb 24 2021, 09:56
Duration:	0:01:34.170470
Builder:	blade4b
Revision:	Kbuild: disable TRIM_UNUSED_KSYMS option (`5cf0fd591f2e7833405bdc7ce2176c3502e8a11e)`
Target:	linus/at91_dt_defconfig/arm-gcc4.9
Branch:	linus
Compiler:	arm-gcc4.9 (arm-linux-gnueabi-gcc (GCC) 4.9.4 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	at91_dt_defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e^{commit} 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e already have revision, skipping fetch # git checkout -q -f -B kisskb 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e # git clean -qxdf # < git log -1 # commit 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e # Author: Linus Torvalds <torvalds@linux-foundation.org> # Date: Tue Feb 23 12:21:58 2021 -0800 # # Kbuild: disable TRIM_UNUSED_KSYMS option # # The removal of EXPORT_UNUSED_SYMBOL() in commit 367948220fce looks like # (and was sold as) a no-op, but it actually had a rather serious and # subtle side effect: the UNUSED_SYMBOLS option not only enabled the # removed (unused) functionality, it also _disabled_ the TRIM_UNUSED_KSYMS # functionality. # # And it turns out that TRIM_UNUSED_KSYMS is a huge time waste, and takes # up a third of the kernel build time for me. For no actual upside, since # no distro is likely to ever be able to enable it (because they all # support external kernel modules). # # Rather than re-enable EXPORT_UNUSED_SYMBOL, this just disables the # TRIM_UNUSED_KSYMS option by marking it broken. I'm tempted to just # remove the support entirely, but maybe somebody has a use-case and can # fix the behavior of it. # # I could have just disabled it for COMPILE_TEST, but it really smells # like the TRIM_UNUSED_KSYMS option is badly done and not really useful, # so this takes the more direct approach - let's see if anybody ever # actually notices or complains. # # Cc: Miroslav Benes <mbenes@suse.cz> # Cc: Emil Velikov <emil.l.velikov@gmail.com> # Cc: Christoph Hellwig <hch@lst.de> # Cc: Jessica Yu <jeyu@kernel.org> # Fixes: 367948220fce ("module: remove EXPORT_UNUSED_SYMBOL*") # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version # < git log --format=%s --max-count=1 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e # < make -s -j 24 ARCH=arm O=/kisskb/build/linus_at91_dt_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- at91_dt_defconfig # < make -s -j 24 ARCH=arm O=/kisskb/build/linus_at91_dt_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- help # make -s -j 24 ARCH=arm O=/kisskb/build/linus_at91_dt_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- olddefconfig # make -s -j 24 ARCH=arm O=/kisskb/build/linus_at91_dt_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- Completed OK # rm -rf /kisskb/build/linus_at91_dt_defconfig_arm-gcc4.9 # Build took: 0:01:34.170470

© Michael Ellerman 2006-2018.