Buildresult: linus/arm64-allmodconfig/arm64-gcc11 built on Mar 30 2022, 11:30

kisskb

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

Status:	Failed
Date/Time:	Mar 30 2022, 11:30
Duration:	0:07:35.926474
Builder:	ka7
Revision:	fs: fd tables have to be multiples of BITS_PER_LONG (`1c24a186398f59c80adb9a967486b65c1423a59d)`
Target:	linus/arm64-allmodconfig/arm64-gcc11
Branch:	linus
Compiler:	arm64-gcc11 (aarch64-linux-gcc (GCC) 11.1.0 / GNU ld (GNU Binutils) 2.36.1)
Config:	allmodconfig (download)
Log:	Download original Possible errors drivers/pci/controller/pci-hyperv.c:769:13: error: 'hv_set_msi_entry_from_desc' defined but not used [-Werror=unused-function] cc1: all warnings being treated as errors make[4]: * [scripts/Makefile.build:289: drivers/pci/controller/pci-hyperv.o] Error 1 make[3]: * [scripts/Makefile.build:551: drivers/pci/controller] Error 2 make[2]: * [scripts/Makefile.build:551: drivers/pci] Error 2 make[1]: * [Makefile:1830: drivers] Error 2 make: *** [Makefile:219: __sub-make] Error 2 No warnings found in log. Full Log # git rev-parse -q --verify 1c24a186398f59c80adb9a967486b65c1423a59d^{commit} 1c24a186398f59c80adb9a967486b65c1423a59d already have revision, skipping fetch # git checkout -q -f -B kisskb 1c24a186398f59c80adb9a967486b65c1423a59d # git clean -qxdf # < git log -1 # commit 1c24a186398f59c80adb9a967486b65c1423a59d # Author: Linus Torvalds <torvalds@linux-foundation.org> # Date: Tue Mar 29 15:06:39 2022 -0700 # # fs: fd tables have to be multiples of BITS_PER_LONG # # This has always been the rule: fdtables have several bitmaps in them, # and as a result they have to be sized properly for bitmaps. We walk # those bitmaps in chunks of 'unsigned long' in serveral cases, but even # when we don't, we use the regular kernel bitops that are defined to work # on arrays of 'unsigned long', not on some byte array. # # Now, the distinction between arrays of bytes and 'unsigned long' # normally only really ends up being noticeable on big-endian systems, but # Fedor Pchelkin and Alexey Khoroshilov reported that copy_fd_bitmaps() # could be called with an argument that wasn't even a multiple of # BITS_PER_BYTE. And then it fails to do the proper copy even on # little-endian machines. # # The bug wasn't in copy_fd_bitmap(), but in sane_fdtable_size(), which # didn't actually sanitize the fdtable size sufficiently, and never made # sure it had the proper BITS_PER_LONG alignment. # # That's partly because the alignment historically came not from having to # explicitly align things, but simply from previous fdtable sizes, and # from count_open_files(), which counts the file descriptors by walking # them one 'unsigned long' word at a time and thus naturally ends up doing # sizing in the proper 'chunks of unsigned long'. # # But with the introduction of close_range(), we now have an external # source of "this is how many files we want to have", and so # sane_fdtable_size() needs to do a better job. # # This also adds that explicit alignment to alloc_fdtable(), although # there it is mainly just for documentation at a source code level. The # arithmetic we do there to pick a reasonable fdtable size already aligns # the result sufficiently. # # In fact,clang notices that the added ALIGN() in that function doesn't # actually do anything, and does not generate any extra code for it. # # It turns out that gcc ends up confusing itself by combining a previous # constant-sized shift operation with the variable-sized shift operations # in roundup_pow_of_two(). And probably due to that doesn't notice that # the ALIGN() is a no-op. But that's a (tiny) gcc misfeature that doesn't # matter. Having the explicit alignment makes sense, and would actually # matter on a 128-bit architecture if we ever go there. # # This also adds big comments above both functions about how fdtable sizes # have to have that BITS_PER_LONG alignment. # # Fixes: 60997c3d45d9 ("close_range: add CLOSE_RANGE_UNSHARE") # Reported-by: Fedor Pchelkin <aissur0002@gmail.com> # Reported-by: Alexey Khoroshilov <khoroshilov@ispras.ru> # Link: https://lore.kernel.org/all/20220326114009.1690-1-aissur0002@gmail.com/ # Tested-and-acked-by: Christian Brauner <brauner@kernel.org> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version # < git log --format=%s --max-count=1 1c24a186398f59c80adb9a967486b65c1423a59d # < make -s -j 32 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux- allmodconfig # < make -s -j 32 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux- help # make -s -j 32 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux- olddefconfig # make -s -j 32 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux- /kisskb/src/drivers/pci/controller/pci-hyperv.c:769:13: error: 'hv_set_msi_entry_from_desc' defined but not used [-Werror=unused-function] 769 \| static void hv_set_msi_entry_from_desc(union hv_msi_entry msi_entry, \| ^~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors make[4]: [/kisskb/src/scripts/Makefile.build:289: drivers/pci/controller/pci-hyperv.o] Error 1 make[3]: * [/kisskb/src/scripts/Makefile.build:551: drivers/pci/controller] Error 2 make[2]: * [/kisskb/src/scripts/Makefile.build:551: drivers/pci] Error 2 make[2]: * Waiting for unfinished jobs.... make[1]: * [/kisskb/src/Makefile:1830: drivers] Error 2 make[1]: * Waiting for unfinished jobs.... make: *** [Makefile:219: __sub-make] Error 2 Command 'make -s -j 32 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/linus_arm64-allmodconfig_arm64-gcc11 # Build took: 0:07:35.926474

© Michael Ellerman 2006-2018.