# git rev-parse -q --verify d4252071b97d2027d246f6a82cbee4d52f618b47^{commit}
d4252071b97d2027d246f6a82cbee4d52f618b47
already have revision, skipping fetch
# git checkout -q -f -B kisskb d4252071b97d2027d246f6a82cbee4d52f618b47
# git clean -qxdf
# < git log -1
# commit d4252071b97d2027d246f6a82cbee4d52f618b47
# Author: Mikulas Patocka <mpatocka@redhat.com>
# Date:   Tue Aug 9 14:32:13 2022 -0400
# 
#     add barriers to buffer_uptodate and set_buffer_uptodate
#     
#     Let's have a look at this piece of code in __bread_slow:
#     
#             get_bh(bh);
#             bh->b_end_io = end_buffer_read_sync;
#             submit_bh(REQ_OP_READ, 0, bh);
#             wait_on_buffer(bh);
#             if (buffer_uptodate(bh))
#                     return bh;
#     
#     Neither wait_on_buffer nor buffer_uptodate contain any memory barrier.
#     Consequently, if someone calls sb_bread and then reads the buffer data,
#     the read of buffer data may be executed before wait_on_buffer(bh) on
#     architectures with weak memory ordering and it may return invalid data.
#     
#     Fix this bug by adding a memory barrier to set_buffer_uptodate and an
#     acquire barrier to buffer_uptodate (in a similar way as
#     folio_test_uptodate and folio_mark_uptodate).
#     
#     Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
#     Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
#     Cc: stable@vger.kernel.org
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/mips-linux/bin/mips-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/mips-linux/bin/mips-linux-ld --version
# < git log --format=%s --max-count=1 d4252071b97d2027d246f6a82cbee4d52f618b47
# < make -s -j 32 ARCH=mips O=/kisskb/build/linus_micro32r2_defconfig_mips-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/mips-linux/bin/mips-linux-  micro32r2_defconfig
./.config.micro32r2_defconfig:95:warning: override: CPU_BIG_ENDIAN changes choice state
.config:94:warning: override: CPU_BIG_ENDIAN changes choice state
# < make -s -j 32 ARCH=mips O=/kisskb/build/linus_micro32r2_defconfig_mips-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/mips-linux/bin/mips-linux-  help
# make -s -j 32 ARCH=mips O=/kisskb/build/linus_micro32r2_defconfig_mips-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/mips-linux/bin/mips-linux-  olddefconfig
# make -s -j 32 ARCH=mips O=/kisskb/build/linus_micro32r2_defconfig_mips-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/mips-linux/bin/mips-linux-  
/kisskb/src/arch/mips/boot/dts/img/boston.dts:128.19-178.5: Warning (pci_device_reg): /pci@14000000/pci2_root@0,0,0: PCI unit address format error, expected "0,0"
{standard input}: Assembler messages:
{standard input}:1339: Error: branch to a symbol in another ISA mode
make[3]: *** [/kisskb/src/scripts/Makefile.build:249: arch/mips/kernel/smp-cps.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:466: arch/mips/kernel] Error 2
make[1]: *** [/kisskb/src/Makefile:1844: arch/mips] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 32 ARCH=mips O=/kisskb/build/linus_micro32r2_defconfig_mips-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/mips-linux/bin/mips-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_micro32r2_defconfig_mips-gcc11
# Build took: 0:01:02.692306