# 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-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 d4252071b97d2027d246f6a82cbee4d52f618b47
# < make -s -j 32 ARCH=sparc O=/kisskb/build/linus_sparc-allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  allmodconfig
# Added to kconfig CONFIG_64BIT=n
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_HAVE_FTRACE_MCOUNT_RECORD=n
# Added to kconfig CONFIG_SAMPLES=n
# Added to kconfig CONFIG_MODULE_SIG=n
# < make -s -j 32 ARCH=sparc O=/kisskb/build/linus_sparc-allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  help
# make -s -j 32 ARCH=sparc O=/kisskb/build/linus_sparc-allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  olddefconfig
# make -s -j 32 ARCH=sparc O=/kisskb/build/linus_sparc-allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  
<stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp]
WARNING: modpost: EXPORT symbol "empty_zero_page" [vmlinux] version generation failed, symbol will not be versioned.
Is "empty_zero_page" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__udelay" [vmlinux] version generation failed, symbol will not be versioned.
Is "__udelay" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__ndelay" [vmlinux] version generation failed, symbol will not be versioned.
Is "__ndelay" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__ashldi3" [vmlinux] version generation failed, symbol will not be versioned.
Is "__ashldi3" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__ashrdi3" [vmlinux] version generation failed, symbol will not be versioned.
Is "__ashrdi3" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "bzero_1page" [vmlinux] version generation failed, symbol will not be versioned.
Is "bzero_1page" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__copy_1page" [vmlinux] version generation failed, symbol will not be versioned.
Is "__copy_1page" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__divdi3" [vmlinux] version generation failed, symbol will not be versioned.
Is "__divdi3" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "___rw_read_enter" [vmlinux] version generation failed, symbol will not be versioned.
Is "___rw_read_enter" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "___rw_read_exit" [vmlinux] version generation failed, symbol will not be versioned.
Is "___rw_read_exit" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "___rw_read_try" [vmlinux] version generation failed, symbol will not be versioned.
Is "___rw_read_try" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "___rw_write_enter" [vmlinux] version generation failed, symbol will not be versioned.
Is "___rw_write_enter" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__lshrdi3" [vmlinux] version generation failed, symbol will not be versioned.
Is "__lshrdi3" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__muldi3" [vmlinux] version generation failed, symbol will not be versioned.
Is "__muldi3" prototyped in <asm/asm-prototypes.h>?
arch/sparc/kernel/head_32.o: In function `current_pc':
(.head.text+0x5040): relocation truncated to fit: R_SPARC_WDISP22 against `.init.text'
arch/sparc/kernel/head_32.o: In function `halt_notsup':
(.head.text+0x5100): relocation truncated to fit: R_SPARC_WDISP22 against `.init.text'
arch/sparc/kernel/head_32.o: In function `leon_init':
(.init.text+0xa4): relocation truncated to fit: R_SPARC_WDISP22 against symbol `leon_smp_cpu_startup' defined in .text section in arch/sparc/kernel/trampoline_32.o
arch/sparc/kernel/process_32.o:(.fixup+0x4): relocation truncated to fit: R_SPARC_WDISP22 against `.text'
arch/sparc/kernel/process_32.o:(.fixup+0xc): relocation truncated to fit: R_SPARC_WDISP22 against `.text'
arch/sparc/kernel/signal_32.o:(.fixup+0x4): relocation truncated to fit: R_SPARC_WDISP22 against `.text'
arch/sparc/kernel/signal_32.o:(.fixup+0x10): relocation truncated to fit: R_SPARC_WDISP22 against `.text'
arch/sparc/kernel/signal_32.o:(.fixup+0x1c): relocation truncated to fit: R_SPARC_WDISP22 against `.text'
arch/sparc/kernel/signal_32.o:(.fixup+0x28): relocation truncated to fit: R_SPARC_WDISP22 against `.text'
arch/sparc/kernel/signal_32.o:(.fixup+0x34): relocation truncated to fit: R_SPARC_WDISP22 against `.text'
arch/sparc/kernel/signal_32.o:(.fixup+0x40): additional relocation overflows omitted from the output
make[1]: *** [/kisskb/src/Makefile:1165: vmlinux] Error 1
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 32 ARCH=sparc O=/kisskb/build/linus_sparc-allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_sparc-allmodconfig_sparc64-gcc5
# Build took: 0:16:00.903772