# git rev-parse -q --verify 2accfdb7eff65f390c4308b0e9cb7c3fe48ad63c^{commit}
2accfdb7eff65f390c4308b0e9cb7c3fe48ad63c
already have revision, skipping fetch
# git checkout -q -f -B kisskb 2accfdb7eff65f390c4308b0e9cb7c3fe48ad63c
# git clean -qxdf
# < git log -1
# commit 2accfdb7eff65f390c4308b0e9cb7c3fe48ad63c
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Mon Jul 29 10:58:28 2024 -0700
# 
#     profiling: attempt to remove per-cpu profile flip buffer
#     
#     This is the really old legacy kernel profiling code, which has long
#     since been obviated by "real profiling" (ie 'prof' and company), and
#     mainly remains as a source of syzbot reports.
#     
#     There are anecdotal reports that people still use it for boot-time
#     profiling, but it's unlikely that such use would care about the old NUMA
#     optimizations in this code from 2004 (commit ad02973d42: "profile: 512x
#     Altix timer interrupt livelock fix" in the BK import archive at [1])
#     
#     So in order to head off future syzbot reports, let's try to simplify
#     this code and get rid of the per-cpu profile buffers that are quite a
#     large portion of the complexity footprint of this thing (including CPU
#     hotplug callbacks etc).
#     
#     It's unlikely anybody will actually notice, or possibly, as Thomas put
#     it: "Only people who indulge in nostalgia will notice :)".
#     
#     That said, if it turns out that this code is actually actively used by
#     somebody, we can always revert this removal.  Thus the "attempt" in the
#     summary line.
#     
#     [ Note: in a small nod to "the profiling code can cause NUMA problems",
#       this also removes the "increment the last entry in the profiling array
#       on any unknown hits" logic. That would account any program counter in
#       a module to that single counter location, and might exacerbate any
#       NUMA cacheline bouncing issues ]
#     
#     Link: https://lore.kernel.org/all/CAHk-=wgs52BxT4Zjmjz8aNvHWKxf5_ThBY4bYL1Y6CTaNL2dTw@mail.gmail.com/
#     Link:  https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git [1]
#     Cc: Thomas Gleixner <tglx@linutronix.de>
#     Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-ld --version
# < git log --format=%s --max-count=1 2accfdb7eff65f390c4308b0e9cb7c3fe48ad63c
# make -s -j 160 ARCH=sh O=/kisskb/build/linus_allyesconfig_sh4-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-  allyesconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# < make -s -j 160 ARCH=sh O=/kisskb/build/linus_allyesconfig_sh4-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-  help
# make -s -j 160 ARCH=sh O=/kisskb/build/linus_allyesconfig_sh4-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-  olddefconfig
# make -s -j 160 ARCH=sh O=/kisskb/build/linus_allyesconfig_sh4-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-  
  Generating include/generated/machtypes.h
<stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/kisskb/src/arch/sh/kernel/cpu/sh2/../../entry-common.S: Assembler messages:
/kisskb/src/arch/sh/kernel/cpu/sh2/../../entry-common.S:85: Warning: overflow in branch to __restore_all; converted into longer instruction sequence
/kisskb/src/arch/sh/kernel/cpu/sh2/../../entry-common.S:357: Warning: overflow in branch to syscall_exit_work; converted into longer instruction sequence
/kisskb/src/arch/sh/kernel/cpu/sh2/../../entry-common.S:360: Warning: overflow in branch to syscall_exit_work; converted into longer instruction sequence
/kisskb/src/kernel/fork.c: In function '__do_sys_clone3':
/kisskb/src/kernel/fork.c:3072:2: error: #warning clone3() entry point is missing, please fix [-Werror=cpp]
 3072 | #warning clone3() entry point is missing, please fix
      |  ^~~~~~~
cc1: all warnings being treated as errors
make[4]: *** [/kisskb/src/scripts/Makefile.build:244: kernel/fork.o] Error 1
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [/kisskb/src/scripts/Makefile.build:485: kernel] Error 2
make[3]: *** Waiting for unfinished jobs....
{standard input}: Assembler messages:
{standard input}: Warning: end of file not at end of a line; newline inserted
{standard input}:1111: Error: unknown pseudo-op: `.l18'
{standard input}: Error: open CFI at the end of file; missing .cfi_endproc directive
{standard input}:1070: Error: displacement to undefined symbol .L142 overflows 8-bit field 
{standard input}:1075: Error: displacement to undefined symbol .L161 overflows 8-bit field 
{standard input}:1059: Error: pcrel too far
{standard input}:1060: Error: pcrel too far
{standard input}:1061: Error: pcrel too far
sh4-linux-gcc: internal compiler error: Segmentation fault signal terminated program cc1
Please submit a full bug report, with preprocessed source (by using -freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
make[6]: *** [/kisskb/src/scripts/Makefile.build:244: drivers/net/pcs/pcs-xpcs.o] Error 4
make[6]: *** Waiting for unfinished jobs....
make[5]: *** [/kisskb/src/scripts/Makefile.build:485: drivers/net/pcs] Error 2
make[5]: *** Waiting for unfinished jobs....
{standard input}: Assembler messages:
{standard input}: Warning: end of file not at end of a line; newline inserted
{standard input}:1273: Error: unknown pseudo-op: `.siz'
sh4-linux-gcc: internal compiler error: Segmentation fault signal terminated program cc1
Please submit a full bug report, with preprocessed source (by using -freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
make[6]: *** [/kisskb/src/scripts/Makefile.build:244: drivers/hwmon/pmbus/mp2975.o] Error 4
make[6]: *** Waiting for unfinished jobs....
make[5]: *** [/kisskb/src/scripts/Makefile.build:485: drivers/hwmon/pmbus] Error 2
make[5]: *** Waiting for unfinished jobs....
make[4]: *** [/kisskb/src/scripts/Makefile.build:485: drivers/hwmon] Error 2
make[4]: *** Waiting for unfinished jobs....
make[4]: *** [/kisskb/src/scripts/Makefile.build:485: drivers/net] Error 2
make[3]: *** [/kisskb/src/scripts/Makefile.build:485: drivers] Error 2
make[2]: *** [/kisskb/src/Makefile:1925: .] Error 2
make[1]: *** [/kisskb/src/Makefile:224: __sub-make] Error 2
make: *** [Makefile:224: __sub-make] Error 2
Command 'make -s -j 160 ARCH=sh O=/kisskb/build/linus_allyesconfig_sh4-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sh4-linux/bin/sh4-linux-  ' returned non-zero exit status 2.
# rm -rf /kisskb/build/linus_allyesconfig_sh4-gcc13
# Build took: 0:05:10.867124