# git rev-parse -q --verify 26bc672134241a080a83b2ab9aa8abede8d30e1c^{commit}
26bc672134241a080a83b2ab9aa8abede8d30e1c
already have revision, skipping fetch
# git checkout -q -f -B kisskb 26bc672134241a080a83b2ab9aa8abede8d30e1c
# git clean -qxdf
# < git log -1
# commit 26bc672134241a080a83b2ab9aa8abede8d30e1c
# Merge: 7111fa1151e3 fa729c4df558
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Nov 5 09:44:02 2019 -0800
# 
#     Merge tag 'for-linus-2019-11-05' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
#     
#     Pull clone3 stack argument update from Christian Brauner:
#      "This changes clone3() to do basic stack validation and to set up the
#       stack depending on whether or not it is growing up or down.
#     
#       With clone3() the expectation is now very simply that the .stack
#       argument points to the lowest address of the stack and that
#       .stack_size specifies the initial stack size. This is diferent from
#       legacy clone() where the "stack" argument had to point to the lowest
#       or highest address of the stack depending on the architecture.
#     
#       clone3() was released with 5.3. Currently, it is not documented and
#       very unclear to userspace how the stack and stack_size argument have
#       to be passed. After talking to glibc folks we concluded that changing
#       clone3() to determine stack direction and doing basic validation is
#       the right course of action.
#     
#       Note, this is a potentially user visible change. In the very unlikely
#       case, that it breaks someone's use-case we will revert. (And then e.g.
#       place the new behavior under an appropriate flag.)
#     
#       Note that passing an empty stack will continue working just as before.
#       Breaking someone's use-case is very unlikely. Neither glibc nor musl
#       currently expose a wrapper for clone3(). There is currently also no
#       real motivation for anyone to use clone3() directly. First, because
#       using clone{3}() with stacks requires some assembly (see glibc and
#       musl). Second, because it does not provide features that legacy
#       clone() doesn't. New features for clone3() will first happen in v5.5
#       which is why v5.4 is still a good time to try and make that change now
#       and backport it to v5.3.
#     
#       I did a codesearch on https://codesearch.debian.net, github, and
#       gitlab and could not find any software currently relying directly on
#       clone3(). I expect this to change once we land CLONE_CLEAR_SIGHAND
#       which was a request coming from glibc at which point they'll likely
#       start using it"
#     
#     * tag 'for-linus-2019-11-05' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
#       clone3: validate stack arguments
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 26bc672134241a080a83b2ab9aa8abede8d30e1c
# < make -s -j 120 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  allmodconfig
# 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
# yes \n | make -s -j 120 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 120 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
unrecognized e_machine 18 arch/sparc/vdso/vdso32/vclock_gettime.o
arch/sparc/vdso/vdso32/vclock_gettime.o: failed
make[3]: *** [/kisskb/src/scripts/Makefile.build:266: arch/sparc/vdso/vdso32/vclock_gettime.o] Error 1
make[3]: *** Deleting file 'arch/sparc/vdso/vdso32/vclock_gettime.o'
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:509: arch/sparc/vdso] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1649: arch/sparc] Error 2
make[1]: *** Waiting for unfinished jobs....
/kisskb/src/fs/cifs/smb2pdu.c: In function 'SMB2_ioctl_init':
/kisskb/src/fs/cifs/smb2pdu.c:2700:19: warning: 'in_data_buf' may be used uninitialized in this function [-Wmaybe-uninitialized]
   iov[1].iov_base = in_data_buf;
                   ^
/kisskb/src/drivers/input/joystick/analog.c:160:2: warning: #warning Precise timer not defined for this architecture. [-Wcpp]
 #warning Precise timer not defined for this architecture.
  ^
In file included from /kisskb/src/include/linux/wait.h:9:0,
                 from /kisskb/src/include/linux/net.h:19,
                 from /kisskb/src/drivers/infiniband/sw/siw/siw_qp_rx.c:8:
/kisskb/src/drivers/infiniband/sw/siw/siw_qp_rx.c: In function 'siw_proc_send':
/kisskb/src/include/linux/spinlock.h:288:3: warning: 'flags' may be used uninitialized in this function [-Wmaybe-uninitialized]
   _raw_spin_unlock_irqrestore(lock, flags); \
   ^
/kisskb/src/drivers/infiniband/sw/siw/siw_qp_rx.c:335:16: note: 'flags' was declared here
  unsigned long flags;
                ^
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c: In function 'sh_mobile_i2c_isr':
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:399:26: warning: 'data' may be used uninitialized in this function [-Wmaybe-uninitialized]
   pd->msg->buf[real_pos] = data;
                          ^
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:372:16: note: 'data' was declared here
  unsigned char data;
                ^
In file included from /kisskb/src/include/linux/rwsem.h:16:0,
                 from /kisskb/src/include/linux/notifier.h:15,
                 from /kisskb/src/include/linux/clk.h:14,
                 from /kisskb/src/drivers/tty/serial/sh-sci.c:24:
/kisskb/src/drivers/tty/serial/sh-sci.c: In function 'sci_dma_rx_submit':
/kisskb/src/include/linux/spinlock.h:288:3: warning: 'flags' may be used uninitialized in this function [-Wmaybe-uninitialized]
   _raw_spin_unlock_irqrestore(lock, flags); \
   ^
/kisskb/src/drivers/tty/serial/sh-sci.c:1351:16: note: 'flags' was declared here
  unsigned long flags;
                ^
/kisskb/src/drivers/watchdog/cpwd.c:500:19: error: 'compat_ptr_ioctl' undeclared here (not in a function)
  .compat_ioctl =  compat_ptr_ioctl,
                   ^
make[3]: *** [/kisskb/src/scripts/Makefile.build:266: drivers/watchdog/cpwd.o] Error 1
make[2]: *** [/kisskb/src/scripts/Makefile.build:509: drivers/watchdog] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1649: drivers] Error 2
make: *** [Makefile:179: sub-make] Error 2
Command 'make -s -j 120 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_sparc64-allmodconfig_sparc64
# Build took: 0:06:22.667669