# git rev-parse -q --verify 459e3a21535ae3c7a9a123650e54f5c882b8fcbf^{commit}
459e3a21535ae3c7a9a123650e54f5c882b8fcbf
already have revision, skipping fetch
# git checkout -q -f -B kisskb 459e3a21535ae3c7a9a123650e54f5c882b8fcbf
# git clean -qxdf
# < git log -1
# commit 459e3a21535ae3c7a9a123650e54f5c882b8fcbf
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed May 1 11:20:53 2019 -0700
# 
#     gcc-9: properly declare the {pv,hv}clock_page storage
#     
#     The pvlock_page and hvclock_page variables are (as the name implies)
#     addresses to pages, created by the linker script.
#     
#     But we declared them as just "extern u8" variables, which _works_, but
#     now that gcc does some more bounds checking, it causes warnings like
#     
#         warning: array subscript 1 is outside array bounds of ‘u8[1]’
#     
#     when we then access more than one byte from those variables.
#     
#     Fix this by simply making the declaration of the variables match
#     reality, which makes the compiler happy too.
#     
#     Signed-off-by: Linus Torvalds <torvalds@-linux-foundation.org>
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 459e3a21535ae3c7a9a123650e54f5c882b8fcbf
# < make -s -j 80 ARCH=um O=/kisskb/build/linus_um-allyesconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 allyesconfig
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_KCOV=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n
# Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n
# Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n
# Added to kconfig CONFIG_GCC_PLUGIN_STRUCTLEAK=n
# Added to kconfig CONFIG_GCC_PLUGIN_RANDSTRUCT=n
# Added to kconfig CONFIG_UML_NET=n
# Added to kconfig CONFIG_UML_NET_ETHERTAP=n
# Added to kconfig CONFIG_UML_NET_TUNTAP=n
# Added to kconfig CONFIG_UML_NET_SLIP=n
# Added to kconfig CONFIG_UML_NET_DAEMON=n
# Added to kconfig CONFIG_UML_NET_VDE=n
# Added to kconfig CONFIG_UML_NET_MCAST=n
# Added to kconfig CONFIG_UML_NET_PCAP=n
# Added to kconfig CONFIG_UML_NET_SLIRP=n
# Added to kconfig CONFIG_GCOV_KERNEL=n
# yes \n | make -s -j 80 ARCH=um O=/kisskb/build/linus_um-allyesconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 oldconfig
yes: standard output: Broken pipe
# make -s -j 80 ARCH=um O=/kisskb/build/linus_um-allyesconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 
/kisskb/src/arch/um/kernel/skas/uaccess.c: In function 'do_op_one_page':
/kisskb/src/arch/um/kernel/skas/uaccess.c:62:10: warning: unused variable 'buf' [-Wunused-variable]
  jmp_buf buf;
          ^
/kisskb/src/arch/um/os-Linux/umid.c: In function 'is_umdir_used':
/kisskb/src/arch/um/os-Linux/umid.c:138:2: warning: ISO C90 forbids variable length array 'file' [-Wvla]
  char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
  ^
/kisskb/src/arch/um/os-Linux/umid.c: In function 'create_pid_file':
/kisskb/src/arch/um/os-Linux/umid.c:213:2: warning: ISO C90 forbids variable length array 'file' [-Wvla]
  char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
  ^
/kisskb/src/arch/um/os-Linux/umid.c: In function 'remove_umid_dir':
/kisskb/src/arch/um/os-Linux/umid.c:388:2: warning: ISO C90 forbids variable length array 'dir' [-Wvla]
  char dir[strlen(uml_dir) + UMID_LEN + 1], err;
  ^
/kisskb/src/security/apparmor/policy_unpack.c: In function 'unpack_trans_table':
/kisskb/src/security/apparmor/policy_unpack.c:496:9: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
      str[pos] = ':';
         ^
/kisskb/src/mm/mprotect.c: In function 'change_pte_range':
/kisskb/src/mm/mprotect.c:42:20: warning: unused variable 'mm' [-Wunused-variable]
  struct mm_struct *mm = vma->vm_mm;
                    ^
/kisskb/src/lib/lz4/lz4hc_compress.c: In function 'LZ4HC_compress_generic':
/kisskb/src/lib/lz4/lz4hc_compress.c:579:1: warning: the frame size of 2144 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^
  LINK linux
Completed OK
# rm -rf /kisskb/build/linus_um-allyesconfig_um-x86_64
# Build took: 0:05:52.501585