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SubjectRe: [PATCH] mm/sparse: only sub-section aligned range would be populated
On Wed, Jul 8, 2020 at 12:23 AM Xia, Hui <hui.xia@intel.com> wrote:
>
>
>
> >-----Original Message-----
> >From: Wei Yang <richard.weiyang@linux.alibaba.com>
> >Sent: 2020年7月1日 19:58
> >To: lkp <lkp@intel.com>
> >Cc: Wei Yang <richard.weiyang@linux.alibaba.com>; Williams, Dan J
> ><dan.j.williams@intel.com>; akpm@linux-foundation.org; kbuild-all@lists.01.org;
> >clang-built-linux@googlegroups.com; linux-mm@kvack.org; linux-
> >kernel@vger.kernel.org
> >Subject: Re: [PATCH] mm/sparse: only sub-section aligned range would be
> >populated
> >
> >On Wed, Jul 01, 2020 at 02:11:10AM +0800, kernel test robot wrote:
> >>Hi Wei,
> >>
> >>Thank you for the patch! Perhaps something to improve:
> >>
> >>[auto build test WARNING on mmotm/master]
> >>
> >>url: https://github.com/0day-ci/linux/commits/Wei-Yang/mm-sparse-only-
> >sub-section-aligned-range-would-be-populated/20200630-101713
> >>base: git://git.cmpxchg.org/linux-mmotm.git master
> >>config: x86_64-allnoconfig (attached as .config)

Another issue was that this was an allnoconfig x86_64 build with
Clang. While ARCH=x86_64 defconfigs set:
CONFIG_64BIT=y
CONFIG_X86_64=y

allnoconfig turns those off, making it a 32b x86 build. We cannot yet
build an ARCH=i386 build yet with Clang, so that means this target is
not green to begin with.

+ Arnd
There might be a way for us to disable maybe CONFIG_X86_32 when
building with Clang? or make it so that randconfig can't dig this up?

+Philip
I'm not sure if it's easy to disable `allnoconfig` x86 builds with
Clang? Also, I feel like we're asking for a bunch of special cases
while we work through all the issues. We would like to revert these
special cases once we're in better shape. Are you tracking a list of
exceptions, so that we can estimate the work to fix on our side, and
that we know to re-enable test coverage once fixed?

> >>compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project
> >>cf1d04484344be52ada8178e41d18fd15a9b880c)
> >>reproduce (this is a W=1 build):
> >> wget https://raw.githubusercontent.com/intel/lkp-
> >tests/master/sbin/make.cross -O ~/bin/make.cross
> >> chmod +x ~/bin/make.cross
> >> # install x86_64 cross compiling tool for clang build
> >> # apt-get install binutils-x86-64-linux-gnu
> >> # save the attached .config to linux build tree
> >> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross
> >>ARCH=x86_64
> >>
> >>If you fix the issue, kindly add following tag as appropriate
> >>Reported-by: kernel test robot <lkp@intel.com>
> >>
> >
> >Sorry, I don't follow up with this error report.
> >
> >It looks like a build error, while I just removes some check and the build pass from
> >my side. Confused with this error report.
> It is false positive. Please ignore. Sorry for inconvenience.
> The report complains about " warning: no previous prototype for function 'devkmsg_sysctl_set_loglvl'" which is not caused by commit in this report. We will investigate and fix in 0-day side.
>
> >
> >>All warnings (new ones prefixed by >>):
> >>
> >> include/linux/signal.h:137:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 1: ^
> >> include/linux/signal.h:177:1: warning: unannotated fall-through between
> >switch labels
> >> _SIG_SET_OP(signotset, _sig_not)
> >> ^
> >> include/linux/signal.h:167:2: note: expanded from macro '_SIG_SET_OP'
> >> case 2: = ^
> >> include/linux/signal.h:177:1: warning: unannotated fall-through between
> >switch labels
> >> include/linux/signal.h:169:2: note: expanded from macro '_SIG_SET_OP'
> >> case 1: = ^
> >> include/linux/signal.h:190:2: warning: unannotated fall-through between
> >switch labels
> >> case 1: = 0;
> >> ^
> >> include/linux/jhash.h:95:2: note: insert '__attribute__((fallthrough));' to silence
> >this warning
> >> case 6: b += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/jhash.h:95:2: note: insert 'break;' to avoid fall-through
> >> case 6: b += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> break;
> >> include/linux/jhash.h:96:2: warning: unannotated fall-through between switch
> >labels
> >> case 5: b += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> 15include/linux/signal.h:190:2: note: insert '__attribute__((fallthrough));' to
> >silence this warning
> >> case 1: = 0;
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/signal.h:190:2: note: insert 'break;' to avoid fall-through
> >> case 1: = 0;
> >> ^
> >> break;
> >> include/linux/signal.h:203:2: warninginclude/linux/jhash.h:96:2: note: insert
> >'__attribute__((fallthrough));' to silence this warning
> >> case 5: b += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/jhash.h:96:2: note: insert 'break;' to avoid fall-through
> >> case 5: b += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> break;
> >> include/linux/jhash.h:97:2: warning: unannotated fall-through between switch
> >labels
> >> case 4: a += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> : unannotated fall-through between switch labels
> >> case 1: = -1;
> >> ^
> >> warnings generated.
> >> include/linux/signal.h:203:2: note: insert '__attribute__((fallthrough));' to
> >silence this warning
> >> case 1: = -1;
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/signal.h:15203:2: note: insert 'break;' to avoid fall-through
> >> case 1: = -1;
> >> ^
> >> break;
> >> include/linux/jhash.h:97:2: note: insert '__attribute__((fallthrough));' to silence
> >this warning
> >> case 4: a += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/jhash.h:97:2: note: insert 'break;' to avoid fall-through
> >> case 4: a += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> break;
> >> include/linux/jhash.h:98:2: warning: unannotated fall-through between switch
> >labels
> >> case 3: a += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> include/linux/signal.h:233:2: warning: unannotated fall-through between
> >switch labels
> >> case 1: ;
> >> ^
> >> warnings generated.
> >> In file included from kernel/printk/printk.c:61:
> >> kernel/printk/internal.h:54:20: warninginclude/linux/jhash.h:98:2: note: insert
> >'__attribute__((fallthrough));' to silence this warning
> >> case 3: a += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/jhash.h:98:2: note: no previous prototype for function
> >'vprintk_func'
> >> __printf(1, 0) int vprintk_func(const char va_list args) { return 0; }
> >> ^
> >> kernel/printk/internal.h: insert 'break;' to avoid fall-through
> >> case 3: a += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> break;
> >> include/linux/jhash.h:99:2: warning: unannotated fall-through between switch
> >labels
> >> case 2: a += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> :54:16: note: declare 'static' if the function is not intended to be used outside
> >of this translation unit
> >> __printf(1, 0) int vprintk_func(const char va_list args) { return 0; }
> >> ^
> >> static
> >> kernel/printk/printk.cinclude/linux/signal.h:233:2: note: insert
> >'__attribute__((fallthrough));' to silence this warning
> >> case 1: ;
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/signal.h:233:2: note: insert 'break;' to avoid fall-through
> >> case 1: ;
> >> ^
> >> break;
> >> include/linux/signal.h:245:2: warning: unannotated fall-through between
> >switch labels
> >> case 1: ;
> >> ^
> >>>> :165:5: warning: no previous prototype for function
> >'devkmsg_sysctl_set_loglvl'
> >> int devkmsg_sysctl_set_loglvl(struct ctl_table int write,
> >> ^
> >> kernel/printk/printk.c:165:1: note: declare 'static' if the function is not
> >intended to be used outside of this translation unit
> >> int devkmsg_sysctl_set_loglvl(struct ctl_table int write,
> >> ^
> >> static
> >> include/linux/jhash.h:99:2: note: insert '__attribute__((fallthrough));' to silence
> >this warning
> >> case 2: a += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/jhash.h:99:2: note: insert 'break;' to avoid fall-through
> >> case 2: a += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> break;
> >> include/linux/jhash.h:100:2: warning: unannotated fall-through between
> >switch labels
> >> case 1: a +=
> >> ^
> >> include/linux/signal.h:245:2: note: insert '__attribute__((fallthrough));' to
> >silence this warning
> >> case 1: ;
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/signal.h:245:2: note: insert 'break;' to avoid fall-through
> >> case 1: ;
> >> ^
> >> break;
> >> kernel/printk/printk.cinclude/linux/jhash.h:100:2: note: insert
> >'__attribute__((fallthrough));' to silence this warning
> >> case 1: a +=
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/jhash.h:100:2: note: insert 'break;' to avoid fall-through
> >> case 1: a +=
> >> ^
> >> break;
> >> include/linux/jhash.h:102:2: warning: unannotated fall-through between
> >switch labels
> >> case 0: /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var Nothing left to add arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/
> >kernel/ lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> include/linux/jhash.h:102:2: note: insert 'break;' to avoid fall-through
> >> case 0: /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var Nothing left to add arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/
> >kernel/ lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> break;
> >> :2406:10: warning: 'sprintf' will always overflow; destination buffer has size 0,
> >but format string expands to at least 33
> >> len = sprintf(text,
> >> ^
> >> include/linux/jhash.h:136:2: warning: unannotated fall-through between
> >switch labels
> >> case 2: b += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> include/linux/jhash.h:136:2: note: insert '__attribute__((fallthrough));' to
> >silence this warning
> >> case 2: b += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/jhash.h:136:2: note: insert 'break;' to avoid fall-through
> >> case 2: b += /Dockerfile /Gemfile /Gemfile.lock /bin /boot /c /cephfs /dev /etc
> >/home /htmldocs /include /kbuild /lib /lib32 /lib64 /libx32 /lkp-cloud /lkp-src
> >/media /mnt /opt /patch /pkg /proc /root /run /sbin /share /srv /sys /tmp /usr
> >/var fall through arch/ block/ certs/ crypto/ drivers/ fs/ include/ init/ ipc/ kernel/
> >lib/ mm/ net/ scripts/ security/ sound/ source/ tools/ usr/ virt/
> >> ^
> >> break;
> >> include/linux/jhash.h:137:2: warning: unannotated fall-through between
> >switch labels
> >> case 1: a +=
> >> ^
> >> In file included from kernel/capability.c:13:
> >> In file included from include/linux/audit.h:13:
> >> In file included from include/linux/ptrace.h:7:
> >> In file included from include/linux/sched/signal.h:6:
> >> include/linux/signal.h:147:1: warning: unannotated fall-through between
> >switch labels
> >> _SIG_SET_BINOP(sigorsets, _sig_or)
> >> ^
> >> include/linux/signal.h:133:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 2: ^
> >> include/linux/signal.h:147:1: warning: unannotated fall-through between
> >switch labels
> >> include/linux/signal.h:137:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 1: ^
> >> include/linux/signal.h:150:1: warning: unannotated fall-through between
> >switch labels
> >> _SIG_SET_BINOP(sigandsets, _sig_and)
> >> ^
> >> include/linux/signal.h:133:2:In file included from note: expanded from macro
> >'_SIG_SET_BINOP'
> >> case 2: ^
> >> include/linux/signal.h:150:1: warning: unannotated fall-through between
> >switch labels
> >> include/linux/signal.h:137:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 1: ^
> >> include/linux/signal.h:153:1: warning: unannotated fall-through between
> >switch labels
> >> _SIG_SET_BINOP(sigandnsets, _sig_andn)
> >> ^
> >> include/linux/signal.h:133:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 2: kernel/sysctl_binary.c:15:
> >> In file included from include/linux/netdevice.h:37:
> >> In file included from include/linux/ethtool.h:18:
> >> In file included from include/uapi/linux/ethtool.h:19:
> >> In file included from include/linux/if_ether.h:19:
> >> include/linux/skbuff.h:3690:2: warning: unannotated fall-through between
> >switch labels
> >> case 24: diffs |= __it_diff(a, b, 64);
> >> ^
> >>--
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/mm.h:166:2: note: insert 'break;' to avoid fall-through
> >> case 56:
> >> ^
> >> break;
> >> In file included from kernel/printk/printk.c:36:
> >> In file included from include/linux/syscalls.h:76:
> >> include/linux/signal.h:147:1: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> _SIG_SET_BINOP(sigorsets, _sig_or)
> >> ^
> >> include/linux/signal.h:133:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 2: \
> >> ^
> >> include/linux/signal.h:147:1: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> include/linux/signal.h:137:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 1: \
> >> ^
> >> include/linux/signal.h:150:1: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> _SIG_SET_BINOP(sigandsets, _sig_and)
> >> ^
> >> include/linux/signal.h:133:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 2: \
> >> ^
> >> include/linux/signal.h:150:1: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> include/linux/signal.h:137:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 1: \
> >> ^
> >> include/linux/signal.h:153:1: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> _SIG_SET_BINOP(sigandnsets, _sig_andn)
> >> ^
> >> include/linux/signal.h:133:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 2: \
> >> ^
> >> include/linux/signal.h:153:1: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> include/linux/signal.h:137:2: note: expanded from macro '_SIG_SET_BINOP'
> >> case 1: \
> >> ^
> >> include/linux/signal.h:177:1: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> _SIG_SET_OP(signotset, _sig_not)
> >> ^
> >> include/linux/signal.h:167:2: note: expanded from macro '_SIG_SET_OP'
> >> case 2: set->sig[1] = op(set->sig[1]); \
> >> ^
> >> include/linux/signal.h:177:1: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> include/linux/signal.h:169:2: note: expanded from macro '_SIG_SET_OP'
> >> case 1: set->sig[0] = op(set->sig[0]); \
> >> ^
> >> include/linux/signal.h:190:2: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> case 1: set->sig[0] = 0;
> >> ^
> >> include/linux/signal.h:190:2: note: insert '__attribute__((fallthrough));' to
> >silence this warning
> >> case 1: set->sig[0] = 0;
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/signal.h:190:2: note: insert 'break;' to avoid fall-through
> >> case 1: set->sig[0] = 0;
> >> ^
> >> break;
> >> include/linux/signal.h:203:2: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> case 1: set->sig[0] = -1;
> >> ^
> >> include/linux/signal.h:203:2: note: insert '__attribute__((fallthrough));' to
> >silence this warning
> >> case 1: set->sig[0] = -1;
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/signal.h:203:2: note: insert 'break;' to avoid fall-through
> >> case 1: set->sig[0] = -1;
> >> ^
> >> break;
> >> include/linux/signal.h:233:2: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> case 1: ;
> >> ^
> >> include/linux/signal.h:233:2: note: insert '__attribute__((fallthrough));' to
> >silence this warning
> >> case 1: ;
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/signal.h:233:2: note: insert 'break;' to avoid fall-through
> >> case 1: ;
> >> ^
> >> break;
> >> include/linux/signal.h:245:2: warning: unannotated fall-through between
> >switch labels [-Wimplicit-fallthrough]
> >> case 1: ;
> >> ^
> >> include/linux/signal.h:245:2: note: insert '__attribute__((fallthrough));' to
> >silence this warning
> >> case 1: ;
> >> ^
> >> __attribute__((fallthrough));
> >> include/linux/signal.h:245:2: note: insert 'break;' to avoid fall-through
> >> case 1: ;
> >> ^
> >> break;
> >> In file included from kernel/printk/printk.c:61:
> >> kernel/printk/internal.h:54:20: warning: no previous prototype for function
> >'vprintk_func' [-Wmissing-prototypes]
> >> __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; }
> >> ^
> >> kernel/printk/internal.h:54:16: note: declare 'static' if the function is not
> >intended to be used outside of this translation unit
> >> __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; }
> >> ^
> >> static
> >>>> kernel/printk/printk.c:165:5: warning: no previous prototype for
> >>>> function 'devkmsg_sysctl_set_loglvl' [-Wmissing-prototypes]
> >> int devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write,
> >> ^
> >> kernel/printk/printk.c:165:1: note: declare 'static' if the function is not
> >intended to be used outside of this translation unit
> >> int devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write,
> >> ^
> >> static
> >> kernel/printk/printk.c:2406:10: warning: 'sprintf' will always overflow;
> >destination buffer has size 0, but format string expands to at least 33 [-Wfortify-
> >source]
> >> len = sprintf(text,
> >> ^
> >> 18 warnings generated.
> >>
> >>---
> >>0-DAY CI Kernel Test Service, Intel Corporation
> >>https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
> >
> >
> >
> >--
> >Wei Yang
> >Help you, Help me
>
> --
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--
Thanks,
~Nick Desaulniers

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