2:17 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git
20210427-sysfs-fix-races-v4
head: 177cab73f0f242ce77398095d9c54d76d7fa46df
commit: 177cab73f0f242ce77398095d9c54d76d7fa46df [3/3] drivers/base/core: refcount kobject
and bus on device attribute read / store
config: powerpc-randconfig-r002-20210618 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
64720f57bea6a6bf033feef4a5751ab9c0c3b401)
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 powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
#
https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git/com...
git remote add mcgrof-next
https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git
git fetch --no-tags mcgrof-next 20210427-sysfs-fix-races-v4
git checkout 177cab73f0f242ce77398095d9c54d76d7fa46df
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
In file included from drivers/base/bus.c:11:
In file included from include/linux/async.h:12:
In file included from include/linux/list.h:9:
In file included from include/linux/kernel.h:12:
In file included from include/linux/bitops.h:32:
In file included from arch/powerpc/include/asm/bitops.h:62:
arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined
[-Wmacro-redefined]
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : :
:"memory")
^
<built-in>:309:9: note: previous definition is here
#define __lwsync __builtin_ppc_lwsync
^
> drivers/base/bus.c:42:18: warning: no previous prototype for
function 'bus_get' [-Wmissing-prototypes]
struct bus_type *bus_get(struct
bus_type *bus)
^
drivers/base/bus.c:42:1: note: declare 'static' if the function is not intended
to be used outside of this translation unit
struct bus_type *bus_get(struct bus_type *bus)
^
static
> drivers/base/bus.c:51:6: warning: no previous prototype for
function 'bus_put' [-Wmissing-prototypes]
void bus_put(struct bus_type
*bus)
^
drivers/base/bus.c:51:1: note: declare 'static' if the function is not intended
to be used outside of this translation unit
void bus_put(struct bus_type *bus)
^
static
3 warnings generated.
vim +/bus_get +42 drivers/base/bus.c
34
35 #define DRIVER_ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) \
36 struct driver_attribute driver_attr_##_name = \
37 __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store)
38
39 static int __must_check bus_rescan_devices_helper(struct device *dev,
40 void *data);
41
42 struct bus_type *bus_get(struct bus_type *bus)
43 {
44 if (bus) {
45 kset_get(&bus->p->subsys);
46 return bus;
47 }
48 return NULL;
49 }
50
51 void bus_put(struct bus_type *bus)
52 {
53 if (bus)
54 kset_put(&bus->p->subsys);
55 }
56
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org