On Tue, Mar 15, 2016 at 12:21:06AM +0100, Arnd Bergmann wrote: > When all subsystems are disabled, gcc notices that cgroup_subsys_enabled_key > is a zero-length array and that any access to it must be out of bounds: > > In file included from ../include/linux/cgroup.h:19:0, > from ../kernel/cgroup.c:31: > ../kernel/cgroup.c: In function 'cgroup_add_cftypes': > ../kernel/cgroup.c:261:53: error: array subscript is above array bounds > [-Werror=array-bounds] > return static_key_enabled(cgroup_subsys_enabled_key[ssid]); > ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~ > ../include/linux/jump_label.h:271:40: note: in definition of macro > 'static_key_enabled' > static_key_count((struct static_key *)x) > 0; \ > ^ > > We should never call the function in this particular case, so this is > not a bug. In order to silence the warning, this adds an explicit check > for the CGROUP_SUBSYS_COUNT==0 case. > > Signed-off-by: Arnd Bergmann <[email protected]>
Applied to cgroup/for-4.6. Thanks. -- tejun
