On 08.05.20 11:35, Arnd Bergmann wrote: > An experimental patch series of mine reworks how warnings are processed > in Kbuild. A side effect is a new warning about a harmless aliasing > rule violation in an inline function: > > In file included from > include/linux/rhashtable-types.h:15:0, > from include/linux/ipc.h:7, > from include/uapi/linux/sem.h:5, > from include/linux/sem.h:5, > from include/linux/sched.h:15, > from include/linux/uaccess.h:6, > from arch/parisc/boot/compressed/misc.c:7: > include/linux/workqueue.h: In function 'work_static': > include/linux/workqueue.h:212:2: warning: dereferencing > type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] > return *work_data_bits(work) & WORK_STRUCT_STATIC; > > Make the decompressor use -fno-strict-aliasing like the rest of > the kernel for consistency, and to ensure this warning never makes > it into a release. > > Reported-by: kbuild test robot <lkp@xxxxxxxxx> > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Acked-by: Helge Deller <deller@xxxxxx> Arnd, will you take it through your trees when you push your experimental patches, or do you want me to take it through the parisc tree? Helge > --- > arch/parisc/boot/compressed/Makefile | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/parisc/boot/compressed/Makefile b/arch/parisc/boot/compressed/Makefile > index 1e5879c6a752..dff453687530 100644 > --- a/arch/parisc/boot/compressed/Makefile > +++ b/arch/parisc/boot/compressed/Makefile > @@ -16,6 +16,7 @@ targets += real2.S firmware.c > > KBUILD_CFLAGS := -D__KERNEL__ -O2 -DBOOTLOADER > KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING > +KBUILD_CFLAGS += -fno-strict-aliasing > KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks -fno-builtin-printf > KBUILD_CFLAGS += -fno-PIE -mno-space-regs -mdisable-fpregs -Os > ifndef CONFIG_64BIT >
