kernel_optimize_test/arch
Maciej W. Rozycki 94cc36b84a MIPS: VDSO: Build with `-fno-strict-aliasing'
Avoid an aliasing issue causing a build error in VDSO:

In file included from include/linux/srcu.h:34:0,
                 from include/linux/notifier.h:15,
                 from ./arch/mips/include/asm/uprobes.h:9,
                 from include/linux/uprobes.h:61,
                 from include/linux/mm_types.h:13,
                 from ./arch/mips/include/asm/vdso.h:14,
                 from arch/mips/vdso/vdso.h:27,
                 from arch/mips/vdso/gettimeofday.c:11:
include/linux/workqueue.h: In function 'work_static':
include/linux/workqueue.h:186:2: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing]
  return *work_data_bits(work) & WORK_STRUCT_STATIC;
  ^
cc1: all warnings being treated as errors
make[2]: *** [arch/mips/vdso/gettimeofday.o] Error 1

with a CONFIG_DEBUG_OBJECTS_WORK configuration and GCC 5.2.0.  Include
`-fno-strict-aliasing' along with compiler options used, as required for
kernel code, fixing a problem present since the introduction of VDSO
with commit ebb5e78cc6 ("MIPS: Initial implementation of a VDSO").

Thanks to Tejun for diagnosing this properly!

Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Fixes: ebb5e78cc6 ("MIPS: Initial implementation of a VDSO")
Cc: Tejun Heo <tj@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # v4.3+
Patchwork: https://patchwork.linux-mips.org/patch/13357/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-05-28 12:35:12 +02:00
..
alpha
arc
arm Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm 2016-05-07 08:27:35 -07:00
arm64
avr32
blackfin
c6x
cris
frv
h8300
hexagon
ia64
m32r
m68k
metag
microblaze
mips MIPS: VDSO: Build with `-fno-strict-aliasing' 2016-05-28 12:35:12 +02:00
mn10300
nios2
openrisc
parisc parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls 2016-05-06 15:09:07 +02:00
powerpc powerpc fixes for 4.6 #4 2016-05-06 11:05:07 -07:00
s390
score
sh
sparc
tile
um
unicore32
x86 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-05-06 12:59:27 -07:00
xtensa
.gitignore
Kconfig