On Fri, Jun 15, 2018 at 05:53:19PM -0700, Paul Burton wrote:

This series introduces infrastructure allowing compiler diagnostics to
be disabled or their severity modified for specific pieces of code, with
suitable abstractions to prevent that code from becoming tied to a
specific compiler.

This infrastructure is then used to disable the -Wattribute-alias
warning around syscall definitions, which rely on type mismatches to
sanitize arguments.

Finally PowerPC-specific #pragma's are removed now that the generic code
is handling this.

The series takes Arnd's RFC patches & addresses the review comments they
received. The most notable effect of this series to to avoid warnings &
build failures caused by -Wattribute-alias when compiling the kernel
with GCC 8.

Applies cleanly atop master as of 9215310cf13b ("Merge
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net").

Thanks,
    Paul

Arnd Bergmann (2):
  kbuild: add macro for controlling warnings to linux/compiler.h
  disable -Wattribute-alias warning for SYSCALL_DEFINEx()

Paul Burton (1):
  Revert "powerpc: fix build failure by disabling attribute-alias
    warning in pci_32"

 arch/powerpc/kernel/pci_32.c   |  4 ---
 include/linux/compat.h         |  8 ++++-
 include/linux/compiler-gcc.h   | 66 ++++++++++++++++++++++++++++++++++
 include/linux/compiler_types.h | 18 ++++++++++
 include/linux/syscalls.h       |  4 +++
 5 files changed, 95 insertions(+), 5 deletions(-)

Hello Paul,

I tested the series out with the new OpenRISC 9.0.0 port and the
-Wattribute-alias warnings are gone.  Thank you.

Using toolchain binaries from:
  https://github.com/stffrdhrn/gcc/releases/tag/or1k-9.0.0-20180613

For the series:

Tested-by: Stafford Horne <shorne@gmail.com>

-Stafford