[PATCH 0/3] Resolve -Wattribute-alias warnings from SYSCALL_DEFINEx()

[Paul Burton <paul.burton@mips.com>]

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(-)

-- 
2.17.1