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

From: Paul Burton
Date: Fri Jun 15 2018 - 20:55:25 EST

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


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(-)