lkml.org 
[lkml]   [2020]   [Apr]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v4 00/11] Rework READ_ONCE() to improve codegen
Date
Hi,

It's me again. This is version four of the READ_ONCE() codegen improvement
patches that I previously posted here:

RFC: https://lore.kernel.org/lkml/20200110165636.28035-1-will@kernel.org
v2: https://lore.kernel.org/lkml/20200123153341.19947-1-will@kernel.org
v3: https://lore.kernel.org/lkml/20200415165218.20251-1-will@kernel.org/

Changes since v3 include:

* Drop the patch warning for GCC versions prior to 4.8
* Move the patch raising the minimum GCC version earlier in the series
* Reintroduce the old READ_ONCE_NOCHECK behaviour so that it can continue
to be used by stack unwinders

As before, this will break the build for sparc32 without the changes here:

https://lore.kernel.org/lkml/20200414214011.2699-1-will@kernel.org

and boy are they proving to be popular (I'm interpreting the silence as
monumental joy).

Ta,

Will

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>

--->8

Will Deacon (11):
compiler/gcc: Raise minimum GCC version for kernel builds to 4.8
netfilter: Avoid assigning 'const' pointer to non-const pointer
net: tls: Avoid assigning 'const' pointer to non-const pointer
fault_inject: Don't rely on "return value" from WRITE_ONCE()
arm64: csum: Disable KASAN for do_csum()
READ_ONCE: Simplify implementations of {READ,WRITE}_ONCE()
READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses
READ_ONCE: Drop pointer qualifiers when reading from scalar types
locking/barriers: Use '__unqual_scalar_typeof' for load-acquire macros
arm64: barrier: Use '__unqual_scalar_typeof' for acquire/release
macros
gcov: Remove old GCC 3.4 support

Documentation/process/changes.rst | 2 +-
arch/arm/crypto/Kconfig | 12 +-
arch/arm64/include/asm/barrier.h | 16 +-
arch/arm64/lib/csum.c | 20 +-
crypto/Kconfig | 1 -
drivers/xen/time.c | 2 +-
include/asm-generic/barrier.h | 16 +-
include/linux/compiler-gcc.h | 5 +-
include/linux/compiler.h | 145 ++++----
include/linux/compiler_types.h | 21 ++
init/Kconfig | 1 -
kernel/gcov/Kconfig | 24 --
kernel/gcov/Makefile | 3 +-
kernel/gcov/gcc_3_4.c | 573 ------------------------------
lib/fault-inject.c | 4 +-
net/netfilter/core.c | 2 +-
net/tls/tls_main.c | 2 +-
scripts/gcc-plugins/Kconfig | 2 +-
18 files changed, 132 insertions(+), 719 deletions(-)
delete mode 100644 kernel/gcov/gcc_3_4.c

--
2.26.1.301.g55bc3eb7cb9-goog

\
 
 \ /
  Last update: 2020-04-21 17:16    [W:0.188 / U:0.388 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site