From: Will Deacon <will@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org, kernel-team@android.com,
Will Deacon <will@kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Peter Zijlstra <peterz@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Segher Boessenkool <segher@kernel.crashing.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Luc Van Oostenryck <luc.vanoostenryck@gmail.com>,
Arnd Bergmann <arnd@arndb.de>,
Peter Oberparleiter <oberpar@linux.ibm.com>,
Masahiro Yamada <masahiroy@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>
Subject: [PATCH v3 00/12] Rework READ_ONCE() to improve codegen
Date: Wed, 15 Apr 2020 17:52:06 +0100 [thread overview]
Message-ID: <20200415165218.20251-1-will@kernel.org> (raw)
Hi everyone,
This is version three of the patches I previously posted for improving
the code generation of READ_ONCE() and moving the minimum GCC version
to 4.8:
RFC: https://lore.kernel.org/lkml/20200110165636.28035-1-will@kernel.org
v2: https://lore.kernel.org/lkml/20200123153341.19947-1-will@kernel.org
Although v2 was queued up by Peter in -tip, it was found to break the
build for m68k and sparc32. We fixed m68k during the merge window and
I've since posted patches to fix sparc32 here:
https://lore.kernel.org/lkml/20200414214011.2699-1-will@kernel.org
This series is a refresh on top of 5.7-rc1, the main changes being:
* Fix another issue where 'const' is assigned to non-const via
WRITE_ONCE(), this time in the tls code
* Fix READ_ONCE_NOCHECK() abuse in arm64 checksum code
* Added Reviewed-bys and Acks from v2
Hopefully this can be considered for 5.8, along with the sparc32 changes.
Cheers,
Will
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 (12):
compiler/gcc: Emit build-time warning for GCC prior to version 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
compiler/gcc: Raise minimum GCC version for kernel builds to 4.8
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 | 129 +++----
include/linux/compiler_types.h | 21 ++
init/Kconfig | 5 +-
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/Kconfig.include | 6 +
scripts/gcc-plugins/Kconfig | 2 +-
19 files changed, 126 insertions(+), 719 deletions(-)
delete mode 100644 kernel/gcov/gcc_3_4.c
--
2.26.0.110.g2183baf09c-goog
next reply other threads:[~2020-04-15 16:52 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-15 16:52 Will Deacon [this message]
2020-04-15 16:52 ` [PATCH v3 01/12] compiler/gcc: Emit build-time warning for GCC prior to version 4.8 Will Deacon
2020-04-15 17:20 ` Masahiro Yamada
2020-04-15 16:52 ` [PATCH v3 02/12] netfilter: Avoid assigning 'const' pointer to non-const pointer Will Deacon
2020-04-15 16:52 ` [PATCH v3 03/12] net: tls: " Will Deacon
2020-04-15 16:52 ` [PATCH v3 04/12] fault_inject: Don't rely on "return value" from WRITE_ONCE() Will Deacon
2020-04-15 16:52 ` [PATCH v3 05/12] arm64: csum: Disable KASAN for do_csum() Will Deacon
2020-04-15 17:28 ` Mark Rutland
2020-04-15 18:42 ` Arnd Bergmann
2020-04-15 19:43 ` Will Deacon
2020-04-15 20:10 ` Will Deacon
2020-04-15 19:26 ` Will Deacon
2020-04-16 9:31 ` Mark Rutland
2020-04-16 11:53 ` Will Deacon
2020-04-16 12:11 ` Mark Rutland
2020-04-15 19:26 ` Robin Murphy
2020-04-15 16:52 ` [PATCH v3 06/12] READ_ONCE: Simplify implementations of {READ,WRITE}_ONCE() Will Deacon
2020-04-15 16:52 ` [PATCH v3 07/12] READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses Will Deacon
2020-04-15 16:52 ` [PATCH v3 08/12] READ_ONCE: Drop pointer qualifiers when reading from scalar types Will Deacon
2020-04-15 16:52 ` [PATCH v3 09/12] locking/barriers: Use '__unqual_scalar_typeof' for load-acquire macros Will Deacon
2020-04-15 16:52 ` [PATCH v3 10/12] arm64: barrier: Use '__unqual_scalar_typeof' for acquire/release macros Will Deacon
2020-04-15 16:52 ` [PATCH v3 11/12] compiler/gcc: Raise minimum GCC version for kernel builds to 4.8 Will Deacon
2020-04-15 18:37 ` Arnd Bergmann
2020-04-15 16:52 ` [PATCH v3 12/12] gcov: Remove old GCC 3.4 support Will Deacon
2020-04-16 12:30 ` [PATCH v3 00/12] Rework READ_ONCE() to improve codegen Christian Borntraeger
2020-04-16 12:48 ` Will Deacon
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