From: Will Deacon <will@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: elver@google.com, tglx@linutronix.de, paulmck@kernel.org,
mingo@kernel.org, peterz@infradead.org, will@kernel.org
Subject: [PATCH v5 00/18] Rework READ_ONCE() to improve codegen
Date: Mon, 11 May 2020 21:41:32 +0100 [thread overview]
Message-ID: <20200511204150.27858-1-will@kernel.org> (raw)
Hi folks,
(trimmed CC list since v4 since this is largely just a rebase)
This is version five of the READ_ONCE() codegen improvement series that
I've 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
v4: https://lore.kernel.org/lkml/20200421151537.19241-1-will@kernel.org
The main change since v4 is that this is now based on top of the KCSAN
changes queued in -tip (locking/kcsan) and therefore contains the patches
necessary to avoid breaking sparc32 as well as some cleanups to
consolidate {READ,WRITE}_ONCE() and data_race().
Other changes include:
* Treat 'char' as distinct from 'signed char' and 'unsigned char' for
__builtin_types_compatible_p()
* Add a compile-time assertion that the argument to READ_ONCE_NOCHECK()
points at something the same size as 'unsigned long'
I'm happy for all of this to go via -tip, or I can take it via arm64.
Please let me know.
Cheers,
Will
Cc: Marco Elver <elver@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
--->8
Will Deacon (18):
sparc32: mm: Fix argument checking in __srmmu_get_nocache()
sparc32: mm: Restructure sparc32 MMU page-table layout
sparc32: mm: Change pgtable_t type to pte_t * instead of struct page *
sparc32: mm: Reduce allocation size for PMD and PTE tables
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
kcsan: Rework data_race() so that it can be used by READ_ONCE()
READ_ONCE: Use data_race() to avoid KCSAN instrumentation
linux/compiler.h: Remove redundant '#else'
Documentation/process/changes.rst | 2 +-
arch/arm/crypto/Kconfig | 12 +-
arch/arm64/include/asm/barrier.h | 16 +-
arch/arm64/lib/csum.c | 20 +-
arch/sparc/include/asm/page_32.h | 12 +-
arch/sparc/include/asm/pgalloc_32.h | 11 +-
arch/sparc/include/asm/pgtable_32.h | 40 +-
arch/sparc/include/asm/pgtsrmmu.h | 36 +-
arch/sparc/include/asm/viking.h | 5 +-
arch/sparc/kernel/head_32.S | 8 +-
arch/sparc/mm/hypersparc.S | 3 +-
arch/sparc/mm/srmmu.c | 95 ++---
arch/sparc/mm/viking.S | 5 +-
crypto/Kconfig | 1 -
drivers/xen/time.c | 2 +-
include/asm-generic/barrier.h | 16 +-
include/linux/compiler-gcc.h | 5 +-
include/linux/compiler.h | 207 +++++-----
include/linux/compiler_types.h | 26 ++
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 +-
27 files changed, 257 insertions(+), 876 deletions(-)
delete mode 100644 kernel/gcov/gcc_3_4.c
--
2.26.2.645.ge9eca65c58-goog
next reply other threads:[~2020-05-11 20:42 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-11 20:41 Will Deacon [this message]
2020-05-11 20:41 ` [PATCH v5 01/18] sparc32: mm: Fix argument checking in __srmmu_get_nocache() Will Deacon
2020-05-12 14:37 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 02/18] sparc32: mm: Restructure sparc32 MMU page-table layout Will Deacon
2020-05-12 14:37 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 03/18] sparc32: mm: Change pgtable_t type to pte_t * instead of struct page * Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 04/18] sparc32: mm: Reduce allocation size for PMD and PTE tables Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-17 0:00 ` [PATCH v5 04/18] " Guenter Roeck
2020-05-17 0:07 ` Guenter Roeck
2020-05-18 8:37 ` Will Deacon
2020-05-18 9:18 ` Mike Rapoport
2020-05-18 9:48 ` Guenter Roeck
2020-05-18 14:23 ` Mike Rapoport
2020-05-18 16:08 ` Guenter Roeck
2020-05-18 18:11 ` Ira Weiny
2020-05-18 18:14 ` Ira Weiny
2020-05-18 18:09 ` Guenter Roeck
2020-05-18 18:21 ` Ira Weiny
2020-05-18 19:15 ` Mike Rapoport
2020-05-19 16:40 ` Guenter Roeck
2020-05-20 17:03 ` Mike Rapoport
2020-05-20 19:03 ` Guenter Roeck
2020-05-20 19:51 ` Mike Rapoport
2020-05-21 23:02 ` Guenter Roeck
2020-05-24 12:32 ` Mike Rapoport
2020-05-24 14:01 ` Guenter Roeck
2020-05-26 13:26 ` Will Deacon
2020-05-26 14:01 ` Will Deacon
2020-05-26 15:21 ` Mike Rapoport
2020-05-26 16:18 ` Guenter Roeck
2020-05-26 16:29 ` Mike Rapoport
2020-05-26 17:15 ` Guenter Roeck
2020-05-11 20:41 ` [PATCH v5 05/18] compiler/gcc: Raise minimum GCC version for kernel builds to 4.8 Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 06/18] netfilter: Avoid assigning 'const' pointer to non-const pointer Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 07/18] net: tls: " Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 08/18] fault_inject: Don't rely on "return value" from WRITE_ONCE() Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 09/18] arm64: csum: Disable KASAN for do_csum() Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 10/18] READ_ONCE: Simplify implementations of {READ,WRITE}_ONCE() Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 11/18] READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 12/18] READ_ONCE: Drop pointer qualifiers when reading from scalar types Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 13/18] locking/barriers: Use '__unqual_scalar_typeof' for load-acquire macros Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 14/18] arm64: barrier: Use '__unqual_scalar_typeof' for acquire/release macros Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 15/18] gcov: Remove old GCC 3.4 support Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 16/18] kcsan: Rework data_race() so that it can be used by READ_ONCE() Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-11 20:41 ` [PATCH v5 17/18] READ_ONCE: Use data_race() to avoid KCSAN instrumentation Will Deacon
2020-05-12 8:23 ` Peter Zijlstra
2020-05-12 9:49 ` Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-20 22:17 ` Borislav Petkov
2020-05-20 22:30 ` Marco Elver
2020-05-21 7:25 ` Borislav Petkov
2020-05-21 9:37 ` Marco Elver
2020-05-21 3:30 ` Nathan Chancellor
2020-05-22 16:08 ` [tip: locking/kcsan] compiler.h: Avoid nested statement expression in data_race() tip-bot2 for Marco Elver
2020-05-11 20:41 ` [PATCH v5 18/18] linux/compiler.h: Remove redundant '#else' Will Deacon
2020-05-12 14:36 ` [tip: locking/kcsan] " tip-bot2 for Will Deacon
2020-05-12 8:18 ` [PATCH v5 00/18] Rework READ_ONCE() to improve codegen Peter Zijlstra
2020-05-12 17:53 ` Marco Elver
2020-05-12 18:55 ` Marco Elver
2020-05-12 19:07 ` Peter Zijlstra
2020-05-12 20:31 ` Marco Elver
2020-05-13 11:10 ` Peter Zijlstra
2020-05-13 11:14 ` Peter Zijlstra
2020-05-13 11:48 ` Marco Elver
2020-05-13 12:32 ` Peter Zijlstra
2020-05-13 12:40 ` Will Deacon
2020-05-13 13:15 ` Marco Elver
2020-05-13 13:24 ` Peter Zijlstra
2020-05-13 13:58 ` Marco Elver
2020-05-14 11:21 ` Peter Zijlstra
2020-05-14 11:24 ` Peter Zijlstra
2020-05-14 11:35 ` Peter Zijlstra
2020-05-14 12:01 ` Will Deacon
2020-05-14 12:27 ` Peter Zijlstra
2020-05-14 13:07 ` Marco Elver
2020-05-14 13:14 ` Peter Zijlstra
2020-05-14 12:20 ` Peter Zijlstra
2020-05-14 14:13 ` Peter Zijlstra
2020-05-14 14:20 ` Marco Elver
2020-05-15 9:20 ` Peter Zijlstra
2020-05-13 16:50 ` Will Deacon
2020-05-13 17:32 ` Marco Elver
2020-05-13 17:47 ` Will Deacon
2020-05-13 18:54 ` Marco Elver
2020-05-13 21:25 ` Will Deacon
2020-05-14 7:31 ` Marco Elver
2020-05-14 11:05 ` Will Deacon
2020-05-14 13:35 ` Marco Elver
2020-05-14 13:47 ` Peter Zijlstra
2020-05-14 13:50 ` Peter Zijlstra
2020-05-14 13:56 ` Peter Zijlstra
2020-05-14 14:24 ` Peter Zijlstra
2020-05-14 15:09 ` Thomas Gleixner
2020-05-14 15:29 ` Marco Elver
2020-05-14 19:37 ` Thomas Gleixner
2020-05-15 13:55 ` David Laight
2020-05-15 14:04 ` Marco Elver
2020-05-15 14:07 ` Peter Zijlstra
2020-05-14 15:38 ` Paul E. McKenney
2020-05-22 16:08 ` [tip: locking/kcsan] kcsan: Restrict supported compilers tip-bot2 for Marco Elver
2020-06-03 18:52 ` [PATCH v5 00/18] Rework READ_ONCE() to improve codegen Borislav Petkov
2020-06-03 19:23 ` Marco Elver
2020-06-03 22:05 ` Borislav Petkov
2020-06-08 17:32 ` Martin Liška
2020-06-08 19:56 ` Marco Elver
2020-06-09 11:55 ` Martin Liška
2020-06-09 12:36 ` Martin Liška
2020-06-09 13:45 ` Marco Elver
2020-05-22 16:08 ` [tip: locking/kcsan] kcsan: Remove 'noinline' from __no_kcsan_or_inline tip-bot2 for Marco Elver
2020-05-13 13:21 ` [PATCH v5 00/18] Rework READ_ONCE() to improve codegen David Laight
2020-05-13 16:32 ` Thomas Gleixner
2020-05-12 21:14 ` Will Deacon
2020-05-12 22:00 ` Marco Elver
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