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From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: linux-snps-arc@lists.infradead.org
Cc: Peter Zijlstra <peterz@infradead.org>,
	Will Deacon <will@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
	Mark Rutland <mark.rutland@arm.com>,
	linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
	Vladimir Isaev <Vladimir.Isaev@synopsys.com>,
	Vineet Gupta <Vineet.Gupta1@synopsys.com>
Subject: [PATCH 00/11] ARC atomics update
Date: Wed,  4 Aug 2021 12:15:43 -0700	[thread overview]
Message-ID: <20210804191554.1252776-1-vgupta@synopsys.com> (raw)

Hi,

This series contains long due update to ARC atomics, discussed back
in 2018 [1] and [2]. I had them for arc64 port and decided to post them
here for some review and inclusion, after Mark's rework.

The main changes are use of relaxed atomics and generic bitops. Latter
does cause some cogen bloat on ARC due to signed args but that can be
reviewd seperately consider cross-arch impact.

The changes survive glibc testsuite with no regressions whatsoever.

Please review and provide any feedback.

Thx,
-Vineet

[1] https://lore.kernel.org/r/20180830144344.GW24142@hirez.programming.kicks-ass.net
[2] https://lore.kernel.org/r/20180830135749.GA13005@arm.com


Vineet Gupta (10):
  ARC: atomics: disintegrate header
  ARC: atomic: !LLSC: remove hack in atomic_set() for for UP
  ARC: atomic: !LLSC: use int data type consistently
  ARC: atomic64: LLSC: elide unused atomic_{and,or,xor,andnot}_return
  ARC: atomics: implement relaxed variants
  ARC: bitops: fls/ffs to take int (vs long) per asm-generic defines
  ARC: xchg: !LLSC: remove UP micro-optimization/hack
  ARC: cmpxchg/xchg: rewrite as macros to make type safe
  ARC: cmpxchg/xchg: implement relaxed variants (LLSC config only)
  ARC: atomic_cmpxchg/atomic_xchg: implement relaxed variants

Will Deacon (1):
  ARC: switch to generic bitops

 arch/arc/include/asm/atomic-llsc.h     |  97 ++++++
 arch/arc/include/asm/atomic-spinlock.h | 102 ++++++
 arch/arc/include/asm/atomic.h          | 444 ++-----------------------
 arch/arc/include/asm/atomic64-arcv2.h  | 250 ++++++++++++++
 arch/arc/include/asm/bitops.h          | 188 +----------
 arch/arc/include/asm/cmpxchg.h         | 233 ++++++-------
 arch/arc/include/asm/smp.h             |  14 -
 arch/arc/kernel/smp.c                  |   2 -
 8 files changed, 588 insertions(+), 742 deletions(-)
 create mode 100644 arch/arc/include/asm/atomic-llsc.h
 create mode 100644 arch/arc/include/asm/atomic-spinlock.h
 create mode 100644 arch/arc/include/asm/atomic64-arcv2.h

-- 
2.25.1


             reply	other threads:[~2021-08-04 19:16 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-04 19:15 Vineet Gupta [this message]
2021-08-04 19:15 ` [PATCH 01/11] ARC: atomics: disintegrate header Vineet Gupta
2021-08-04 19:15 ` [PATCH 02/11] ARC: atomic: !LLSC: remove hack in atomic_set() for for UP Vineet Gupta
2021-08-04 19:15 ` [PATCH 03/11] ARC: atomic: !LLSC: use int data type consistently Vineet Gupta
2021-08-04 19:15 ` [PATCH 04/11] ARC: atomic64: LLSC: elide unused atomic_{and,or,xor,andnot}_return Vineet Gupta
2021-08-04 19:15 ` [PATCH 05/11] ARC: atomics: implement relaxed variants Vineet Gupta
2021-08-04 19:15 ` [PATCH 06/11] ARC: switch to generic bitops Vineet Gupta
2021-08-04 19:15 ` [PATCH 07/11] ARC: bitops: fls/ffs to take int (vs long) per asm-generic defines Vineet Gupta
2021-08-04 19:15 ` [PATCH 08/11] ARC: xchg: !LLSC: remove UP micro-optimization/hack Vineet Gupta
2021-08-04 19:15 ` [PATCH 09/11] ARC: cmpxchg/xchg: rewrite as macros to make type safe Vineet Gupta
2021-08-04 19:15 ` [PATCH 10/11] ARC: cmpxchg/xchg: implement relaxed variants (LLSC config only) Vineet Gupta
2021-08-04 19:15 ` [PATCH 11/11] ARC: atomic_cmpxchg/atomic_xchg: implement relaxed variants Vineet Gupta
2021-08-05  9:02 ` [PATCH 00/11] ARC atomics update Peter Zijlstra
2021-08-05 16:18   ` Vineet Gupta
2021-08-05 17:04     ` Peter Zijlstra
2021-08-05 19:14       ` [RFC] bitops/non-atomic: make @nr unsigned to avoid any DIV Vineet Gupta
2021-08-06 13:42         ` Will Deacon
2021-08-06 19:02           ` Vineet Gupta
2021-08-06  8:41       ` [PATCH 00/11] ARC atomics update Will Deacon

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