From: Will Deacon <will.deacon@arm.com> To: linux-kernel@vger.kernel.org Cc: peterz@infradead.org, mingo@kernel.org, linux-arm-kernel@lists.infradead.org, yamada.masahiro@socionext.com, Will Deacon <will.deacon@arm.com> Subject: [RFC PATCH v2 00/12] Rewrite asm-generic/bitops/{atomic,lock}.h and use on arm64 Date: Mon, 26 Feb 2018 15:04:48 +0000 [thread overview] Message-ID: <1519657500-15094-1-git-send-email-will.deacon@arm.com> (raw) Hi everyone, This is version two of the RFC I previously posted here: https://www.spinics.net/lists/arm-kernel/msg634719.html Changes since v1 include: * Fixed __clear_bit_unlock to work on archs with lock-based atomics * Moved lock ops into bitops/lock.h * Fixed build breakage on lesser-spotted architectures Trying to fix the circular #includes introduced by pulling atomic.h into btops/lock.h has been driving me insane. I've ended up moving some basic BIT definitions into bits.h, but this might all be better in const.h which is being proposed by Masahiro. Feedback is especially welcome on this part. I've not bothered optimising for the case of a 64-bit, big-endian architecture that uses the generic implementation of atomic64_t because it's both messy and hypothetical. The code here should still work correctly for that case, it just sucks (as does the implementation currently in mainline). Cheers, Will --->8 Will Deacon (12): h8300: Don't include linux/kernel.h in asm/atomic.h m68k: Don't use asm-generic/bitops/lock.h asm-generic: Move some macros from linux/bitops.h to a new bits.h file openrisc: Don't pull in all of linux/bitops.h in asm/cmpxchg.h sh: Don't pull in all of linux/bitops.h in asm/cmpxchg-xchg.h arm64: fpsimd: include <linux/init.h> in fpsimd.h arm64: lse: Include compiler_types.h and export.h for out-of-line LL/SC arm64: cmpxchg: Include build_bug.h instead of bug.h for BUILD_BUG asm-generic/bitops/atomic.h: Rewrite using atomic_fetch_* asm-generic/bitops/lock.h: Rewrite using atomic_fetch_* arm64: Replace our atomic/lock bitop implementations with asm-generic arm64: bitops: Include <asm-generic/bitops/ext2-atomic-setbit.h> arch/arm64/include/asm/bitops.h | 21 +--- arch/arm64/include/asm/cmpxchg.h | 2 +- arch/arm64/include/asm/fpsimd.h | 1 + arch/arm64/include/asm/lse.h | 2 + arch/arm64/lib/Makefile | 2 +- arch/arm64/lib/bitops.S | 76 --------------- arch/h8300/include/asm/atomic.h | 4 +- arch/m68k/include/asm/bitops.h | 6 +- arch/openrisc/include/asm/cmpxchg.h | 3 +- arch/sh/include/asm/cmpxchg-xchg.h | 3 +- include/asm-generic/bitops/atomic.h | 188 +++++++----------------------------- include/asm-generic/bitops/lock.h | 68 ++++++++++--- include/asm-generic/bits.h | 26 +++++ include/linux/bitops.h | 22 +---- 14 files changed, 135 insertions(+), 289 deletions(-) delete mode 100644 arch/arm64/lib/bitops.S create mode 100644 include/asm-generic/bits.h -- 2.1.4
WARNING: multiple messages have this Message-ID (diff)
From: will.deacon@arm.com (Will Deacon) To: linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH v2 00/12] Rewrite asm-generic/bitops/{atomic, lock}.h and use on arm64 Date: Mon, 26 Feb 2018 15:04:48 +0000 [thread overview] Message-ID: <1519657500-15094-1-git-send-email-will.deacon@arm.com> (raw) Hi everyone, This is version two of the RFC I previously posted here: https://www.spinics.net/lists/arm-kernel/msg634719.html Changes since v1 include: * Fixed __clear_bit_unlock to work on archs with lock-based atomics * Moved lock ops into bitops/lock.h * Fixed build breakage on lesser-spotted architectures Trying to fix the circular #includes introduced by pulling atomic.h into btops/lock.h has been driving me insane. I've ended up moving some basic BIT definitions into bits.h, but this might all be better in const.h which is being proposed by Masahiro. Feedback is especially welcome on this part. I've not bothered optimising for the case of a 64-bit, big-endian architecture that uses the generic implementation of atomic64_t because it's both messy and hypothetical. The code here should still work correctly for that case, it just sucks (as does the implementation currently in mainline). Cheers, Will --->8 Will Deacon (12): h8300: Don't include linux/kernel.h in asm/atomic.h m68k: Don't use asm-generic/bitops/lock.h asm-generic: Move some macros from linux/bitops.h to a new bits.h file openrisc: Don't pull in all of linux/bitops.h in asm/cmpxchg.h sh: Don't pull in all of linux/bitops.h in asm/cmpxchg-xchg.h arm64: fpsimd: include <linux/init.h> in fpsimd.h arm64: lse: Include compiler_types.h and export.h for out-of-line LL/SC arm64: cmpxchg: Include build_bug.h instead of bug.h for BUILD_BUG asm-generic/bitops/atomic.h: Rewrite using atomic_fetch_* asm-generic/bitops/lock.h: Rewrite using atomic_fetch_* arm64: Replace our atomic/lock bitop implementations with asm-generic arm64: bitops: Include <asm-generic/bitops/ext2-atomic-setbit.h> arch/arm64/include/asm/bitops.h | 21 +--- arch/arm64/include/asm/cmpxchg.h | 2 +- arch/arm64/include/asm/fpsimd.h | 1 + arch/arm64/include/asm/lse.h | 2 + arch/arm64/lib/Makefile | 2 +- arch/arm64/lib/bitops.S | 76 --------------- arch/h8300/include/asm/atomic.h | 4 +- arch/m68k/include/asm/bitops.h | 6 +- arch/openrisc/include/asm/cmpxchg.h | 3 +- arch/sh/include/asm/cmpxchg-xchg.h | 3 +- include/asm-generic/bitops/atomic.h | 188 +++++++----------------------------- include/asm-generic/bitops/lock.h | 68 ++++++++++--- include/asm-generic/bits.h | 26 +++++ include/linux/bitops.h | 22 +---- 14 files changed, 135 insertions(+), 289 deletions(-) delete mode 100644 arch/arm64/lib/bitops.S create mode 100644 include/asm-generic/bits.h -- 2.1.4
next reply other threads:[~2018-02-26 15:05 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-02-26 15:04 Will Deacon [this message] 2018-02-26 15:04 ` [RFC PATCH v2 00/12] Rewrite asm-generic/bitops/{atomic, lock}.h and use on arm64 Will Deacon 2018-02-26 15:04 ` [RFC PATCH v2 01/12] h8300: Don't include linux/kernel.h in asm/atomic.h Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:04 ` [RFC PATCH v2 02/12] m68k: Don't use asm-generic/bitops/lock.h Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:04 ` [RFC PATCH v2 03/12] asm-generic: Move some macros from linux/bitops.h to a new bits.h file Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:04 ` [RFC PATCH v2 04/12] openrisc: Don't pull in all of linux/bitops.h in asm/cmpxchg.h Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:04 ` [RFC PATCH v2 05/12] sh: Don't pull in all of linux/bitops.h in asm/cmpxchg-xchg.h Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:04 ` [RFC PATCH v2 06/12] arm64: fpsimd: include <linux/init.h> in fpsimd.h Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:37 ` Mark Rutland 2018-02-26 15:37 ` Mark Rutland 2018-02-26 15:04 ` [RFC PATCH v2 07/12] arm64: lse: Include compiler_types.h and export.h for out-of-line LL/SC Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:42 ` Mark Rutland 2018-02-26 15:42 ` Mark Rutland 2018-02-26 15:04 ` [RFC PATCH v2 08/12] arm64: cmpxchg: Include build_bug.h instead of bug.h for BUILD_BUG Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:48 ` Mark Rutland 2018-02-26 15:48 ` Mark Rutland 2018-02-27 17:33 ` Will Deacon 2018-02-27 17:33 ` Will Deacon 2018-02-27 17:34 ` Mark Rutland 2018-02-27 17:34 ` Mark Rutland 2018-02-26 15:04 ` [RFC PATCH v2 09/12] asm-generic/bitops/atomic.h: Rewrite using atomic_fetch_* Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:04 ` [RFC PATCH v2 10/12] asm-generic/bitops/lock.h: " Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:04 ` [RFC PATCH v2 11/12] arm64: Replace our atomic/lock bitop implementations with asm-generic Will Deacon 2018-02-26 15:04 ` Will Deacon 2018-02-26 15:05 ` [RFC PATCH v2 12/12] arm64: bitops: Include <asm-generic/bitops/ext2-atomic-setbit.h> Will Deacon 2018-02-26 15:05 ` Will Deacon 2018-03-01 7:16 ` [RFC PATCH v2 00/12] Rewrite asm-generic/bitops/{atomic,lock}.h and use on arm64 Masahiro Yamada 2018-03-01 7:16 ` Masahiro Yamada 2018-03-12 3:56 ` Masahiro Yamada 2018-03-12 3:56 ` Masahiro Yamada 2018-03-19 17:21 ` Will Deacon 2018-03-19 17:21 ` Will Deacon
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