From: Peter Zijlstra <peterz@infradead.org>
To: "H. Peter Anvin" <hpa@linux.intel.com>
Cc: Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andy Lutomirski <luto@amacapital.net>,
Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH 02/10] x86, asm: use bool for bitops and other assembly outputs
Date: Wed, 8 Jun 2016 09:49:56 +0200 [thread overview]
Message-ID: <20160608074956.GO30154@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1465342269-492350-3-git-send-email-hpa@linux.intel.com>
On Tue, Jun 07, 2016 at 04:31:01PM -0700, H. Peter Anvin wrote:
> From: "H. Peter Anvin" <hpa@zytor.com>
>
> The gcc people have confirmed that using "bool" when combined with
> inline assembly always is treated as a byte-sized operand that can be
> assumed to be 0 or 1, which is exactly what the SET instruction
> emits. Change the output types and intermediate variables of as many
> operations as practical to "bool".
>
> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
> ---
> arch/x86/boot/bitops.h | 8 +++++---
> arch/x86/boot/boot.h | 8 ++++----
> arch/x86/boot/string.c | 2 +-
> arch/x86/include/asm/apm.h | 6 +++---
> arch/x86/include/asm/archrandom.h | 16 ++++++++--------
> arch/x86/include/asm/atomic.h | 8 ++++----
> arch/x86/include/asm/atomic64_64.h | 10 +++++-----
> arch/x86/include/asm/bitops.h | 28 ++++++++++++++--------------
> arch/x86/include/asm/local.h | 8 ++++----
> arch/x86/include/asm/percpu.h | 8 ++++----
> arch/x86/include/asm/rmwcc.h | 4 ++--
> arch/x86/include/asm/rwsem.h | 17 +++++++++--------
> include/linux/random.h | 12 ++++++------
> 13 files changed, 69 insertions(+), 66 deletions(-)
So the only concern I have with this is that the x86 function signatures
are now different from the other architectures.
Not sure how much if anything that matters..
next prev parent reply other threads:[~2016-06-08 7:50 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-07 23:30 [PATCH 00/10] x86: use gcc 6+ asm flag output feature H. Peter Anvin
2016-06-07 23:31 ` [PATCH 01/10] x86, bitops: remove use of "sbb" to return CF H. Peter Anvin
2016-06-07 23:39 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-07 23:31 ` [PATCH 02/10] x86, asm: use bool for bitops and other assembly outputs H. Peter Anvin
2016-06-07 23:40 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-08 7:49 ` Peter Zijlstra [this message]
2016-06-08 8:28 ` [PATCH 02/10] " Ingo Molnar
2016-06-08 8:33 ` Ingo Molnar
2016-06-08 8:55 ` H. Peter Anvin
2016-06-08 9:01 ` Ingo Molnar
2016-06-08 9:12 ` H. Peter Anvin
2016-06-08 9:20 ` Ingo Molnar
2016-06-08 9:31 ` H. Peter Anvin
2016-06-08 9:39 ` Peter Zijlstra
2016-06-08 9:43 ` H. Peter Anvin
2016-06-08 9:40 ` H. Peter Anvin
2016-06-08 8:58 ` H. Peter Anvin
2016-06-08 9:06 ` Ingo Molnar
2016-06-07 23:31 ` [PATCH 03/10] x86, asm: change the GEN_*_RMWcc() macros to not quote the condition H. Peter Anvin
2016-06-07 23:40 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-07 23:31 ` [PATCH 04/10] x86, asm: define CC_SET() and CC_OUT() macros H. Peter Anvin
2016-06-07 23:40 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-08 5:09 ` [PATCH 04/10] " Andy Lutomirski
2016-06-08 19:29 ` H. Peter Anvin
2016-06-08 19:34 ` H. Peter Anvin
2016-06-08 19:35 ` Borislav Petkov
2016-06-07 23:31 ` [PATCH 05/10] x86, asm: change GEN_*_RMWcc() to use CC_SET()/CC_OUT() H. Peter Anvin
2016-06-07 23:41 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-07 23:31 ` [PATCH 06/10] x86, asm: Use CC_SET()/CC_OUT() in <asm/bitops.h> H. Peter Anvin
2016-06-07 23:41 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-07 23:31 ` [PATCH 07/10] x86, asm: Use CC_SET()/CC_OUT() in <asm/percpu.h> H. Peter Anvin
2016-06-07 23:42 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-07 23:31 ` [PATCH 08/10] x86, asm: Use CC_SET()/CC_OUT() in <asm/rwsem.h> H. Peter Anvin
2016-06-07 23:42 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-07 23:31 ` [PATCH 09/10] x86, asm: Use CC_SET()/CC_OUT() and static_cpu_has() in archrandom.h H. Peter Anvin
2016-06-07 23:42 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-08 5:12 ` [PATCH 09/10] " Andy Lutomirski
2016-06-07 23:31 ` [PATCH 10/10] x86, asm, boot: Use CC_SET()/CC_OUT() in arch/x86/boot/boot.h H. Peter Anvin
2016-06-07 23:43 ` [tip:x86/asm] " tip-bot for H. Peter Anvin
2016-06-08 8:00 ` [PATCH 00/10] x86: use gcc 6+ asm flag output feature Peter Zijlstra
2016-06-08 8:56 ` H. Peter Anvin
2016-06-08 8:26 ` Ingo Molnar
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