Date: Fri, 31 Jul 2015 09:52:59 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: yalin wang <yalin.wang2010@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>, Ingo Molnar <mingo@kernel.org>,
        anton@samba.org, mark.rutland@arm.com,
        linux-arm-kernel@lists.infradead.org,
        open list <linux-kernel@vger.kernel.org>, jbaron@akamai.com
Subject: Re: [RFC] arm64:change jump_label to use branch instruction, not use
  NOP instr
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References: <94E2034B-9DE4-4ADF-8B2F-197D38A363CF@gmail.com>
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On Fri, Jul 31, 2015 at 03:41:37PM +0800, yalin wang wrote:
> This change a little arch_static_branch(), use b . + 4 for false
> return, why? According to aarch64 TRM, if both source and dest
> instr are branch instr, can patch the instr directly, don't need
> all cpu to do ISB for sync, this means we can call
> aarch64_insn_patch_text_nosync() during patch_text(),
> will improve the performance when change a static_key.

This doesn't parse.. What?

Also, this conflicts with the jump label patches I've got.
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