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Date: Mon, 3 Aug 2015 17:57:57 -0400 From: Steven Rostedt <rostedt@...dmis.org> To: Peter Zijlstra <peterz@...radead.org> Cc: Vlastimil Babka <vbabka@...e.cz>, linux-kernel@...r.kernel.org, mingo@...nel.org, jasonbaron0@...il.com, bp@...en8.de, luto@...capital.net, tglx@...utronix.de, will.deacon@....com, liuj97@...il.com, rabin@....in, ralf@...ux-mips.org, ddaney@...iumnetworks.com, benh@...nel.crashing.org, michael@...erman.id.au, heiko.carstens@...ibm.com, davem@...emloft.net Subject: Re: [PATCH -v2 6/8] jump_label: Add a new static_key interface On Mon, 3 Aug 2015 22:00:02 +0200 Peter Zijlstra <peterz@...radead.org> wrote: > On Mon, Aug 03, 2015 at 03:28:10PM -0400, Steven Rostedt wrote: > > Technically, one can think: "activate the branch", but we are > > activating not the branch, but the jump label itself. > > No you are enabling the branch, you're making the branch body active. By making the statement "true". Otherwise we could just have: static_branch_likely(&blah) { [..] } And remove the "if". Then it would make sense to enable or disable it. > > There is no enable/disable/true/false for the jump label, only NOP or > JUMP, and either can result in an active branch body. That's implementation details, not a general concept that users will need to know about. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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