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From: Herbert Xu <herbert@gondor.apana.org.au>
To: NeilBrown <neilb@suse.com>
Cc: Thomas Graf <tgraf@suug.ch>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/6] rhashtable: remove incorrect comment on r{hl, hash}table_walk_enter()
Date: Thu, 19 Apr 2018 11:22:37 +0800	[thread overview]
Message-ID: <20180419032237.yjvjuh6n7n6tggtr@gondor.apana.org.au> (raw)
In-Reply-To: <87efjcqg2r.fsf@notabene.neil.brown.name>

On Thu, Apr 19, 2018 at 08:56:28AM +1000, NeilBrown wrote:
>
> I don't want to do that - I just want the documentation to be correct
> (or at least, not be blatantly incorrect).  The function does not sleep,
> and is safe to call with spin locks held.
> Do we need to spell out when it can be called?  If so, maybe:
> 
>    This function may be called from any process context, including
>    non-preemptable context, but cannot be called from interrupts.

Just to make it perfectly clear, how about "cannot be called from
softirq or hardirq context"? Previously the not able to sleep part
completely ruled out any ambiguity but the new wording could confuse
people into thinking that this can be called from softirq context
where it would be unsafe if mixed with process context usage.

Thanks,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

  reply	other threads:[~2018-04-19  3:22 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-18  6:47 [PATCH 0/6] Assorted rhashtable improvements. RESEND NeilBrown
2018-04-18  6:47 ` [PATCH 3/6] rhashtable: reset iter when rhashtable_walk_start sees new table NeilBrown
2018-04-18  6:47 ` [PATCH 1/6] rhashtable: remove outdated comments about grow_decision etc NeilBrown
2018-04-18 14:29   ` Herbert Xu
2018-04-18 23:09     ` NeilBrown
2018-04-19  1:47       ` David Miller
2018-04-23  1:41         ` NeilBrown
2018-04-18  6:47 ` [PATCH 2/6] rhashtable: remove incorrect comment on r{hl, hash}table_walk_enter() NeilBrown
2018-04-18 14:28   ` Herbert Xu
2018-04-18 22:56     ` NeilBrown
2018-04-19  3:22       ` Herbert Xu [this message]
2018-04-23  1:39         ` NeilBrown
2018-04-23  8:06           ` Herbert Xu
2018-04-18  6:47 ` [PATCH 6/6] rhashtable: add rhashtable_walk_prev() NeilBrown
2018-04-18 14:35   ` Herbert Xu
2018-04-18 23:08     ` NeilBrown
2018-04-23  8:07       ` Herbert Xu
2018-04-18  6:47 ` [PATCH 4/6] rhashtable: improve rhashtable_walk stability when stop/start used NeilBrown
2018-04-18  6:47 ` [PATCH 5/6] rhashtable: further improve stability of rhashtable_walk NeilBrown
  -- strict thread matches above, loose matches on Subject: below --
2018-04-18  6:47 [PATCH 0/6] Assorted rhashtable improvements NeilBrown
2018-04-18  6:47 ` [PATCH 2/6] rhashtable: remove incorrect comment on r{hl, hash}table_walk_enter() NeilBrown

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