lkml.org 
[lkml]   [2018]   [May]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 7/8] rhashtable: add rhashtable_walk_prev()
On Fri, May 04, 2018 at 01:54:14PM +1000, NeilBrown wrote:
> rhashtable_walk_prev() returns the object returned by
> the previous rhashtable_walk_next(), providing it is still in the
> table (or was during this grace period).
> This works even if rhashtable_walk_stop() and rhashtable_talk_start()
> have been called since the last rhashtable_walk_next().
>
> If there have been no calls to rhashtable_walk_next(), or if the
> object is gone from the table, then NULL is returned.
>
> This can usefully be used in a seq_file ->start() function.
> If the pos is the same as was returned by the last ->next() call,
> then rhashtable_walk_prev() can be used to re-establish the
> current location in the table. If it returns NULL, then
> rhashtable_walk_next() should be used.
>
> Signed-off-by: NeilBrown <neilb@suse.com>

I will ack this if Tom is OK with replacing peek with it.

Cheers,
--
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

\
 
 \ /
  Last update: 2018-05-05 11:44    [W:0.127 / U:1.352 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site