LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Kent Overstreet <kent.overstreet@gmail.com>
To: Liu Bo <obuil.liubo@gmail.com>
Cc: linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk,
	akpm@linux-foundation.org, willy@infradead.org,
	gregkh@linuxfoundation.org,
	linux-security-module@vger.kernel.org, selinux@tycho.nsa.gov,
	dev@openvswitch.org, shli@kernel.org, linux-raid@vger.kernel.org
Subject: Re: [PATCH 1/6] Generic radix trees
Date: Sat, 26 May 2018 01:56:01 -0400	[thread overview]
Message-ID: <20180526055601.GA26155@kmo-pixel> (raw)
In-Reply-To: <CANQeFDCLc56thuuGYBMdb_qvw_O=t7sLkJiP-LNYfKwgz74H_w@mail.gmail.com>

On Sat, May 26, 2018 at 11:16:42AM +0800, Liu Bo wrote:
> > +/*
> > + * Returns pointer to the specified byte @offset within @radix, allocating it if
> > + * necessary - newly allocated slots are always zeroed out:
> > + */
> > +void *__genradix_ptr_alloc(struct __genradix *radix, size_t offset,
> > +                          gfp_t gfp_mask)
> > +{
> > +       struct genradix_node **n;
> 
> Any reason that " struct genradix_node ** " is used here instead of "
> struct genradix_node * "?
> 
> Looks like this function only manipulates *n, am I missing something?

It stores to *n, when it has to allocate a node (including the root)

  reply	other threads:[~2018-05-26  5:56 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-23  1:18 Kent Overstreet
2018-05-23  1:18 ` [PATCH 2/6] proc: commit to genradix Kent Overstreet
2018-05-23 11:28   ` Matthew Wilcox
2018-05-23 22:18     ` Kent Overstreet
2018-05-23  1:18 ` [PATCH 3/6] md: convert " Kent Overstreet
2018-05-23  1:18 ` [PATCH 4/6] openvswitch: " Kent Overstreet
2018-05-23 12:34   ` Matthew Wilcox
2018-05-23 22:24     ` Kent Overstreet
2018-05-23  1:18 ` [PATCH 5/6] selinux: " Kent Overstreet
2018-05-23  1:18 ` [PATCH 6/6] Drop flex_arrays Kent Overstreet
2018-05-23 13:39   ` Jonathan Corbet
2018-05-23 17:24   ` Dave Hansen
2018-05-23 22:06     ` Kent Overstreet
2018-05-26  3:16 ` [PATCH 1/6] Generic radix trees Liu Bo
2018-05-26  5:56   ` Kent Overstreet [this message]
2018-05-29  1:48     ` Liu Bo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180526055601.GA26155@kmo-pixel \
    --to=kent.overstreet@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=dev@openvswitch.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-raid@vger.kernel.org \
    --cc=linux-security-module@vger.kernel.org \
    --cc=obuil.liubo@gmail.com \
    --cc=selinux@tycho.nsa.gov \
    --cc=shli@kernel.org \
    --cc=viro@zeniv.linux.org.uk \
    --cc=willy@infradead.org \
    --subject='Re: [PATCH 1/6] Generic radix trees' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).