linux-mm.kvack.org archive mirror
 help / color / mirror / Atom feed
From: Andrey Konovalov <andreyknvl@google.com>
To: Marco Elver <elver@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>,
	Alexander Potapenko <glider@google.com>,
	 Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	 Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Evgenii Stepanov <eugenis@google.com>,
	 Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Branislav Rankov <Branislav.Rankov@arm.com>,
	 Kevin Brodsky <kevin.brodsky@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	 kasan-dev <kasan-dev@googlegroups.com>,
	 Linux ARM <linux-arm-kernel@lists.infradead.org>,
	 Linux Memory Management List <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 10/20] kasan: inline and rename kasan_unpoison_memory
Date: Thu, 12 Nov 2020 20:45:18 +0100	[thread overview]
Message-ID: <CAAeHK+wvvkYko=tM=NHODkKas13h5Jvsswvg05jhv9LqE0jSjQ@mail.gmail.com> (raw)
In-Reply-To: <20201111174902.GK517454@elver.google.com>

On Wed, Nov 11, 2020 at 6:49 PM Marco Elver <elver@google.com> wrote:
>
> On Tue, Nov 10, 2020 at 11:20PM +0100, Andrey Konovalov wrote:
> > Currently kasan_unpoison_memory() is used as both an external annotation
> > and as an internal memory poisoning helper. Rename external annotation to
> > kasan_unpoison_data() and inline the internal helper for hardware
> > tag-based mode to avoid undeeded function calls.
>
> I don't understand why this needs to be renamed again. The users of
> kasan_unpoison_memory() outweigh those of kasan_unpoison_slab(), of
> which there seems to be only 1!

The idea is to make kasan_(un)poison_memory() functions inlinable for
internal use. It doesn't have anything to do with the number of times
they are used.

Perhaps we can drop the kasan_ prefix for the internal implementations
though, and keep using kasan_unpoison_memory() externally.

> So can't we just get rid of kasan_unpoison_slab() and just open-code it
> in mm/mempool.c:kasan_unpoison_element()? That function is already
> kasan-prefixed, so we can even place a small comment there (which would
> also be an improvement over current interface, since
> kasan_unpoison_slab() is not documented and its existence not quite
> justified).

We can, but this is a change unrelated to this patch.


  reply	other threads:[~2020-11-12 19:45 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-10 22:20 [PATCH v2 00/20] kasan: boot parameters for hardware tag-based mode Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 01/20] kasan: simplify quarantine_put call site Andrey Konovalov
2020-11-11 16:08   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 02/20] kasan: rename get_alloc/free_info Andrey Konovalov
2020-11-11 16:09   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 03/20] kasan: introduce set_alloc_info Andrey Konovalov
2020-11-11 16:10   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 04/20] kasan, arm64: unpoison stack only with CONFIG_KASAN_STACK Andrey Konovalov
2020-11-11 16:13   ` Marco Elver
2020-11-12  9:51   ` Catalin Marinas
2020-11-12 19:38     ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 05/20] kasan: allow VMAP_STACK for HW_TAGS mode Andrey Konovalov
2020-11-11 16:20   ` Marco Elver
2020-11-12  0:24     ` Andrey Konovalov
2020-11-12 10:31   ` Catalin Marinas
2020-11-10 22:20 ` [PATCH v2 06/20] kasan: remove __kasan_unpoison_stack Andrey Konovalov
2020-11-11 16:42   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 07/20] kasan: inline kasan_reset_tag for tag-based modes Andrey Konovalov
2020-11-11 16:54   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 08/20] kasan: inline random_tag for HW_TAGS Andrey Konovalov
2020-11-11 17:02   ` Marco Elver
2020-11-12  0:21     ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 09/20] kasan: inline kasan_poison_memory and check_invalid_free Andrey Konovalov
2020-11-11 17:50   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 10/20] kasan: inline and rename kasan_unpoison_memory Andrey Konovalov
2020-11-11 17:49   ` Marco Elver
2020-11-12 19:45     ` Andrey Konovalov [this message]
2020-11-12 19:52       ` Marco Elver
2020-11-12 20:54         ` Andrey Konovalov
2020-11-12 22:20           ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 11/20] kasan: add and integrate kasan boot parameters Andrey Konovalov
2020-11-11 18:29   ` Marco Elver
2020-11-12 19:51     ` Andrey Konovalov
2020-11-12 11:35   ` Catalin Marinas
2020-11-12 11:53     ` Marco Elver
2020-11-12 12:54       ` Catalin Marinas
2020-11-12 19:52         ` Andrey Konovalov
2020-11-13 17:52   ` Marco Elver
2020-11-13 17:55     ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 12/20] kasan, mm: check kasan_enabled in annotations Andrey Konovalov
2020-11-11 14:48   ` Marco Elver
2020-11-12  0:36     ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 13/20] kasan: simplify kasan_poison_kfree Andrey Konovalov
2020-11-11 18:42   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 14/20] kasan, mm: rename kasan_poison_kfree Andrey Konovalov
2020-11-11 18:53   ` Marco Elver
2020-11-12  1:05     ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 15/20] kasan: don't round_up too much Andrey Konovalov
2020-11-11 19:08   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 16/20] kasan: simplify assign_tag and set_tag calls Andrey Konovalov
2020-11-11 19:17   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 17/20] kasan: clarify comment in __kasan_kfree_large Andrey Konovalov
2020-11-11 19:18   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 18/20] kasan: clean up metadata allocation and usage Andrey Konovalov
2020-11-11 23:06   ` Marco Elver
2020-11-12 20:11     ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 19/20] kasan, mm: allow cache merging with no metadata Andrey Konovalov
2020-11-11 15:13   ` Marco Elver
2020-11-12 23:00     ` Andrey Konovalov
2020-11-11 23:27   ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 20/20] kasan: update documentation Andrey Konovalov
2020-11-11 16:03   ` Marco Elver
2020-11-12  0:51     ` Andrey Konovalov
2020-11-10 22:24 ` [PATCH v2 00/20] kasan: boot parameters for hardware tag-based mode Andrey Konovalov

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='CAAeHK+wvvkYko=tM=NHODkKas13h5Jvsswvg05jhv9LqE0jSjQ@mail.gmail.com' \
    --to=andreyknvl@google.com \
    --cc=Branislav.Rankov@arm.com \
    --cc=akpm@linux-foundation.org \
    --cc=aryabinin@virtuozzo.com \
    --cc=catalin.marinas@arm.com \
    --cc=dvyukov@google.com \
    --cc=elver@google.com \
    --cc=eugenis@google.com \
    --cc=glider@google.com \
    --cc=kasan-dev@googlegroups.com \
    --cc=kevin.brodsky@arm.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=vincenzo.frascino@arm.com \
    --cc=will.deacon@arm.com \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
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).