From: Christoph Hellwig <hch@lst.de>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Arnd Bergmann <arnd@arndb.de>, Will Deacon <will@kernel.org>,
Marc Zyngier <maz@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
Ard Biesheuvel <ardb@kernel.org>, Christoph Hellwig <hch@lst.de>,
Isaac Manjarres <isaacmanjarres@google.com>,
Saravana Kannan <saravanak@google.com>,
linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 2/2] treewide: Add the __GFP_PACKED flag to several non-DMA kmalloc() allocations
Date: Sun, 30 Oct 2022 09:47:18 +0100 [thread overview]
Message-ID: <20221030084718.GC5278@lst.de> (raw)
In-Reply-To: <Y1ui8J6lZ2pzjXzt@kroah.com>
On Fri, Oct 28, 2022 at 11:37:52AM +0200, Greg Kroah-Hartman wrote:
> And here's actually the patch...
How is this supposed to work? noderef means any dereference of it will
now make sparse complain. And the whole point of the DMA is to get
data into and out of the system, so except for corner cases like direct
DMA to userspace (which won't use kmalloc) we absolutely do want to
derference it to generate or consume the information.
next prev parent reply other threads:[~2022-10-30 8:47 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-25 20:52 [PATCH v2 0/2] mm: Allow kmalloc() allocations below ARCH_KMALLOC_MINALIGN Catalin Marinas
2022-10-25 20:52 ` [PATCH v2 1/2] mm: slab: Introduce __GFP_PACKED for smaller kmalloc() alignments Catalin Marinas
2022-10-26 6:39 ` Greg Kroah-Hartman
2022-10-26 8:39 ` Catalin Marinas
2022-10-26 9:49 ` Greg Kroah-Hartman
2022-10-26 9:58 ` Catalin Marinas
2022-10-27 12:11 ` Hyeonggon Yoo
2022-10-28 7:32 ` Catalin Marinas
2022-10-25 20:52 ` [PATCH v2 2/2] treewide: Add the __GFP_PACKED flag to several non-DMA kmalloc() allocations Catalin Marinas
2022-10-26 6:50 ` Greg Kroah-Hartman
2022-10-26 9:48 ` Catalin Marinas
2022-10-26 12:59 ` Greg Kroah-Hartman
2022-10-26 17:09 ` Catalin Marinas
2022-10-26 17:21 ` Greg Kroah-Hartman
2022-10-26 17:46 ` Linus Torvalds
2022-10-27 22:29 ` Catalin Marinas
2022-10-28 9:37 ` Greg Kroah-Hartman
2022-10-28 9:37 ` Greg Kroah-Hartman
2022-10-30 8:47 ` Christoph Hellwig [this message]
2022-10-30 9:02 ` Greg Kroah-Hartman
2022-10-30 9:13 ` Christoph Hellwig
2022-10-30 16:43 ` Catalin Marinas
2022-11-01 10:59 ` Christoph Hellwig
2022-11-01 17:19 ` Catalin Marinas
2022-11-01 17:24 ` Christoph Hellwig
2022-11-01 17:32 ` Catalin Marinas
2022-11-01 17:39 ` Christoph Hellwig
2022-11-01 19:10 ` Isaac Manjarres
2022-11-02 11:05 ` Catalin Marinas
2022-11-02 20:50 ` Isaac Manjarres
2022-11-01 18:14 ` Robin Murphy
2022-11-02 13:10 ` Catalin Marinas
2022-10-30 8:46 ` Christoph Hellwig
2022-10-30 8:44 ` Christoph Hellwig
2022-11-03 16:15 ` Vlastimil Babka
2022-11-03 18:03 ` Catalin Marinas
2022-10-26 6:54 ` [PATCH v2 0/2] mm: Allow kmalloc() allocations below ARCH_KMALLOC_MINALIGN Greg Kroah-Hartman
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=20221030084718.GC5278@lst.de \
--to=hch@lst.de \
--cc=akpm@linux-foundation.org \
--cc=ardb@kernel.org \
--cc=arnd@arndb.de \
--cc=catalin.marinas@arm.com \
--cc=gregkh@linuxfoundation.org \
--cc=herbert@gondor.apana.org.au \
--cc=isaacmanjarres@google.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-mm@kvack.org \
--cc=maz@kernel.org \
--cc=saravanak@google.com \
--cc=torvalds@linux-foundation.org \
--cc=will@kernel.org \
/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).