From: Matthew Wilcox <willy@infradead.org>
To: Suren Baghdasaryan <surenb@google.com>
Cc: akpm@linux-foundation.org, joro@8bytes.org, will@kernel.org,
trond.myklebust@hammerspace.com, anna@kernel.org, arnd@arndb.de,
herbert@gondor.apana.org.au, davem@davemloft.net,
jikos@kernel.org, benjamin.tissoires@redhat.com, tytso@mit.edu,
jack@suse.com, dennis@kernel.org, tj@kernel.org, cl@linux.com,
jakub@cloudflare.com, penberg@kernel.org, rientjes@google.com,
iamjoonsoo.kim@lge.com, vbabka@suse.cz, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org,
linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev,
linux-arch@vger.kernel.org, linux-crypto@vger.kernel.org,
bpf@vger.kernel.org, linux-input@vger.kernel.org,
linux-ext4@vger.kernel.org, linux-mm@kvack.org,
netdev@vger.kernel.org, linux-security-module@vger.kernel.org,
kent.overstreet@linux.dev
Subject: Re: [PATCH 1/1] mm: change inlined allocation helpers to account at the call site
Date: Thu, 4 Apr 2024 23:33:22 +0100 [thread overview]
Message-ID: <Zg8qstJNfK07siNn@casper.infradead.org> (raw)
In-Reply-To: <CAJuCfpHy5Xo76S7h9rEuA3cQ1pVqurL=wmtQ2cx9-xN1aa_C_A@mail.gmail.com>
On Thu, Apr 04, 2024 at 03:17:43PM -0700, Suren Baghdasaryan wrote:
> Ironically, checkpatch generates warnings for these type casts:
>
> WARNING: unnecessary cast may hide bugs, see
> http://c-faq.com/malloc/mallocnocast.html
> #425: FILE: include/linux/dma-fence-chain.h:90:
> + ((struct dma_fence_chain *)kmalloc(sizeof(struct dma_fence_chain),
> GFP_KERNEL))
>
> I guess I can safely ignore them in this case (since we cast to the
> expected type)?
I find ignoring checkpatch to be a solid move 99% of the time.
I really don't like the codetags. This is so much churn, and it could
all be avoided by just passing in _RET_IP_ or _THIS_IP_ depending on
whether we wanted to profile this function or its caller. vmalloc
has done it this way since 2008 (OK, using __builtin_return_address())
and lockdep has used _THIS_IP_ / _RET_IP_ since 2006.
next prev parent reply other threads:[~2024-04-04 22:33 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-04 16:54 Suren Baghdasaryan
2024-04-04 17:04 ` Matthew Wilcox
2024-04-04 17:08 ` Suren Baghdasaryan
2024-04-04 22:17 ` Suren Baghdasaryan
2024-04-04 22:28 ` Kent Overstreet
2024-04-04 22:33 ` Matthew Wilcox [this message]
2024-04-04 22:38 ` Kent Overstreet
2024-04-04 22:41 ` Andrew Morton
2024-04-04 23:00 ` Kent Overstreet
2024-04-04 23:16 ` Suren Baghdasaryan
2024-04-05 9:53 ` Jan Kara
2024-04-05 13:47 ` Suren Baghdasaryan
2024-04-05 12:44 ` Matthew Wilcox
2024-04-05 13:53 ` Suren Baghdasaryan
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