From: Christoph Hellwig <hch@lst.de>
To: Matthew Wilcox <willy@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>,
akpm@linux-foundation.org, jack@suse.cz,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
dhowells@redhat.com, marc.dionne@auristor.com,
linux-afs@lists.infradead.org,
syzbot+48011b86c8ea329af1b9@syzkaller.appspotmail.com
Subject: Re: [PATCH 1/2] filemap: fix the conditional folio_put in filemap_fault
Date: Wed, 3 May 2023 17:49:36 +0200 [thread overview]
Message-ID: <20230503154936.GA31522@lst.de> (raw)
In-Reply-To: <ZFKCRPRgoKWaWhQW@casper.infradead.org>
On Wed, May 03, 2023 at 04:48:20PM +0100, Matthew Wilcox wrote:
> > - folio_put(folio);
>
> Why not simply:
>
> - if (folio)
> + if (!IS_ERR_OR_NULL(folio))
no need for the OR_NULL. But I find the extra label way easier to
reason about, and it's exactly the same amount of code.
next prev parent reply other threads:[~2023-05-03 15:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-03 15:45 Christoph Hellwig
2023-05-03 15:45 ` [PATCH 2/2] afs: fix the afs_dir_get_folio return value Christoph Hellwig
2023-05-03 15:54 ` Jan Kara
2023-05-03 15:48 ` [PATCH 1/2] filemap: fix the conditional folio_put in filemap_fault Matthew Wilcox
2023-05-03 15:49 ` Christoph Hellwig [this message]
2023-05-04 3:34 ` Matthew Wilcox
2023-05-03 15:57 ` Jan Kara
2023-05-03 18:55 ` [PATCH 2/2] afs: fix the afs_dir_get_folio return value David Howells
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