From: Matthew Wilcox <willy@infradead.org>
To: Christoph Hellwig <hch@lst.de>
Cc: 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 16:48:20 +0100 [thread overview]
Message-ID: <ZFKCRPRgoKWaWhQW@casper.infradead.org> (raw)
In-Reply-To: <20230503154526.1223095-1-hch@lst.de>
On Wed, May 03, 2023 at 05:45:25PM +0200, Christoph Hellwig wrote:
> @@ -3372,14 +3372,14 @@ vm_fault_t filemap_fault(struct vm_fault *vmf)
>
> return VM_FAULT_SIGBUS;
>
> +out_retry_put_folio:
> + folio_put(folio);
> out_retry:
> /*
> * We dropped the mmap_lock, we need to return to the fault handler to
> * re-find the vma and come back and find our hopefully still populated
> * page.
> */
> - if (folio)
> - folio_put(folio);
Why not simply:
- if (folio)
+ if (!IS_ERR_OR_NULL(folio))
next prev parent reply other threads:[~2023-05-03 15:48 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 ` Matthew Wilcox [this message]
2023-05-03 15:49 ` [PATCH 1/2] filemap: fix the conditional folio_put in filemap_fault Christoph Hellwig
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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