From: Matthew Wilcox <willy@infradead.org>
To: Mike Rapoport <rppt@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
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Matthew Garrett <mjg59@srcf.ucam.org>,
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x86@kernel.org, kernel test robot <oliver.sang@intel.com>
Subject: Re: [PATCH v3 2/2] secretmem: optimize page_is_secretmem()
Date: Fri, 7 May 2021 16:01:44 +0100 [thread overview]
Message-ID: <YJVWWFrvTzC2M0ba@casper.infradead.org> (raw)
In-Reply-To: <20210420150049.14031-3-rppt@kernel.org>
On Tue, Apr 20, 2021 at 06:00:49PM +0300, Mike Rapoport wrote:
> + mapping = (struct address_space *)
> + ((unsigned long)page->mapping & ~PAGE_MAPPING_FLAGS);
> +
> + if (mapping != page->mapping)
> + return false;
> +
> + return page->mapping->a_ops == &secretmem_aops;
... why do you go back to page->mapping here?
return mapping->a_ops == &secretmem_aops
prev parent reply other threads:[~2021-05-07 15:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-20 15:00 [PATCH v3 0/2] secretmem: optimize page_is_secretmem() Mike Rapoport
2021-04-20 15:00 ` [PATCH v3 1/2] secretmem/gup: don't check if page is secretmem without reference Mike Rapoport
2021-04-20 15:17 ` David Hildenbrand
2021-04-20 15:00 ` [PATCH v3 2/2] secretmem: optimize page_is_secretmem() Mike Rapoport
2021-05-07 15:01 ` Matthew Wilcox [this message]
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