From: David Miller <davem@davemloft.net>
To: zi.yan@sent.com
Cc: sam@ravnborg.org, linux-kernel@vger.kernel.org,
sparclinux@vger.kernel.org, zi.yan@cs.rutgers.edu
Subject: Re: [PATCH] mm: add pmd_t initializer __pmd() to work around a GCC bug.
Date: Thu, 10 Aug 2017 15:04:58 -0700 (PDT) [thread overview]
Message-ID: <20170810.150458.937727046893542981.davem@davemloft.net> (raw)
In-Reply-To: <20170803131721.74011-1-zi.yan@sent.com>
From: Zi Yan <zi.yan@sent.com>
Date: Thu, 3 Aug 2017 09:17:21 -0400
> From: Zi Yan <zi.yan@cs.rutgers.edu>
>
> THP migration is added but only supports x86_64 at the moment. For all
> other architectures, swp_entry_to_pmd() only returns a zero pmd_t.
>
> Due to a GCC zero initializer bug #53119, the standard (pmd_t){0}
> initializer is not accepted by all GCC versions. __pmd() is a feasible
> workaround. In addition, sparc32's pmd_t is an array instead of a single
> value, so we need (pmd_t){ {0}, } instead of (pmd_t){0}. Thus,
> a different __pmd() definition is needed in sparc32.
>
> Signed-off-by: Zi Yan <zi.yan@cs.rutgers.edu>
Applied.
prev parent reply other threads:[~2017-08-10 22:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-03 13:17 Zi Yan
2017-08-10 14:46 ` Zi Yan
2017-08-10 16:28 ` David Miller
2017-08-10 16:40 ` Zi Yan
2017-08-10 22:04 ` David Miller [this message]
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