From: David S. Miller <davem@davemloft.net>
Date: Fri, 25 Apr 2014 17:21:12 +0000 (-0700)
Subject: sparc64: Fix bugs in get_user_pages_fast() wrt. THP.
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~211^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04df419de34104d8818b8c5cffaa062fa36d20ea;p=pandora-kernel.git

sparc64: Fix bugs in get_user_pages_fast() wrt. THP.

The large PMD path needs to check _PAGE_VALID not _PAGE_PRESENT, to
decide if it needs to bail and return 0.

pmd_large() should therefore just check _PAGE_PMD_HUGE.

Calls to gup_huge_pmd() are guarded with a check of pmd_large(), so we
just need to add a valid bit check.

Signed-off-by: David S. Miller <davem@davemloft.net>
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