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mm/gup: Replace ACCESS_ONCE with READ_ONCE
authorChristian Borntraeger <borntraeger@de.ibm.com>
Tue, 6 Jan 2015 21:54:46 +0000 (22:54 +0100)
committerChristian Borntraeger <borntraeger@de.ibm.com>
Mon, 19 Jan 2015 13:14:21 +0000 (14:14 +0100)
commit38c5ce936a0862a6ce2c8d1c72689a3aba301425
tree1cfaa35163f8a50723fc73b9f7763e23c13ce923tree
parentbccec2a0a25206cb837e939adab94768a990ffa9commit | diff
mm/gup: Replace ACCESS_ONCE with READ_ONCE

ACCESS_ONCE does not work reliably on non-scalar types. For
example gcc 4.6 and 4.7 might remove the volatile tag for such
accesses during the SRA (scalar replacement of aggregates) step
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145)

Fixup gup_pmd_range.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
mm/gup.c diff | blob | blame | history
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