mm/gup: Replace ACCESS_ONCE with READ_ONCE

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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>

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Christian Borntraeger 2015-01-06 22:54:46 +01:00

parent bccec2a0a2

commit 38c5ce936a

1 changed files with 1 additions and 1 deletions

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mm/gup.c

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