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ppc/hugetlbfs: Replace ACCESS_ONCE with READ_ONCE
authorChristian Borntraeger <borntraeger@de.ibm.com>
Tue, 6 Jan 2015 21:47:41 +0000 (22:47 +0100)
committerChristian Borntraeger <borntraeger@de.ibm.com>
Mon, 19 Jan 2015 13:14:19 +0000 (14:14 +0100)
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)

Change the ppc/hugetlbfs code to replace ACCESS_ONCE with READ_ONCE.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
arch/powerpc/mm/hugetlbpage.c patch | blob | history

diff --cc arch/powerpc/mm/hugetlbpage.c
Simple merge
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