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(parent: b2b113c) | patch
mips/gup: Replace ACCESS_ONCE with READ_ONCE
authorChristian Borntraeger <borntraeger@de.ibm.com>
Fri, 21 Nov 2014 15:21:56 +0000 (16:21 +0100)
committerChristian Borntraeger <borntraeger@de.ibm.com>
Thu, 18 Dec 2014 08:54:39 +0000 (09:54 +0100)
commit0cc2728b7f6be8006f62ef5c3d544337ef68b940
tree36f63ef018f6842f91b2118240cc6a144ef52571tree | snapshot
parentb2b113cb7af28847967974f563a833ab9c0f1320commit | diff
mips/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)

Change the gup code to replace ACCESS_ONCE with READ_ONCE.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
arch/mips/mm/gup.c diff | blob | history
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