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authorChristian Borntraeger <borntraeger@de.ibm.com>2014-11-21 18:29:40 +0300
committerChristian Borntraeger <borntraeger@de.ibm.com>2014-12-18 11:54:38 +0300
commit14cf3d977b80f5e355f8ac7547cf1b9ff9fb3e09 (patch)
tree26dff7a852d6e5c5f48c55404662c67cd94c604b /ipc/util.c
parent4f9d1382e6f80dcfa891b2c02d5a35c53be485f1 (diff)
downloadlinux-14cf3d977b80f5e355f8ac7547cf1b9ff9fb3e09.tar.xz
x86/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>
Diffstat (limited to 'ipc/util.c')
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