s390/kvm: REPLACE barrier fixup 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)

Commit 1365039d0c ("KVM: s390: Fix ipte locking") replace
ACCESS_ONCE with barriers. Lets use READ_ONCE instead.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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This commit is contained in:

Christian Borntraeger 2014-11-25 13:17:34 +01:00

parent 488beef144

commit 5de72a2247

1 changed files with 6 additions and 12 deletions

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arch/s390/kvm/gaccess.c

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