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authorPaolo Bonzini <pbonzini@redhat.com>2016-06-09 13:06:08 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2016-08-04 13:52:21 +0200
commit3aed64f6d341cdb62bb2d6232589fb13448ce063 (patch)
tree33c7906993c84a861d4575a19a667bb5d8749046 /include
parent96b585267f552d4b6a28ea8bd75e5ed03deb6e71 (diff)
pvclock: introduce seqcount-like API
The version field in struct pvclock_vcpu_time_info basically implements a seqcount. Wrap it with the usual read_begin and read_retry functions, and use these APIs instead of peppering the code with smp_rmb()s. While at it, change it to the more pedantically correct virt_rmb(). With this change, __pvclock_read_cycles can be simplified noticeably. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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