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由 J. Bruce Fields 提交于
The return-value convention for these functions varies depending on whether they're interruptible or can timeout. It can be a little confusing--document it. Signed-off-by: NJ. Bruce Fields <bfields@redhat.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111006192246.GB28026@fieldses.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>
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