binder: add barrier before enable preemption
"get_user" & "put_user" have a short piece of instructions, and without the barrier compiler will optimize (i.e. delete) the "enable preemption". Change-Id: Ice55a28ca0e38ea88127eb6dc35bf99a877bbbc7 Signed-off-by:Yi-wei Zhao <gbjc64@motorola.com> Reviewed-on: http://gerrit.mot.com/857889 SME-Granted: SME Approvals Granted SLTApproved: Slta Waiver <sltawvr@motorola.com> Tested-by:
Jira Key <jirakey@motorola.com> Submit-Approved: Jira Key <jirakey@motorola.com>
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