13b130069dcc36e3 author Chris Metcalf 1298924560 -0500 committer Chris Metcalf 1299014448 -0500 arch/tile: use a cleaner technique to enable interrupt for cpu_idle() Previously we used iret to atomically return to kernel PL with interrupts enabled. However, it turns out that we are architecturally guaranteed that we can just set and clear the "interrupt critical section" and only interrupt on the following instruction, so we now do that instead, since it's cleaner. Signed-off-by: Chris Metcalf ?ۅ$x