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Revision 1.4, Mon Aug 4 17:03:13 2008 UTC (9 years, 2 months ago) by lachlan.longdrop.melbourne.sgi.com
Branch: MAIN
Changes since 1.3: +0 -8 lines 

Merge up to 2.6.26
Merge of 2.6.x-xfs-melb:linux:31804b by kenmcd.

#ifndef _SPARC64_PIL_H
#define _SPARC64_PIL_H

/* To avoid some locking problems, we hard allocate certain PILs
 * for SMP cross call messages that must do a etrap/rtrap.
 *
 * A local_irq_disable() does not block the cross call delivery, so
 * when SMP locking is an issue we reschedule the event into a PIL
 * interrupt which is blocked by local_irq_disable().
 *
 * In fact any XCALL which has to etrap/rtrap has a problem because
 * it is difficult to prevent rtrap from running BH's, and that would
 * need to be done if the XCALL arrived while %pil==15.
 */
#define PIL_SMP_CALL_FUNC	1
#define PIL_SMP_RECEIVE_SIGNAL	2
#define PIL_SMP_CAPTURE		3
#define PIL_SMP_CTX_NEW_VERSION	4
#define PIL_DEVICE_IRQ		5

#endif /* !(_SPARC64_PIL_H) */