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-rw-r--r--include/asm-sparc64/pil.h22
1 files changed, 1 insertions, 21 deletions
diff --git a/include/asm-sparc64/pil.h b/include/asm-sparc64/pil.h
index eaac842d88c..d805f33f1e0 100644
--- a/include/asm-sparc64/pil.h
+++ b/include/asm-sparc64/pil.h
@@ -1,21 +1 @@
1#ifndef _SPARC64_PIL_H #include <asm-sparc/pil.h>
2#define _SPARC64_PIL_H
3
4/* To avoid some locking problems, we hard allocate certain PILs
5 * for SMP cross call messages that must do a etrap/rtrap.
6 *
7 * A local_irq_disable() does not block the cross call delivery, so
8 * when SMP locking is an issue we reschedule the event into a PIL
9 * interrupt which is blocked by local_irq_disable().
10 *
11 * In fact any XCALL which has to etrap/rtrap has a problem because
12 * it is difficult to prevent rtrap from running BH's, and that would
13 * need to be done if the XCALL arrived while %pil==15.
14 */
15#define PIL_SMP_CALL_FUNC 1
16#define PIL_SMP_RECEIVE_SIGNAL 2
17#define PIL_SMP_CAPTURE 3
18#define PIL_SMP_CTX_NEW_VERSION 4
19#define PIL_DEVICE_IRQ 5
20
21#endif /* !(_SPARC64_PIL_H) */