diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-07-22 03:06:21 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-22 03:06:21 -0400 |
| commit | 76c3bb15d6786a0b8da0ad0090e0c9c3672fc08b (patch) | |
| tree | 3824e008db9d554229a70c85fbbc13238276bd7a /include/asm-sparc64/pil.h | |
| parent | 7be42004065ce4df193aeef5befd26805267d0d9 (diff) | |
| parent | 93ded9b8fd42abe2c3607097963d8de6ad9117eb (diff) | |
Merge branch 'linus' into x86/x2apic
Diffstat (limited to 'include/asm-sparc64/pil.h')
| -rw-r--r-- | include/asm-sparc64/pil.h | 22 |
1 files changed, 1 insertions, 21 deletions
diff --git a/include/asm-sparc64/pil.h b/include/asm-sparc64/pil.h index eaac842d88c3..d805f33f1e0f 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) */ | ||