From: Wu Fengguang <fengguang.wu@intel.com>
Date: Wed, 26 Nov 2008 06:35:22 +0000 (+0800)
Subject: ACPI: don't cond_resched() when irqs_disabled()
X-Git-Url: http://git.maemo.org/git/?p=h-e-n;a=commitdiff_plain;h=abe1dfab60e1839d115930286cb421f5a5b193f3

ACPI: don't cond_resched() when irqs_disabled()

The ACPI interpreter usually runs with irqs enabled.
However, during suspend/resume it runs with
irqs disabled to evaluate _GTS/_BFS, as well as
by irqrouter_resume() which evaluates _CRS, _PRS, _SRS.

http://bugzilla.kernel.org/show_bug.cgi?id=12252

Signed-off-by: Wu Fengguang <wfg@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---

diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index 029c8c0..0515e75 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -141,6 +141,10 @@ static inline void *acpi_os_acquire_object(acpi_cache_t * cache)
 /*
  * We need to show where it is safe to preempt execution of ACPICA
  */
-#define ACPI_PREEMPTION_POINT()	cond_resched()
+#define ACPI_PREEMPTION_POINT()		\
+	do {				\
+		if (!irqs_disabled())	\
+			cond_resched();	\
+	} while (0)
 
 #endif				/* __ACLINUX_H__ */