X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fhardirq.h;h=8d302298a161941ce40c6ed47411627d5f0229f8;hb=2e824ad59f678a1ff920144fda9b7dd0815fc010;hp=7803014f3a11bae4f353e7b042c0e1835997c7be;hpb=b0138a6cb7923a997d278b47c176778534d1095b;p=linux-2.6

diff --git a/include/linux/hardirq.h b/include/linux/hardirq.h
index 7803014f3a..8d302298a1 100644
--- a/include/linux/hardirq.h
+++ b/include/linux/hardirq.h
@@ -78,6 +78,19 @@
 # define in_atomic()	((preempt_count() & ~PREEMPT_ACTIVE) != 0)
 #endif
 
+#ifdef CONFIG_PREEMPT
+# define PREEMPT_CHECK_OFFSET 1
+#else
+# define PREEMPT_CHECK_OFFSET 0
+#endif
+
+/*
+ * Check whether we were atomic before we did preempt_disable():
+ * (used by the scheduler)
+ */
+#define in_atomic_preempt_off() \
+		((preempt_count() & ~PREEMPT_ACTIVE) != PREEMPT_CHECK_OFFSET)
+
 #ifdef CONFIG_PREEMPT
 # define preemptible()	(preempt_count() == 0 && !irqs_disabled())
 # define IRQ_EXIT_OFFSET (HARDIRQ_OFFSET-1)