It seems that linux/preempt.h needs to include linux/thread_info.h
in order to access current_thread_info(), which is used in
preempt_count().
I guess that all callers of preempt_count() must include
both linux/thread_info.h and linux/preempt.h directly or indirectly,
as this does not cause a compile error. I noticed the problem while
working on an unrelated issue in xen-land.
Signed-off-by: Simon Horman <[email protected]>
Index: linux-2.6/include/linux/preempt.h
===================================================================
--- linux-2.6.orig/include/linux/preempt.h 2006-12-27 16:58:46.000000000 +0900
+++ linux-2.6/include/linux/preempt.h 2006-12-27 17:13:12.000000000 +0900
@@ -8,6 +8,7 @@
#include <linux/thread_info.h>
#include <linux/linkage.h>
+#include <linux/thread_info.h>
#ifdef CONFIG_DEBUG_PREEMPT
extern void fastcall add_preempt_count(int val);
-
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