[patch] warn on release_region() from irq context

[Ingo Molnar <mingo@elte.hu>]

it is not legal to call release_region() from hardirq/softirq context.  
Add a WARN_ON() so that we find such cases.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

----

 kernel/resource.c |    3 +++
 1 files changed, 3 insertions(+)

Index: linux/kernel/resource.c
===================================================================
--- linux.orig/kernel/resource.c
+++ linux/kernel/resource.c
@@ -18,6 +18,7 @@
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/interrupt.h>
 #include <asm/io.h>
 
 
@@ -486,6 +487,8 @@ void __release_region(struct resource *p
 	struct resource **p;
 	unsigned long end;
 
+	WARN_ON(in_interrupt());
+
 	p = &parent->child;
 	end = start + n - 1;