llist: Remove the platform-dependent NMI checks
Remove the nmi() checks spread around the code. in_nmi() is not available
on every architecture and it's a pretty obscure and ugly check in any case.
Cc: Huang Ying <ying.huang@intel.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1315461646-1379-3-git-send-email-ying.huang@intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/llist.h b/include/linux/llist.h
index 3eccdfd..65fca1c 100644
--- a/include/linux/llist.h
+++ b/include/linux/llist.h
@@ -35,8 +35,8 @@
*
* The basic atomic operation of this list is cmpxchg on long. On
* architectures that don't have NMI-safe cmpxchg implementation, the
- * list can NOT be used in NMI handler. So code uses the list in NMI
- * handler should depend on CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
+ * list can NOT be used in NMI handlers. So code that uses the list in
+ * an NMI handler should depend on CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
*
* Copyright 2010,2011 Intel Corp.
* Author: Huang Ying <ying.huang@intel.com>
@@ -147,10 +147,6 @@
{
struct llist_node *entry, *old_entry;
-#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
- BUG_ON(in_nmi());
-#endif
-
entry = head->first;
do {
old_entry = entry;
@@ -169,10 +165,6 @@
*/
static inline struct llist_node *llist_del_all(struct llist_head *head)
{
-#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
- BUG_ON(in_nmi());
-#endif
-
return xchg(&head->first, NULL);
}
#endif /* LLIST_H */