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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>
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@ -35,8 +35,8 @@
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*
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* The basic atomic operation of this list is cmpxchg on long. On
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* architectures that don't have NMI-safe cmpxchg implementation, the
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* list can NOT be used in NMI handler. So code uses the list in NMI
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* handler should depend on CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
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* list can NOT be used in NMI handlers. So code that uses the list in
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* an NMI handler should depend on CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
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*
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* Copyright 2010,2011 Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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@ -147,10 +147,6 @@ static inline void llist_add(struct llist_node *new, struct llist_head *head)
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{
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struct llist_node *entry, *old_entry;
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#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
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BUG_ON(in_nmi());
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#endif
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entry = head->first;
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do {
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old_entry = entry;
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@ -169,10 +165,6 @@ static inline void llist_add(struct llist_node *new, struct llist_head *head)
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*/
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static inline struct llist_node *llist_del_all(struct llist_head *head)
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{
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#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
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BUG_ON(in_nmi());
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#endif
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return xchg(&head->first, NULL);
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}
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#endif /* LLIST_H */
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12
lib/llist.c
12
lib/llist.c
@ -3,8 +3,8 @@
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*
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* The basic atomic operation of this list is cmpxchg on long. On
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* architectures that don't have NMI-safe cmpxchg implementation, the
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* list can NOT be used in NMI handler. So code uses the list in NMI
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* handler should depend on CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
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* list can NOT be used in NMI handlers. So code that uses the list in
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* an NMI handler should depend on CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
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*
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* Copyright 2010,2011 Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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@ -40,10 +40,6 @@ void llist_add_batch(struct llist_node *new_first, struct llist_node *new_last,
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{
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struct llist_node *entry, *old_entry;
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#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
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BUG_ON(in_nmi());
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#endif
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entry = head->first;
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do {
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old_entry = entry;
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@ -71,10 +67,6 @@ struct llist_node *llist_del_first(struct llist_head *head)
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{
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struct llist_node *entry, *old_entry, *next;
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#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
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BUG_ON(in_nmi());
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#endif
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entry = head->first;
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do {
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if (entry == NULL)
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