aboutsummaryrefslogtreecommitdiffstats
path: root/lib/llist.c
diff options
context:
space:
mode:
authorHuang Ying <ying.huang@intel.com>2011-09-08 14:00:42 +0800
committerIngo Molnar <mingo@elte.hu>2011-10-04 11:30:53 +0200
commit1230db8e1543c0471dd165727d34647ab098cc1e (patch)
tree6667af62e0a0bb24b315f5b9e61ea7635293135b /lib/llist.c
parent22f92bacbeea24b20e447444c28e7cad9f1ac3f8 (diff)
llist: Make some llist functions inline
Because llist code will be used in performance critical scheduler code path, make llist_add() and llist_del_all() inline to avoid function calling overhead and related 'glue' overhead. Signed-off-by: Huang Ying <ying.huang@intel.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1315461646-1379-2-git-send-email-ying.huang@intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'lib/llist.c')
-rw-r--r--lib/llist.c40
1 files changed, 0 insertions, 40 deletions
diff --git a/lib/llist.c b/lib/llist.c
index da445724fa1f..3e3fa9139c41 100644
--- a/lib/llist.c
+++ b/lib/llist.c
@@ -30,28 +30,6 @@
#include <asm/system.h>
/**
- * llist_add - add a new entry
- * @new: new entry to be added
- * @head: the head for your lock-less list
- */
-void llist_add(struct llist_node *new, struct llist_head *head)
-{
- 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;
- new->next = entry;
- cpu_relax();
- } while ((entry = cmpxchg(&head->first, old_entry, new)) != old_entry);
-}
-EXPORT_SYMBOL_GPL(llist_add);
-
-/**
* llist_add_batch - add several linked entries in batch
* @new_first: first entry in batch to be added
* @new_last: last entry in batch to be added
@@ -109,21 +87,3 @@ struct llist_node *llist_del_first(struct llist_head *head)
return entry;
}
EXPORT_SYMBOL_GPL(llist_del_first);
-
-/**
- * llist_del_all - delete all entries from lock-less list
- * @head: the head of lock-less list to delete all entries
- *
- * If list is empty, return NULL, otherwise, delete all entries and
- * return the pointer to the first entry. The order of entries
- * deleted is from the newest to the oldest added one.
- */
-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);
-}
-EXPORT_SYMBOL_GPL(llist_del_all);

Privacy Policy