4 files changed, 19 insertions, 64 deletions

diff --git a/lib/Kconfig b/lib/Kconfig
index 6c695ff9caba..32f3e5ae2be5 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -276,7 +276,4 @@ config CORDIC
           so its calculations are in fixed point. Modules can select this
           when they require this function. Module will be called cordic.
 
-config LLIST
-        bool
-
 endmenu
diff --git a/lib/Makefile b/lib/Makefile
index 3f5bc6d903e0..a4da283f5dc0 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -22,7 +22,7 @@ lib-y	+= kobject.o kref.o klist.o
 obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
          bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
          string_helpers.o gcd.o lcm.o list_sort.o uuid.o flex_array.o \
-         bsearch.o find_last_bit.o find_next_bit.o
+         bsearch.o find_last_bit.o find_next_bit.o llist.o
 obj-y += kstrtox.o
 obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
 
@@ -115,8 +115,6 @@ obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o
 
 obj-$(CONFIG_CORDIC) += cordic.o
 
-obj-$(CONFIG_LLIST) += llist.o
-
 hostprogs-y     := gen_crc32table
 clean-files     := crc32table.h
 
diff --git a/lib/llist.c b/lib/llist.c
index da445724fa1f..700cff77a387 100644
--- a/lib/llist.c
+++ b/lib/llist.c
@@ -3,8 +3,8 @@
  *
  * 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>
@@ -30,48 +30,28 @@
 #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
  * @head:       the head for your lock-less list
+ *
+ * Return whether list is empty before adding.
  */
-void llist_add_batch(struct llist_node *new_first, struct llist_node *new_last,
+bool llist_add_batch(struct llist_node *new_first, struct llist_node *new_last,
                      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 {
+        for (;;) {
                 old_entry = entry;
                 new_last->next = entry;
-                cpu_relax();
-        } while ((entry = cmpxchg(&head->first, old_entry, new_first)) != old_entry);
+                entry = cmpxchg(&head->first, old_entry, new_first);
+                if (entry == old_entry)
+                        break;
+        }
+
+        return old_entry == NULL;
 }
 EXPORT_SYMBOL_GPL(llist_add_batch);
 
@@ -93,37 +73,17 @@ struct llist_node *llist_del_first(struct llist_head *head)
 {
         struct llist_node *entry, *old_entry, *next;
 
-#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
-        BUG_ON(in_nmi());
-#endif
-
         entry = head->first;
-        do {
+        for (;;) {
                 if (entry == NULL)
                         return NULL;
                 old_entry = entry;
                 next = entry->next;
-                cpu_relax();
-        } while ((entry = cmpxchg(&head->first, old_entry, next)) != old_entry);
+                entry = cmpxchg(&head->first, old_entry, next);
+                if (entry == old_entry)
+                        break;
+        }
 
         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);
diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c
index 4689cb073da4..503f087382a4 100644
--- a/lib/smp_processor_id.c
+++ b/lib/smp_processor_id.c
@@ -22,7 +22,7 @@ notrace unsigned int debug_smp_processor_id(void)
          * Kernel threads bound to a single CPU can safely use
          * smp_processor_id():
          */
-        if (cpumask_equal(&current->cpus_allowed, cpumask_of(this_cpu)))
+        if (cpumask_equal(tsk_cpus_allowed(current), cpumask_of(this_cpu)))
                 goto out;
 
         /*