4 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-xtensa/atomic.h b/include/asm-xtensa/atomic.h
index 12b5732dc6e5..3670cc7695da 100644
--- a/include/asm-xtensa/atomic.h
+++ b/include/asm-xtensa/atomic.h
@@ -223,6 +223,26 @@ static inline int atomic_sub_return(int i, atomic_t * v)
  */
 #define atomic_add_negative(i,v) (atomic_add_return((i),(v)) < 0)
 
+#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
+
+/**
+ * atomic_add_unless - add unless the number is a given value
+ * @v: pointer of type atomic_t
+ * @a: the amount to add to v...
+ * @u: ...unless v is equal to u.
+ *
+ * Atomically adds @a to @v, so long as it was not @u.
+ * Returns non-zero if @v was not @u, and zero otherwise.
+ */
+#define atomic_add_unless(v, a, u)				\
+({								\
+	int c, old;						\
+	c = atomic_read(v);					\
+	while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
+		c = old;					\
+	c != (u);						\
+})
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
 static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
 {
diff --git a/include/asm-xtensa/elf.h b/include/asm-xtensa/elf.h
index 64f1f53874fe..de0667453b2e 100644
--- a/include/asm-xtensa/elf.h
+++ b/include/asm-xtensa/elf.h
@@ -209,6 +209,8 @@ extern void xtensa_elf_core_copy_regs (xtensa_gregset_t *, struct pt_regs *);
 
 #define SET_PERSONALITY(ex, ibcs2) set_personality(PER_LINUX_32BIT)
 
+struct task_struct;
+
 extern void do_copy_regs (xtensa_gregset_t*, struct pt_regs*,
 			  struct task_struct*);
 extern void do_restore_regs (xtensa_gregset_t*, struct pt_regs*,
diff --git a/include/asm-xtensa/pgtable.h b/include/asm-xtensa/pgtable.h
index 987e3b802313..7b15afb70c56 100644
--- a/include/asm-xtensa/pgtable.h
+++ b/include/asm-xtensa/pgtable.h
@@ -278,6 +278,8 @@ static inline void update_pte(pte_t *ptep, pte_t pteval)
 #endif
 }
 
+struct mm_struct;
+
 static inline void
 set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pteval)
 {
@@ -294,6 +296,7 @@ set_pmd(pmd_t *pmdp, pmd_t pmdval)
 #endif
 }
 
+struct vm_area_struct;
 
 static inline int
 ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr,
diff --git a/include/asm-xtensa/semaphore.h b/include/asm-xtensa/semaphore.h
index 2a10e193b929..f10c3487cd4c 100644
--- a/include/asm-xtensa/semaphore.h
+++ b/include/asm-xtensa/semaphore.h
@@ -38,6 +38,7 @@ struct semaphore {
 static inline void sema_init (struct semaphore *sem, int val)
 {
 	atomic_set(&sem->count, val);
+	sem->sleepers = 0;
 	init_waitqueue_head(&sem->wait);
 }