kernel/futex.c: make 3 functions static

The following functions can now become static again:
- get_futex_key()
- get_futex_key_refs()
- drop_futex_key_refs()

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

2 files changed, 4 insertions, 11 deletions

diff --git a/include/linux/futex.h b/include/linux/futex.h
index 99650353adfa..92d420fe03f8 100644
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -149,10 +149,6 @@ union futex_key {
                 int offset;
         } both;
 };
-int get_futex_key(u32 __user *uaddr, struct rw_semaphore *shared,
-                  union futex_key *key);
-void get_futex_key_refs(union futex_key *key);
-void drop_futex_key_refs(union futex_key *key);
 
 #ifdef CONFIG_FUTEX
 extern void exit_robust_list(struct task_struct *curr);
diff --git a/kernel/futex.c b/kernel/futex.c
index 32710451dc20..9dc591ab681a 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -181,8 +181,8 @@ static inline int match_futex(union futex_key *key1, union futex_key *key2)
  * For other futexes, it points to &current->mm->mmap_sem and
  * caller must have taken the reader lock. but NOT any spinlocks.
  */
-int get_futex_key(u32 __user *uaddr, struct rw_semaphore *fshared,
-                  union futex_key *key)
+static int get_futex_key(u32 __user *uaddr, struct rw_semaphore *fshared,
+                         union futex_key *key)
 {
         unsigned long address = (unsigned long)uaddr;
         struct mm_struct *mm = current->mm;
@@ -268,14 +268,13 @@ int get_futex_key(u32 __user *uaddr, struct rw_semaphore *fshared,
         }
         return err;
 }
-EXPORT_SYMBOL_GPL(get_futex_key);
 
 /*
  * Take a reference to the resource addressed by a key.
  * Can be called while holding spinlocks.
  *
  */
-inline void get_futex_key_refs(union futex_key *key)
+static void get_futex_key_refs(union futex_key *key)
 {
         if (key->both.ptr == 0)
                 return;
@@ -288,13 +287,12 @@ inline void get_futex_key_refs(union futex_key *key)
                         break;
         }
 }
-EXPORT_SYMBOL_GPL(get_futex_key_refs);
 
 /*
  * Drop a reference to the resource addressed by a key.
  * The hash bucket spinlock must not be held.
  */
-void drop_futex_key_refs(union futex_key *key)
+static void drop_futex_key_refs(union futex_key *key)
 {
         if (!key->both.ptr)
                 return;
@@ -307,7 +305,6 @@ void drop_futex_key_refs(union futex_key *key)
                         break;
         }
 }
-EXPORT_SYMBOL_GPL(drop_futex_key_refs);
 
 static u32 cmpxchg_futex_value_locked(u32 __user *uaddr, u32 uval, u32 newval)
 {