[PATCH] Shut up warnings in ipc/shm.c

Fix two warnings in ipc/shm.c

ipc/shm.c:122: warning: statement with no effect
ipc/shm.c:560: warning: statement with no effect

by converting the macros to empty inline functions.  For safety, let's do
all three.  This also has the advantage that typechecking gets performed
even without CONFIG_SHMEM enabled.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 18 insertions, 3 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 6c9be99429f3..75ec04e2f184 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -634,9 +634,24 @@ struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
 int shmem_lock(struct file *file, int lock, struct user_struct *user);
 #else
 #define shmem_nopage filemap_nopage
-#define shmem_lock(a, b, c)     ({0;})  /* always in memory, no need to lock */
-#define shmem_set_policy(a, b)  (0)
-#define shmem_get_policy(a, b)  (NULL)
+
+static inline int shmem_lock(struct file *file, int lock,
+                             struct user_struct *user)
+{
+        return 0;
+}
+
+static inline int shmem_set_policy(struct vm_area_struct *vma,
+                                   struct mempolicy *new)
+{
+        return 0;
+}
+
+static inline struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
+                                                 unsigned long addr)
+{
+        return NULL;
+}
 #endif
 struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags);