staging: ramster: fix build warnings

Fix build warnings resulting from in-progress work that was
not entirely ifdef'd out.

Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 86e19d6..a09dd5c 100644 (file)
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -449,16 +449,18 @@ static struct page *zcache_alloc_page(void)
        return page;
 }
 
+#ifdef FRONTSWAP_HAS_UNUSE
 static void zcache_unacct_page(void)
 {
        zcache_pageframes_freed =
                atomic_inc_return(&zcache_pageframes_freed_atomic);
 }
+#endif
 
 static void zcache_free_page(struct page *page)
 {
        long curr_pageframes;
-       static long max_pageframes, min_pageframes, total_freed;
+       static long max_pageframes, min_pageframes;
 
        if (page == NULL)
                BUG();
@@ -965,9 +967,10 @@ out:
        return page;
 }
 
+#ifdef FRONTSWAP_HAS_UNUSE
 static void unswiz(struct tmem_oid oid, u32 index,
                                unsigned *type, pgoff_t *offset);
-#ifdef FRONTSWAP_HAS_UNUSE
+
 /*
  *  Choose an LRU persistent pageframe and attempt to "unuse" it by
  *  calling frontswap_unuse on both zpages.
@@ -1060,7 +1063,9 @@ static int shrink_zcache_memory(struct shrinker *shrink,
        int nr_evict = 0;
        int nr_unuse = 0;
        struct page *page;
+#ifdef FRONTSWAP_HAS_UNUSE
        int unuse_ret;
+#endif
 
        if (nr <= 0)
                goto skip_evict;
@@ -1519,6 +1524,7 @@ static inline struct tmem_oid oswiz(unsigned type, u32 ind)
        return oid;
 }
 
+#ifdef FRONTSWAP_HAS_UNUSE
 static void unswiz(struct tmem_oid oid, u32 index,
                                unsigned *type, pgoff_t *offset)
 {
@@ -1526,6 +1532,7 @@ static void unswiz(struct tmem_oid oid, u32 index,
        *offset = (pgoff_t)((index << SWIZ_BITS) |
                        (oid.oid[0] & SWIZ_MASK));
 }
+#endif
 
 static int zcache_frontswap_put_page(unsigned type, pgoff_t offset,
                                        struct page *page)
@@ -1535,7 +1542,6 @@ static int zcache_frontswap_put_page(unsigned type, pgoff_t offset,
        struct tmem_oid oid = oswiz(type, ind);
        int ret = -1;
        unsigned long flags;
-       int unuse_ret;
 
        BUG_ON(!PageLocked(page));
        if (!disable_frontswap_ignore_nonactive && !PageWasActive(page)) {