[PATCH] staging: zcache: fix compile error

[Bob Liu <lliubbo@gmail.com>]

Because 'ramster_debugfs_init' is not defined if !CONFIG_DEBUG_FS, there is
compile error like:

$ make drivers/staging/zcache/

staging/zcache/zbud.c:291:16: warning: a??zbud_pers_evicted_pageframesa?? defined
but not used [-Wunused-variable]
staging/zcache/ramster/ramster.c: In function a??ramster_inita??:
staging/zcache/ramster/ramster.c:981:2: error: implicit declaration of
function a??ramster_debugfs_inita?? [-Werror=implicit-function-declaration]

This patch fix it and reduce some #ifdef CONFIG_DEBUG_FS in .c files with the
same way.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
---
 drivers/staging/zcache/ramster/ramster.c |    4 ++++
 drivers/staging/zcache/zbud.c            |    6 ++++--
 drivers/staging/zcache/zcache-main.c     |    2 --
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/zcache/ramster/ramster.c b/drivers/staging/zcache/ramster/ramster.c
index 4f715c7..e562c14 100644
--- a/drivers/staging/zcache/ramster/ramster.c
+++ b/drivers/staging/zcache/ramster/ramster.c
@@ -134,6 +134,10 @@ static int ramster_debugfs_init(void)
 }
 #undef	zdebugfs
 #undef	zdfs64
+#else
+static int ramster_debugfs_init(void)
+{
+}
 #endif
 
 static LIST_HEAD(ramster_rem_op_list);
diff --git a/drivers/staging/zcache/zbud.c b/drivers/staging/zcache/zbud.c
index fdff5c6..2d38c96 100644
--- a/drivers/staging/zcache/zbud.c
+++ b/drivers/staging/zcache/zbud.c
@@ -342,6 +342,10 @@ static int zbud_debugfs_init(void)
 }
 #undef	zdfs
 #undef	zdfs64
+#else
+static int zbud_debugfs_init(void)
+{
+}
 #endif
 
 /* protects the buddied list and all unbuddied lists */
@@ -1051,9 +1055,7 @@ void zbud_init(void)
 {
 	int i;
 
-#ifdef CONFIG_DEBUG_FS
 	zbud_debugfs_init();
-#endif
 	BUG_ON((sizeof(struct tmem_handle) * 2 > CHUNK_SIZE));
 	BUG_ON(sizeof(struct zbudpage) > sizeof(struct page));
 	for (i = 0; i < NCHUNKS; i++) {
diff --git a/drivers/staging/zcache/zcache-main.c b/drivers/staging/zcache/zcache-main.c
index 4e52a94..ac75670 100644
--- a/drivers/staging/zcache/zcache-main.c
+++ b/drivers/staging/zcache/zcache-main.c
@@ -1753,9 +1753,7 @@ static int zcache_init(void)
 		namestr = "ramster";
 		ramster_register_pamops(&zcache_pamops);
 	}
-#ifdef CONFIG_DEBUG_FS
 	zcache_debugfs_init();
-#endif
 	if (zcache_enabled) {
 		unsigned int cpu;
 
-- 
1.7.10.4

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>