block: remove unrelated header files and export symbol

Fix up the following items:

 - remove unrelated header files.
 - export interface function.
 - modify function cmdline_parts_parse return value, this will make
   it more friendly for the caller.

Signed-off-by: CaiZhiyong <caizhiyong@huawei.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
CC: Brian Norris <computersforpeace@gmail.com>
Cc: "Wanglin (Albert)" <albert.wanglin@hisilicon.com>
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Karel Zak <kzak@redhat.com>
Cc: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2 files changed, 15 insertions, 11 deletions

diff --git a/block/cmdline-parser.c b/block/cmdline-parser.c
index cc2637f8674e..9dbc67e42a99 100644
--- a/block/cmdline-parser.c
+++ b/block/cmdline-parser.c
@@ -4,8 +4,7 @@
  * Written by Cai Zhiyong <caizhiyong@huawei.com>
  *
  */
-#include <linux/buffer_head.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/cmdline-parser.h>
 
 static int parse_subpart(struct cmdline_subpart **subpart, char *partdef)
@@ -159,6 +158,7 @@ void cmdline_parts_free(struct cmdline_parts **parts)
                 *parts = next_parts;
         }
 }
+EXPORT_SYMBOL(cmdline_parts_free);
 
 int cmdline_parts_parse(struct cmdline_parts **parts, const char *cmdline)
 {
@@ -206,6 +206,7 @@ fail:
         cmdline_parts_free(parts);
         goto done;
 }
+EXPORT_SYMBOL(cmdline_parts_parse);
 
 struct cmdline_parts *cmdline_parts_find(struct cmdline_parts *parts,
                                          const char *bdev)
@@ -214,17 +215,17 @@ struct cmdline_parts *cmdline_parts_find(struct cmdline_parts *parts,
                 parts = parts->next_parts;
         return parts;
 }
+EXPORT_SYMBOL(cmdline_parts_find);
 
 /*
  *  add_part()
  *    0 success.
  *    1 can not add so many partitions.
  */
-void cmdline_parts_set(struct cmdline_parts *parts, sector_t disk_size,
-                       int slot,
-                       int (*add_part)(int, struct cmdline_subpart *, void *),
-                       void *param)
-
+int cmdline_parts_set(struct cmdline_parts *parts, sector_t disk_size,
+                      int slot,
+                      int (*add_part)(int, struct cmdline_subpart *, void *),
+                      void *param)
 {
         sector_t from = 0;
         struct cmdline_subpart *subpart;
@@ -247,4 +248,7 @@ void cmdline_parts_set(struct cmdline_parts *parts, sector_t disk_size,
                 if (add_part(slot, subpart, param))
                         break;
         }
+
+        return slot;
 }
+EXPORT_SYMBOL(cmdline_parts_set);
diff --git a/include/linux/cmdline-parser.h b/include/linux/cmdline-parser.h
index a0f9280421ec..2e6dce6e5c2a 100644
--- a/include/linux/cmdline-parser.h
+++ b/include/linux/cmdline-parser.h
@@ -37,9 +37,9 @@ int cmdline_parts_parse(struct cmdline_parts **parts, const char *cmdline);
 struct cmdline_parts *cmdline_parts_find(struct cmdline_parts *parts,
                                          const char *bdev);
 
-void cmdline_parts_set(struct cmdline_parts *parts, sector_t disk_size,
-                       int slot,
-                       int (*add_part)(int, struct cmdline_subpart *, void *),
-                       void *param);
+int cmdline_parts_set(struct cmdline_parts *parts, sector_t disk_size,
+                      int slot,
+                      int (*add_part)(int, struct cmdline_subpart *, void *),
+                      void *param);
 
 #endif /* CMDLINEPARSEH */