memory-failure: change type of action_result's param 3 to enum

Change type of action_result's param 3 to enum for type consistency,
and rename mf_outcome to mf_result for clearly.

Signed-off-by: Xie XiuQi <[e-mail]>
Acked-by: Naoya Horiguchi <[e-mail]>
Cc: Chen Gong <[e-mail]>
Cc: Jim Davis <[e-mail]>
Cc: Steven Rostedt <[e-mail]>
Cc: Tony Luck <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/linux/mm.h

···
 /*
  * Error handlers for various types of pages.
  */
-enum mf_outcome {
+enum mf_result {
 	MF_IGNORED,	/* Error: cannot be handled */
 	MF_FAILED,	/* Error: handling failed */
 	MF_DELAYED,	/* Will be handled later */

mm/memory-failure.c

···
  * "Dirty/Clean" indication is not 100% accurate due to the possibility of
  * setting PG_dirty outside page lock. See also comment above set_page_dirty().
  */
-static void action_result(unsigned long pfn, enum mf_action_page_type type, int result)
+static void action_result(unsigned long pfn, enum mf_action_page_type type,
+			  enum mf_result result)
 {
 	pr_err("MCE %#lx: recovery action for %s: %s\n",
 		pfn, action_page_types[type], action_name[result]);