mm: thp: correct split_huge_pages file permission

split_huge_pages doesn't support get method at all, so the read
permission sounds confusing, change the permission to write only.

And, add "\n" to the output of set method to make it more readable.

Signed-off-by: Yang Shi <yang.shi@linaro.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index df67b53ae3c53423b8f3065093a6e65f90dbafb7..f7daa7de8f4867dc871edb8ea3a1ec6189e4d54f 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3452,7 +3452,7 @@ next:
                }
        }
 
-       pr_info("%lu of %lu THP split", split, total);
+       pr_info("%lu of %lu THP split\n", split, total);
 
        return 0;
 }
@@ -3463,7 +3463,7 @@ static int __init split_huge_pages_debugfs(void)
 {
        void *ret;
 
-       ret = debugfs_create_file("split_huge_pages", 0644, NULL, NULL,
+       ret = debugfs_create_file("split_huge_pages", 0200, NULL, NULL,
                        &split_huge_pages_fops);
        if (!ret)
                pr_warn("Failed to create split_huge_pages in debugfs");