fs/exec.c:acct_arg_size(): ptl is no longer needed for add_mm_counter()

acct_arg_size() takes ->page_table_lock around add_mm_counter() if
!SPLIT_RSS_COUNTING.  This is not needed after commit 172703b08cd0 ("mm:
delete non-atomic mm counter implementation").

Signed-off-by: Oleg Nesterov <[email protected]>
Reviewed-by: Matt Fleming <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/fs/exec.c b/fs/exec.c
index 0e8e59939d09a72817c114a69ce40973331df31e..da80612a35f42e9bc1bb2d09fe79090e44b3808b 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -181,14 +181,7 @@ static void acct_arg_size(struct linux_binprm *bprm, unsigned long pages)
                return;
 
        bprm->vma_pages = pages;
-
-#ifdef SPLIT_RSS_COUNTING
-       add_mm_counter(mm, MM_ANONPAGES, diff);
-#else
-       spin_lock(&mm->page_table_lock);
        add_mm_counter(mm, MM_ANONPAGES, diff);
-       spin_unlock(&mm->page_table_lock);
-#endif
 }
 
 static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,