[PATCH] exec: remove page_table_lock for mm counters in acct_arg_size()

[Frantisek Hrbata <fhrbata@redhat.com>]

Commit 172703b mm: delete non-atomic mm counter implementation
removed non-atomic mm counters implementation. I think there is no need to hold
page_table_lock for add_mm_counter() when the splitted page table locks are not
used. This patch removes the locking.

Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
---
 fs/exec.c |    6 ------
 1 files changed, 0 insertions(+), 6 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index 6075a1e..e6fc5e1 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -182,13 +182,7 @@ static void acct_arg_size(struct linux_binprm *bprm, unsigned long pages)
 
 	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,
-- 
1.7.4.4