[PATCH] mm: mm_init set_mm_counters

How is anon_rss initialized?  In dup_mmap, and by mm_alloc's memset; but
that's not so good if an mm_counter_t is a special type.  And how is rss
initialized?  By set_mm_counter, all over the place.  Come on, we just need to
initialize them both at once by set_mm_counter in mm_init (which follows the
memcpy when forking).

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index e2ff11f8c1b0..25caa02e2eac 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -198,8 +198,6 @@ static inline int dup_mmap(struct mm_struct * mm, struct mm_struct * oldmm)
         mm->free_area_cache = oldmm->mmap_base;
         mm->cached_hole_size = ~0UL;
         mm->map_count = 0;
-        set_mm_counter(mm, rss, 0);
-        set_mm_counter(mm, anon_rss, 0);
         cpus_clear(mm->cpu_vm_mask);
         mm->mm_rb = RB_ROOT;
         rb_link = &mm->mm_rb.rb_node;
@@ -323,6 +321,8 @@ static struct mm_struct * mm_init(struct mm_struct * mm)
         INIT_LIST_HEAD(&mm->mmlist);
         mm->core_waiters = 0;
         mm->nr_ptes = 0;
+        set_mm_counter(mm, rss, 0);
+        set_mm_counter(mm, anon_rss, 0);
         spin_lock_init(&mm->page_table_lock);
         rwlock_init(&mm->ioctx_list_lock);
         mm->ioctx_list = NULL;