mm: save some bytes in mm_struct by filling holes on 64bit

Save some bytes in mm_struct by filling holes

Putting int values together for better packing on 64bit shrinks sizeof(struct
mm_struct) from 776 bytes to 764 bytes.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index af190ceab971..29adaa781cb6 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -172,6 +172,7 @@ struct mm_struct {
         atomic_t mm_users;                      /* How many users with user space? */
         atomic_t mm_count;                      /* How many references to "struct mm_struct" (users count as 1) */
         int map_count;                          /* number of VMAs */
+        int core_waiters;
         struct rw_semaphore mmap_sem;
         spinlock_t page_table_lock;             /* Protects page tables and some counters */
 
@@ -216,11 +217,10 @@ struct mm_struct {
         unsigned long flags; /* Must use atomic bitops to access the bits */
 
         /* coredumping support */
-        int core_waiters;
         struct completion *core_startup_done, core_done;
 
         /* aio bits */
-        rwlock_t                ioctx_list_lock;
+        rwlock_t                ioctx_list_lock;        /* aio lock */
         struct kioctx           *ioctx_list;
 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
         struct mem_cgroup *mem_cgroup;