[PATCH] mm/init-mm.c: use CPU_BITS_NONE to initialize .cpu_bitmap
From: Rasmus Villemoes
Date: Thu Aug 22 2019 - 09:44:28 EST
init_mm is sizeof(long) larger than it needs to be. Use the
CPU_BITS_NONE macro meant for this, which will initialize just the
indices 0...(BITS_TO_LONGS(NR_CPUS)-1) and hence make the array size
actually BITS_TO_LONGS(NR_CPUS).
Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
---
mm/init-mm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/init-mm.c b/mm/init-mm.c
index a787a319211e..fb1e15028ef0 100644
--- a/mm/init-mm.c
+++ b/mm/init-mm.c
@@ -35,6 +35,6 @@ struct mm_struct init_mm = {
.arg_lock = __SPIN_LOCK_UNLOCKED(init_mm.arg_lock),
.mmlist = LIST_HEAD_INIT(init_mm.mmlist),
.user_ns = &init_user_ns,
- .cpu_bitmap = { [BITS_TO_LONGS(NR_CPUS)] = 0},
+ .cpu_bitmap = CPU_BITS_NONE,
INIT_MM_CONTEXT(init_mm)
};
--
2.20.1