[tip: sched/urgent] sched: Replace zero-length array with flexible-array

[tip-bot2 for zhuguangqing]

The following commit has been merged into the sched/urgent branch of tip:

Commit-ID:     a3f1d195119ffe62c2c558c6f0dced070c2cf004
Gitweb:        https://git.kernel.org/tip/a3f1d195119ffe62c2c558c6f0dced070c2cf004
Author:        zhuguangqing <zhuguangqing@xxxxxxxxxx>
AuthorDate:    Wed, 14 Oct 2020 22:02:20 +08:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Wed, 14 Oct 2020 16:48:48 +02:00

sched: Replace zero-length array with flexible-array

In the following commit:

  04f5c362ec6d: ("sched/fair: Replace zero-length array with flexible-array")

a zero-length array cpumask[0] has been replaced with cpumask[].
But there is still a cpumask[0] in 'struct sched_group_capacity'
which was missed.

The point of using [] instead of [0] is that with [] the compiler will
generate a build warning if it isn't the last member of a struct.

[ mingo: Rewrote the changelog. ]

Signed-off-by: zhuguangqing <zhuguangqing@xxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20201014140220.11384-1-zhuguangqing83@xxxxxxxxx
---
 kernel/sched/sched.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 8d1ca65..df80bfc 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1471,7 +1471,7 @@ struct sched_group_capacity {
 	int			id;
 #endif
 
-	unsigned long		cpumask[0];		/* Balance mask */
+	unsigned long		cpumask[];		/* Balance mask */
 };
 
 struct sched_group {