2018-07-27 09:32:48

by Jia-Ju Bai

Subject: [PATCH] net: tipc: bcast: Replace GFP_ATOMIC with GFP_KERNEL in tipc_bcast_init()

tipc_bcast_init() is never called in atomic context.
It calls kzalloc() with GFP_ATOMIC, which is not necessary.
GFP_ATOMIC can be replaced with GFP_KERNEL.

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <[email protected]>
---
net/tipc/bcast.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index f3711176be45..9ee6cfea56dd 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -512,7 +512,7 @@ int tipc_bcast_init(struct net *net)
struct tipc_bc_base *bb = NULL;
struct tipc_link *l = NULL;

- bb = kzalloc(sizeof(*bb), GFP_ATOMIC);
+ bb = kzalloc(sizeof(*bb), GFP_KERNEL);
if (!bb)
goto enomem;
tn->bcbase = bb;
--
2.17.0

2018-07-27 21:14:48

by David Miller

Subject: Re: [PATCH] net: tipc: bcast: Replace GFP_ATOMIC with GFP_KERNEL in tipc_bcast_init()

From: Jia-Ju Bai <[email protected]>
Date: Fri, 27 Jul 2018 17:31:35 +0800

> tipc_bcast_init() is never called in atomic context.
> It calls kzalloc() with GFP_ATOMIC, which is not necessary.
> GFP_ATOMIC can be replaced with GFP_KERNEL.
>
> This is found by a static analysis tool named DCNS written by myself.
>
> Signed-off-by: Jia-Ju Bai <[email protected]>

Applied.