Re: [PATCH net-next] net/sched: cls_flower: reduce fl_change stack size

[Jiri Pirko]

Thu, Jan 19, 2017 at 10:45:31AM CET, arnd@xxxxxxxx wrote:
>The new ARP support has pushed the stack size over the edge on ARM,
>as there are two large objects on the stack in this function (mask
>and tb) and both have now grown a bit more:
>
>net/sched/cls_flower.c: In function 'fl_change':
>net/sched/cls_flower.c:928:1: error: the frame size of 1072 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
>
>We can solve this by dynamically allocating one or both of them.
>I first tried to do it just for the mask, but that only saved
>152 bytes on ARM, while this version just does it for the 'tb'
>array, bringing the stack size back down to 664 bytes.
>
>Fixes: 99d31326cbe6 ("net/sched: cls_flower: Support matching on ARP")
>Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Acked-by: Jiri Pirko <jiri@xxxxxxxxxxxx>