Re: [PATCH] rdma: delete the useless casting value returned

[Jason Gunthorpe]

On Fri, Mar 12, 2021 at 10:19:30AM +0800, Wang Qing wrote:
> Fix the following coccicheck warning:
> WARNING: casting value returned by memory allocation function is useless.

This warning is wrong in this specific case.

The #define is creating a helper function that enforces strict type
safety on the user

So eg,

  struct bar *obj = rdma_zalloc_drv_obj(ibdev, ib_ah);

Will fail to compile because 'obj' is not the required ib_ah type

Jason