Re: [PATCH 1/1] crypto: ux500: hash: Add namespacing to hash_init()

From: Herbert Xu <herbert@gondor.apana.org.au>
To: Lee Jones <lee.jones@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Linus Walleij <linus.walleij@linaro.org>,
	"David S . Miller" <davem@davemloft.net>,
	linux-crypto@vger.kernel.org
Subject: Re: [PATCH 1/1] crypto: ux500: hash: Add namespacing to hash_init()
Date: Tue, 30 Jun 2020 14:10:29 +1000	[thread overview]
Message-ID: <20200630041029.GA20892@gondor.apana.org.au> (raw)
In-Reply-To: <20200629123003.1014387-1-lee.jones@linaro.org>

On Mon, Jun 29, 2020 at 01:30:03PM +0100, Lee Jones wrote:
> A recent change to the Regulator consumer API (which this driver
> utilises) add prototypes for the some suspend functions.  These
> functions require including header file include/linux/suspend.h.
> 
> The following tree of includes affecting this driver will be
> present:
> 
>    In file included from include/linux/elevator.h:6,
>                     from include/linux/blkdev.h:288,
>                     from include/linux/blk-cgroup.h:23,
>                     from include/linux/writeback.h:14,
>                     from include/linux/memcontrol.h:22,
>                     from include/linux/swap.h:9,
>                     from include/linux/suspend.h:5,
>                     from include/linux/regulator/consumer.h:35,
>                     from drivers/crypto/ux500/hash/hash_core.c:28:
> 
> include/linux/elevator.h pulls in include/linux/hashtable.h which
> contains its own version of hash_init().  This confuses the build
> system and results in the following error (amongst others):
> 
>  drivers/crypto/ux500/hash/hash_core.c:1362:19: error: passing argument 1 of '__hash_init' from incompatible pointer type [-Werror=incompatible-pointer-types]
>  1362 |  return hash_init(req);
> 
> Fix this by namespacing the local hash_init() such that the
> source of confusion is removed.
> 
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Herbert Xu <herbert@gondor.apana.org.au>
> Cc: David S. Miller <davem@davemloft.net>
> Cc: linux-crypto@vger.kernel.org
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
> 
> Ideally this should go into v5.8's -rcs else it runs the risk of
> breaking when Linus pulls everything in for v5.9-rc1.

I have no objections to this patch.  However, I'd rather put
it on a topic branch which you could pull rather than pushing
it into 5.8 straight away.

I also dislike pulling in the kitchen sink when all you need in
consumer.h is the definition of suspend_state_t.  A better solution
would be to move the definition of suspend_state_t into linux/types.h
and including that instead of suspend.h in consumer.h.

Cheers,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt