On Wed, Sep 17, 2014 at 02:15:40PM +0300, Dmitry Kasatkin wrote: > On 17/09/14 12:22, Herbert Xu wrote: > > On Mon, Sep 15, 2014 at 12:30:23AM -0700, behanw@xxxxxxxxxxxxxxxxxx wrote: > >> From: Behan Webster <behanw@xxxxxxxxxxxxxxxxxx> > >> > >> Add a macro which replaces the use of a Variable Length Array In Struct (VLAIS) > >> with a C99 compliant equivalent. This macro instead allocates the appropriate > >> amount of memory using an char array. > >> > >> The new code can be compiled with both gcc and clang. > >> > >> struct shash_desc contains a flexible array member member ctx declared with > >> CRYPTO_MINALIGN_ATTR, so sizeof(struct shash_desc) aligns the beginning > >> of the array declared after struct shash_desc with long long. > >> > >> No trailing padding is required because it is not a struct type that can > >> be used in an array. > >> > >> The CRYPTO_MINALIGN_ATTR is required so that desc is aligned with long long > >> as would be the case for a struct containing a member with > >> CRYPTO_MINALIGN_ATTR. > >> > >> Signed-off-by: Behan Webster <behanw@xxxxxxxxxxxxxxxxxx> > > Acked-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> > > > > Thanks, > > Just in case. > I would still follow advice from "Michał Mirosław" to use shash##__desc[] Oh yes of course. My ack is more about the approach. Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
