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SubjectRe: [PATCH v2] staging: skein: Loadable Module Support
On Wed, Oct 22, 2014 at 10:54:26AM -0500, Eric Rost wrote:
> On Wed, 2014-10-22 at 11:10 -0400, Jason Cooper wrote:
> > At some point, Eric Rost wrote:
...
> > > diff --git a/drivers/staging/skein/Makefile b/drivers/staging/skein/Makefile
> > > index a14aadd..1be01fe 100644
> > > --- a/drivers/staging/skein/Makefile
> > > +++ b/drivers/staging/skein/Makefile
> > > @@ -5,5 +5,11 @@ obj-$(CONFIG_CRYPTO_SKEIN) += skein.o \
> > > skein_api.o \
> > > skein_block.o
> > >
> > > +obj-$(CONFIG_CRYPTO_SKEIN_256) += skein256_generic.o
> > > +
> > > +obj-$(CONFIG_CRYPTO_SKEIN_512) += skein512_generic.o
> > > +
> > > +obj-$(CONFIG_CRYPTO_SKEIN_1024) += skein1024_generic.o
> > > +
> >
> > This isn't really doing what we want. You'll have loadable modules, but
> > the actual code will still be built into the kernel.
> >
> > > obj-$(CONFIG_CRYPTO_THREEFISH) += threefish_block.o \
> > > threefish_api.o
> > > diff --git a/drivers/staging/skein/skein.c b/drivers/staging/skein/skein.c
> > > index 8cc8358..2138e22 100644
> > > --- a/drivers/staging/skein/skein.c
> > > +++ b/drivers/staging/skein/skein.c
> > > @@ -11,6 +11,7 @@
> > > #define SKEIN_PORT_CODE /* instantiate any code in skein_port.h */
> > >
> > > #include <linux/string.h> /* get the memcpy/memset functions */
> > > +#include <linux/export.h>
> > > #include "skein.h" /* get the Skein API definitions */
> > > #include "skein_iv.h" /* get precomputed IVs */
> > > #include "skein_block.h"
> > > @@ -73,6 +74,7 @@ int skein_256_init(struct skein_256_ctx *ctx, size_t hash_bit_len)
> > >
> > > return SKEIN_SUCCESS;
> > > }
> > > +EXPORT_SYMBOL(skein_256_init);
> >
> > Once the above is corrected, these shouldn't be necessary.
> >
> Will give it a whirl, I was having problems with undefined symbols at
> linking even when I was building it as one module, but it may have been
> something else

Try just changing CRYPTO_SKEIN to a tri-state, and adding your
skein_generic.o to the obj-$(CONFIG_CRYPTO_SKEIN) list.

You'll probably have to collapse CRYPTO_THREEFISH into CRYPTO_SKEIN for
now. Let's get the crypto API registration proper first, them we can
focus on the loadable module bit.

thx,

Jason.


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