• Herbert Xu's avatar
    [CRYPTO] scatterwalk: Prepare for block ciphers · 5c64097a
    Herbert Xu authored
    This patch prepares the scatterwalk code for use by the new block cipher
    type.
    
    Firstly it halves the size of scatter_walk on 32-bit platforms.  This
    is important as we allocate at least two of these objects on the stack
    for each block cipher operation.
    
    It also exports the symbols since the block cipher code can be built as
    a module.
    
    Finally there is a hack in scatterwalk_unmap that relies on progress
    being made.  Unfortunately, for hardware crypto we can't guarantee
    progress to be made since the hardware can fail.
    
    So this also gets rid of the hack by not advancing the address returned
    by scatterwalk_map.
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    5c64097a
scatterwalk.c 2.43 KB