• Daniel Jordan's avatar
    padata: make padata_do_parallel find alternate callback CPU · e6ce0e08
    Daniel Jordan authored
    padata_do_parallel currently returns -EINVAL if the callback CPU isn't
    in the callback cpumask.
    
    pcrypt tries to prevent this situation by keeping its own callback
    cpumask in sync with padata's and checks that the callback CPU it passes
    to padata is valid.  Make padata handle this instead.
    
    padata_do_parallel now takes a pointer to the callback CPU and updates
    it for the caller if an alternate CPU is used.  Overall behavior in
    terms of which callback CPUs are chosen stays the same.
    
    Prepares for removal of the padata cpumask notifier in pcrypt, which
    will fix a lockdep complaint about nested acquisition of the CPU hotplug
    lock later in the series.
    Signed-off-by: default avatarDaniel Jordan <daniel.m.jordan@oracle.com>
    Acked-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
    Cc: Herbert Xu <herbert@gondor.apana.org.au>
    Cc: Lai Jiangshan <jiangshanlai@gmail.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Tejun Heo <tj@kernel.org>
    Cc: linux-crypto@vger.kernel.org
    Cc: linux-kernel@vger.kernel.org
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    e6ce0e08
pcrypt.c 11.7 KB