crypto: scomp - Allocate per-cpu buffers on first use

Per-cpu buffers can be wasteful when the number of CPUs is large, especially if the buffer itself is likely to never be used. Reduce such wastage by only allocating them on first use of a particular CPU.

The first two patches create the gound-work so that scomp can safely flush work structs in its cra_destroy function. The last patch implements allocation on first use.

Herbert Xu (3):
crypto: api - Move alg destroy work from instance to template
crypto: api - Ensure cra_type->destroy is done in process context
crypto: scomp - Allocate per-cpu buffer on first use of each CPU

 crypto/algapi.c                     |  48 +++++--
 crypto/api.c                        |  10 --
 crypto/internal.h                   |   3 +-
 crypto/scompress.c                  | 203 ++++++++++++++++++++++------
 include/crypto/acompress.h          |   6 -
 include/crypto/algapi.h             |   5 +-
 include/crypto/internal/acompress.h |   1 -
 include/crypto/internal/scompress.h |  13 ++
 8 files changed, 214 insertions(+), 75 deletions(-)

2.39.5