Hello Jens, As you know there are multiple drivers that both allocate a scatter/gather list and populate that list with pages. This patch series moves the code for allocating and freeing such scatterlists from these drivers into lib/scatterlist.c. Please consider this patch series for kernel v4.15.
Notes: - Only the ib_srpt and ipr changes have been tested. - The next step is to introduce a caching mechanism for these scatterlists and make the nvmet/rdma and SCSI target drivers use that caching mechanism since for these drivers sgl allocation occurs in the hot path. Changes between v2 and v3: - Added Reviewed-by tags that had been posted as replies on v2. - Cc'ed the crypto maintainers for the entire patch series. Changes between v1 and v2: - Moved the sgl_alloc*() and sgl_free() functions from a new source file into lib/scatterlist.c. - Changed the argument order for the sgl_alloc*() functions such that the (pointer to) the output argument comes last. Thanks, Bart. Bart Van Assche (8): lib/scatterlist: Introduce sgl_alloc() and sgl_free() crypto: scompress - use sgl_alloc() and sgl_free() nvmet/fc: Use sgl_alloc() and sgl_free() nvmet/rdma: Use sgl_alloc() and sgl_free() target: Use sgl_alloc_order() and sgl_free() scsi/ipr: Use sgl_alloc_order() and sgl_free_order() scsi/pmcraid: Remove an unused structure member scsi/pmcraid: Use sgl_alloc_order() and sgl_free_order() crypto/Kconfig | 1 + crypto/scompress.c | 51 +--------------- drivers/nvme/target/Kconfig | 2 + drivers/nvme/target/fc.c | 36 +---------- drivers/nvme/target/rdma.c | 63 ++------------------ drivers/scsi/Kconfig | 2 + drivers/scsi/ipr.c | 49 +++------------ drivers/scsi/ipr.h | 2 +- drivers/scsi/pmcraid.c | 43 ++------------ drivers/scsi/pmcraid.h | 3 +- drivers/target/Kconfig | 1 + drivers/target/target_core_transport.c | 46 ++------------- include/linux/scatterlist.h | 10 ++++ lib/Kconfig | 4 ++ lib/scatterlist.c | 105 +++++++++++++++++++++++++++++++++ 15 files changed, 151 insertions(+), 267 deletions(-) -- 2.14.3
