Hello Jens, As you probably 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 a new source file, namely lib/sgl_alloc. Please consider this patch series for kernel v4.15. Notes: - Only the ib_srpt driver changes have been tested but none of the other drivers have been retested. - 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. Thanks, Bart. Bart Van Assche (8): lib: 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 | 52 +---------------- drivers/nvme/target/Kconfig | 2 + drivers/nvme/target/fc.c | 37 +----------- drivers/nvme/target/rdma.c | 64 ++------------------- drivers/scsi/Kconfig | 2 + drivers/scsi/ipr.c | 50 +++------------- drivers/scsi/ipr.h | 2 +- drivers/scsi/pmcraid.c | 44 ++------------ drivers/scsi/pmcraid.h | 3 +- drivers/target/Kconfig | 1 + drivers/target/target_core_transport.c | 47 ++------------- include/linux/sgl_alloc.h | 16 ++++++ lib/Kconfig | 4 ++ lib/Makefile | 1 + lib/sgl_alloc.c | 102 +++++++++++++++++++++++++++++++++ 16 files changed, 161 insertions(+), 267 deletions(-) create mode 100644 include/linux/sgl_alloc.h create mode 100644 lib/sgl_alloc.c -- 2.14.2
