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Subject[PATCH 0/2] Use sbitmap instead of percpu_ida
Date
From: Matthew Wilcox <mawilcox@microsoft.com>

This is a pretty rough-and-ready conversion of the target drivers
from using percpu_ida to sbitmap. It compiles; I don't have a target
setup, so it's completely untested. I haven't tried to do anything
particularly clever here, so it's possible that, for example, the wait
queue in iscsi_target_util could be more clever, like the block layer
uses multiple wait queues to avoid pingpongs. Or maybe we could figure
out a way to not store the CPU that the ID was allocated on, or perhaps
the options I specified to sbitmap_queue_init() are suboptimal.

Patch 2 isn't interesting; it just deletes the implementation. Patch 1
will be where all the action is.

Matthew Wilcox (2):
Convert target drivers to use sbitmap
Remove percpu_ida

drivers/scsi/qla2xxx/qla_target.c | 16 +-
drivers/target/iscsi/iscsi_target_util.c | 34 +-
drivers/target/sbp/sbp_target.c | 8 +-
drivers/target/target_core_transport.c | 5 +-
drivers/target/tcm_fc/tfc_cmd.c | 11 +-
drivers/usb/gadget/function/f_tcm.c | 8 +-
drivers/vhost/scsi.c | 9 +-
drivers/xen/xen-scsiback.c | 8 +-
include/linux/percpu_ida.h | 83 -----
include/target/iscsi/iscsi_target_core.h | 1 +
include/target/target_core_base.h | 5 +-
lib/Makefile | 2 +-
lib/percpu_ida.c | 391 -----------------------
13 files changed, 74 insertions(+), 507 deletions(-)
delete mode 100644 include/linux/percpu_ida.h
delete mode 100644 lib/percpu_ida.c

--
2.17.0

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