| From | Tejun Heo <> | Subject | [PATCH 50/62] vfio: convert to idr_alloc() | Date | Sat, 2 Feb 2013 17:20:51 -0800 |
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Convert to the much saner new idr interface.
Only compile tested.
Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Alex Williamson <alex.williamson@redhat.com> Cc: kvm@vger.kernel.org --- This patch depends on an earlier idr changes and I think it would be best to route these together through -mm. Please holler if there's any objection. Thanks.
drivers/vfio/vfio.c | 18 +----------------- 1 file changed, 1 insertion(+), 17 deletions(-)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index 12c264d..0132846 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -139,23 +139,7 @@ EXPORT_SYMBOL_GPL(vfio_unregister_iommu_driver); */ static int vfio_alloc_group_minor(struct vfio_group *group) { - int ret, minor; - -again: - if (unlikely(idr_pre_get(&vfio.group_idr, GFP_KERNEL) == 0)) - return -ENOMEM; - - /* index 0 is used by /dev/vfio/vfio */ - ret = idr_get_new_above(&vfio.group_idr, group, 1, &minor); - if (ret == -EAGAIN) - goto again; - if (ret || minor > MINORMASK) { - if (minor > MINORMASK) - idr_remove(&vfio.group_idr, minor); - return -ENOSPC; - } - - return minor; + return idr_alloc(&vfio.group_idr, group, 1, MINORMASK + 1, GFP_KERNEL); } static void vfio_free_group_minor(int minor) -- 1.8.1
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