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drm/i915/gvt: remove local storage of debugfs file

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There is no need to keep the dentry around for the debugfs kvmgt cache
file, as we can just look it up when we want to remove it later on.
Simplify the structure by removing the dentry and relying on debugfs
to find the dentry to remove when we want to.

By doing this change, we remove the last in-kernel user that was storing
the result of debugfs_create_long(), so that api can be cleaned up.

Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gvt-dev@lists.freedesktop.org
Cc: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20210518161705.3697143-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman
2021-05-18 18:17:05 +02:00
parent e1327a1277
commit 2100c9b060
1 changed files with 5 additions and 6 deletions
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11
drivers/gpu/drm/i915/gvt/kvmgt.c
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@@ -88,6 +88,7 @@ struct kvmgt_pgfn {
struct hlist_node hnode;
};
#define KVMGT_DEBUGFS_FILENAME "kvmgt_nr_cache_entries"
struct kvmgt_guest_info {
struct kvm *kvm;
struct intel_vgpu *vgpu;
@@ -95,7 +96,6 @@ struct kvmgt_guest_info {
#define NR_BKT (1 << 18)
struct hlist_head ptable[NR_BKT];
#undef NR_BKT
struct dentry *debugfs_cache_entries;
};
struct gvt_dma {
@@ -1843,16 +1843,15 @@ static int kvmgt_guest_init(struct mdev_device *mdev)
info->track_node.track_flush_slot = kvmgt_page_track_flush_slot;
kvm_page_track_register_notifier(kvm, &info->track_node);
info->debugfs_cache_entries = debugfs_create_ulong(
"kvmgt_nr_cache_entries",
0444, vgpu->debugfs,
&vdev->nr_cache_entries);
debugfs_create_ulong(KVMGT_DEBUGFS_FILENAME, 0444, vgpu->debugfs,
&vdev->nr_cache_entries);
return 0;
}
static bool kvmgt_guest_exit(struct kvmgt_guest_info *info)
{
debugfs_remove(info->debugfs_cache_entries);
debugfs_remove(debugfs_lookup(KVMGT_DEBUGFS_FILENAME,
info->vgpu->debugfs));
kvm_page_track_unregister_notifier(info->kvm, &info->track_node);
kvm_put_kvm(info->kvm);