events: convert to idr_alloc()

Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 7 deletions

diff --git a/kernel/events/core.c b/kernel/events/core.c
index ccc457e36354..5a92cf6beff0 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -5965,13 +5965,9 @@ int perf_pmu_register(struct pmu *pmu, char *name, int type)
         pmu->name = name;
 
         if (type < 0) {
-                int err = idr_pre_get(&pmu_idr, GFP_KERNEL);
-                if (!err)
-                        goto free_pdc;
-
-                err = idr_get_new_above(&pmu_idr, pmu, PERF_TYPE_MAX, &type);
-                if (err) {
-                        ret = err;
+                type = idr_alloc(&pmu_idr, pmu, PERF_TYPE_MAX, 0, GFP_KERNEL);
+                if (type < 0) {
+                        ret = type;
                         goto free_pdc;
                 }
         }