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[PULL,09/11] s390x/flic: cache flic in s390_get_flic

Message ID 20170421074038.774-10-cornelia.huck@de.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Cornelia Huck April 21, 2017, 7:40 a.m. UTC 
From: Fei Li <sherrylf@linux.vnet.ibm.com>

s390_get_flic() is called many times to obtain the flic. This wastes a
lot of time as it calls object_resolve_path() every time. Let's cache
S390FLICState by defining it as static.

Signed-off-by: Fei Li <sherrylf@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
 hw/intc/s390_flic.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
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Patch

diff --git a/hw/intc/s390_flic.c b/hw/intc/s390_flic.c
index bef4caf980..711c11454f 100644
--- a/hw/intc/s390_flic.c
+++ b/hw/intc/s390_flic.c
@@ -21,11 +21,14 @@ 
 
 S390FLICState *s390_get_flic(void)
 {
-    S390FLICState *fs;
+    static S390FLICState *fs;
 
-    fs = S390_FLIC_COMMON(object_resolve_path(TYPE_KVM_S390_FLIC, NULL));
     if (!fs) {
-        fs = S390_FLIC_COMMON(object_resolve_path(TYPE_QEMU_S390_FLIC, NULL));
+        fs = S390_FLIC_COMMON(object_resolve_path(TYPE_KVM_S390_FLIC, NULL));
+        if (!fs) {
+            fs = S390_FLIC_COMMON(object_resolve_path(TYPE_QEMU_S390_FLIC,
+                                                      NULL));
+        }
     }
     return fs;
 }