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authorOrit Wasserman <owasserm@redhat.com>2012-08-06 21:42:50 +0300
committerJuan Quintela <quintela@redhat.com>2012-08-08 13:51:12 +0200
commit9fb26641ab497eda9138f9af75cbeb02ed59b5ae (patch)
treead4374600d582b27542fc8677048aa3f17f156ed /cutils.c
parent34c26412b76840e0cab9808047e29aebd429c139 (diff)
Add cache handling functions
Add MRU page cache mechanism. The page are accessed by their address. Signed-off-by: Benoit Hudzia <benoit.hudzia@sap.com> Signed-off-by: Petter Svard <petters@cs.umu.se> Signed-off-by: Aidan Shribman <aidan.shribman@sap.com> Signed-off-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'cutils.c')
-rw-r--r--cutils.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/cutils.c b/cutils.c
index 9d4c57093..35e2e2bf4 100644
--- a/cutils.c
+++ b/cutils.c
@@ -382,3 +382,12 @@ int qemu_parse_fd(const char *param)
}
return fd;
}
+
+/* round down to the nearest power of 2*/
+int64_t pow2floor(int64_t value)
+{
+ if (!is_power_of_2(value)) {
+ value = 0x8000000000000000ULL >> clz64(value);
+ }
+ return value;
+}