Add "cache" parameter to "-drive" (Laurent Vivier).


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3848 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/osdep.h b/osdep.h
index c8ab667..bc513ad 100644
--- a/osdep.h
+++ b/osdep.h
@@ -48,6 +48,7 @@
 void qemu_free(void *ptr);
 char *qemu_strdup(const char *str);
 
+void *qemu_memalign(size_t alignment, size_t size);
 void *qemu_vmalloc(size_t size);
 void qemu_vfree(void *ptr);