homed,shutdown: call valgrind magic after LOOP_GET_STATUS64

valgrind doesn't understand LOOP_GET_STATUS64. We already work around
this in various placed, via VALGRIND_MAKE_MEM_DEFINE(), but we forgot
three places. Let's fix that.

src/home/homework-luks.c

@@ -8,6 +8,10 @@
 #include <sys/mount.h>
 #include <sys/xattr.h>
 
+#if HAVE_VALGRIND_MEMCHECK_H
+#include <valgrind/memcheck.h>
+#endif
+
 #include "sd-daemon.h"
 
 #include "blkid-util.h"
@@ -1193,6 +1197,10 @@ int home_prepare_luks(
                                 offset *= 512U;
                         }
                 } else {
+#if HAVE_VALGRIND_MEMCHECK_H
+                        VALGRIND_MAKE_MEM_DEFINED(&info, sizeof(info));
+#endif
+
                         offset = info.lo_offset;
                         size = info.lo_sizelimit;
                 }

src/shutdown/umount.c

@@ -15,6 +15,10 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#if HAVE_VALGRIND_MEMCHECK_H
+#include <valgrind/memcheck.h>
+#endif
+
 #include "sd-device.h"
 
 #include "alloc-util.h"
@@ -409,6 +413,10 @@ static int delete_loopback(const char *device) {
                         return -EBUSY; /* propagate original error */
                 }
 
+#if HAVE_VALGRIND_MEMCHECK_H
+                VALGRIND_MAKE_MEM_DEFINED(&info, sizeof(info));
+#endif
+
                 if (FLAGS_SET(info.lo_flags, LO_FLAGS_AUTOCLEAR)) /* someone else already set LO_FLAGS_AUTOCLEAR for us? fine by us */
                         return -EBUSY; /* propagate original error */
 
@@ -434,6 +442,10 @@ static int delete_loopback(const char *device) {
                 return 1;
         }
 
+#if HAVE_VALGRIND_MEMCHECK_H
+        VALGRIND_MAKE_MEM_DEFINED(&info, sizeof(info));
+#endif
+
         /* Linux makes LOOP_CLR_FD succeed whenever LO_FLAGS_AUTOCLEAR is set without actually doing
          * anything. Very confusing. Let's hence not claim we did anything in this case. */
         if (FLAGS_SET(info.lo_flags, LO_FLAGS_AUTOCLEAR))