samples/vfs: fix build warnings

Fix build warnings reported from linux-next.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/r/20250120192504.4a1965a0@canb.auug.org.au
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/samples/vfs/test-list-all-mounts.c b/samples/vfs/test-list-all-mounts.c
index 23d028881263b08ef84c583367cc2215035b9570..1a02ea4593e391dc47889c9a84d40025dd9f73a2 100644 (file)
--- a/samples/vfs/test-list-all-mounts.c
+++ b/samples/vfs/test-list-all-mounts.c
@@ -5,6 +5,7 @@
 #include <errno.h>
 #include <limits.h>
 #include <linux/types.h>
+#include <inttypes.h>
 #include <stdio.h>
 
 #include "../../tools/testing/selftests/pidfd/pidfd.h"
@@ -86,8 +87,8 @@ int main(int argc, char *argv[])
        if (ret < 0)
                die_errno("ioctl(NS_GET_MNTNS_ID) failed");
 
-       printf("Listing %u mounts for mount namespace %llu\n",
-              info.nr_mounts, info.mnt_ns_id);
+       printf("Listing %u mounts for mount namespace %" PRIu64 "\n",
+              info.nr_mounts, (uint64_t)info.mnt_ns_id);
        for (;;) {
                ssize_t nr_mounts;
 next:
@@ -97,8 +98,8 @@ next:
                if (nr_mounts <= 0) {
                        int fd_mntns_next;
 
-                       printf("Finished listing %u mounts for mount namespace %llu\n\n",
-                              info.nr_mounts, info.mnt_ns_id);
+                       printf("Finished listing %u mounts for mount namespace %" PRIu64 "\n\n",
+                              info.nr_mounts, (uint64_t)info.mnt_ns_id);
                        fd_mntns_next = ioctl(fd_mntns, NS_MNT_GET_NEXT, &info);
                        if (fd_mntns_next < 0) {
                                if (errno == ENOENT) {
@@ -110,8 +111,8 @@ next:
                        close(fd_mntns);
                        fd_mntns = fd_mntns_next;
                        last_mnt_id = 0;
-                       printf("Listing %u mounts for mount namespace %llu\n",
-                              info.nr_mounts, info.mnt_ns_id);
+                       printf("Listing %u mounts for mount namespace %" PRIu64 "\n",
+                              info.nr_mounts, (uint64_t)info.mnt_ns_id);
                        goto next;
                }
 
@@ -129,14 +130,14 @@ next:
                                              STATMOUNT_MNT_OPTS |
                                              STATMOUNT_FS_TYPE, 0);
                        if (!stmnt) {
-                               printf("Failed to statmount(%llu) in mount namespace(%llu)\n",
-                                      last_mnt_id, info.mnt_ns_id);
+                               printf("Failed to statmount(%" PRIu64 ") in mount namespace(%" PRIu64 ")\n",
+                                      (uint64_t)last_mnt_id, (uint64_t)info.mnt_ns_id);
                                continue;
                        }
 
-                       printf("mnt_id:\t\t%llu\nmnt_parent_id:\t%llu\nfs_type:\t%s\nmnt_root:\t%s\nmnt_point:\t%s\nmnt_opts:\t%s\n\n",
-                              stmnt->mnt_id,
-                              stmnt->mnt_parent_id,
+                       printf("mnt_id:\t\t%" PRIu64 "\nmnt_parent_id:\t%" PRIu64 "\nfs_type:\t%s\nmnt_root:\t%s\nmnt_point:\t%s\nmnt_opts:\t%s\n\n",
+                              (uint64_t)stmnt->mnt_id,
+                              (uint64_t)stmnt->mnt_parent_id,
                               stmnt->str + stmnt->fs_type,
                               stmnt->str + stmnt->mnt_root,
                               stmnt->str + stmnt->mnt_point,