On 32bit builds gcc says:
kernel/user.c:30:4: warning: this decimal constant is unsigned only in ISO C90 [enabled by default]
kernel/user.c:38:4: warning: this decimal constant is unsigned only in ISO C90 [enabled by default]
Silence gcc by changing the constant 
4294967295 to 4294967295U.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
 
                .extent[0] = {
                        .first = 0,
                        .lower_first = 0,
-                       .count = 4294967295,
+                       .count = 4294967295U,
                },
        },
        .gid_map = {
                .extent[0] = {
                        .first = 0,
                        .lower_first = 0,
-                       .count = 4294967295,
+                       .count = 4294967295U,
                },
        },
        .kref = {