[PATCH] process events connector: uid_t gid_t size issues

The uid_t and gid_t fields appear to present a 32/64-bit userspace/kernel
problem for some archs.

This patch addresses the problem by fixing the size to the largest size for
uid_t/gid_t used in the kernel.  This preserves the total size of the event
structure while ensuring that the layouts of the ID change event match in
32 and 64-bit kernels and applications.

Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/cn_proc.h

@@ -86,12 +86,12 @@ struct proc_event {
 			pid_t process_pid;
 			pid_t process_tgid;
 			union {
-				uid_t ruid; /* current->uid */
-				gid_t rgid; /* current->gid */
+				__u32 ruid; /* task uid */
+				__u32 rgid; /* task gid */
 			} r;
 			union {
-				uid_t euid;
-				gid_t egid;
+				__u32 euid;
+				__u32 egid;
 			} e;
 		} id;