[PATCH] UID16 fixes

This fixes CONFIG_UID16 problems on x86-64 as discussed earlier.

CONFIG_UID16 now only selects the inclusion of kernel/uid16.c, all
conversions are triggered dynamically based on type sizes.  This allows
x86-64 to both include uid16.c for emulation purposes, but not truncate
uids to 16bit in sys_newstat. 

- Replace the old macros from linux/highuid.h with new SET_UID/SET_GID
  macros that do type checking. Based on Linus' proposal.

- Fix everybody to use them.

- Clean up some cruft in the x86-64 32bit emulation allowed by this
  (other 32bit emulations could be cleaned too, but I'm too lazy for 
  that right now) 

- Add one missing EOVERFLOW check in x86-64 32bit sys_newstat while
  I was at it.

1 files changed, 4 insertions, 4 deletions

diff --git a/ipc/util.c b/ipc/util.c
index 07bcb8d80a7223..806b2d7084f164 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -421,10 +421,10 @@ void kernel_to_ipc64_perm (struct kern_ipc_perm *in, struct ipc64_perm *out)
 void ipc64_perm_to_ipc_perm (struct ipc64_perm *in, struct ipc_perm *out)
 {
 	out->key	= in->key;
-	out->uid	= NEW_TO_OLD_UID(in->uid);
-	out->gid	= NEW_TO_OLD_GID(in->gid);
-	out->cuid	= NEW_TO_OLD_UID(in->cuid);
-	out->cgid	= NEW_TO_OLD_GID(in->cgid);
+	SET_UID(out->uid, in->uid);
+	SET_GID(out->gid, in->gid);
+	SET_UID(out->cuid, in->cuid);
+	SET_GID(out->cgid, in->cgid);
 	out->mode	= in->mode;
 	out->seq	= in->seq;
 }