[PATCH] m68knommu: add SHM support

It turns out SHMAT, SHMDT, SHMGET and SHMCTL support in sys_ipc() for
m68knommu in 2.6 kernel(uClinux-dist-20060803 release) is missing.
(copied from m68k sources, report by David Wu <davidwu@arcturusnetworks.com>)
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/m68knommu/kernel/sys_m68k.c

@@ -137,7 +137,7 @@ asmlinkage int old_select(struct sel_arg_struct *arg)
 asmlinkage int sys_ipc (uint call, int first, int second,
 			int third, void *ptr, long fifth)
 {
-	int version;
+	int version, ret;
 
 	version = call >> 16; /* hack for backward compatibility */
 	call &= 0xffff;
@@ -190,6 +190,27 @@ asmlinkage int sys_ipc (uint call, int first, int second,
 		default:
 			return -EINVAL;
 		}
+	if (call <= SHMCTL)
+		switch (call) {
+		case SHMAT:
+			switch (version) {
+			default: {
+				ulong raddr;
+				ret = do_shmat (first, ptr, second, &raddr);
+				if (ret)
+					return ret;
+				return put_user (raddr, (ulong __user *) third);
+			}
+			}
+		case SHMDT:
+			return sys_shmdt (ptr);
+		case SHMGET:
+			return sys_shmget (first, second, third);
+		case SHMCTL:
+			return sys_shmctl (first, second, ptr);
+		default:
+			return -ENOSYS;
+		}
 
 	return -EINVAL;
 }