uml: Eliminate kernel allocator wrappers

UML had two wrapper procedures for kmalloc, um_kmalloc and um_kmalloc_atomic
because the flag constants weren't available in userspace code.
kern_constants.h had made kernel constants available for a long time, so there
is no need for these wrappers any more.  Rather, userspace code calls kmalloc
directly with the userspace versions of the gfp flags.

kmalloc isn't a real procedure, so I had to essentially copy the inline
wrapper around __kmalloc.

vmalloc also had its own wrapper for no good reason.  This is now gone.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/drivers/mcast_user.c b/arch/um/drivers/mcast_user.c
index d319db1..236a3df 100644
--- a/arch/um/drivers/mcast_user.c
+++ b/arch/um/drivers/mcast_user.c
@@ -30,7 +30,7 @@
 {
 	struct sockaddr_in *sin;
 
-	sin = um_kmalloc(sizeof(struct sockaddr_in));
+	sin = kmalloc(sizeof(struct sockaddr_in), UM_GFP_KERNEL);
 	if(sin == NULL){
 		printk("new_addr: allocation of sockaddr_in failed\n");
 		return NULL;