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/os-Linux/main.c b/arch/um/os-Linux/main.c
index fb510d4..e85f499 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -235,8 +235,8 @@
 		return __real_malloc(size);
 	else if(size <= UM_KERN_PAGE_SIZE)
 		/* finding contiguous pages can be hard*/
-		ret = um_kmalloc(size);
-	else ret = um_vmalloc(size);
+		ret = kmalloc(size, UM_GFP_KERNEL);
+	else ret = vmalloc(size);
 
 	/* glibc people insist that if malloc fails, errno should be
 	 * set by malloc as well. So we do.