apparmor: remove minimum size check for vmalloc()

This is a follow-up to commit b5b3ee6c "apparmor: no need to delay vfree()".

Since vmalloc() will do "size = PAGE_ALIGN(size);",
we don't need to check for "size >= sizeof(struct work_struct)".
Signed-off-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: NJohn Johansen <john.johansen@canonical.com>

security/apparmor/lib.c

@@ -97,11 +97,6 @@ void *__aa_kvmalloc(size_t size, gfp_t flags)
 	if (size <= (16*PAGE_SIZE))
 		buffer = kmalloc(size, flags | GFP_NOIO | __GFP_NOWARN);
 	if (!buffer) {
-		/* see kvfree for why size must be at least work_struct size
-		 * when allocated via vmalloc
-		 */
-		if (size < sizeof(struct work_struct))
-			size = sizeof(struct work_struct);
 		if (flags & __GFP_ZERO)
 			buffer = vzalloc(size);
 		else