[PATCH trivial] UAPI: Kbuild: add/modify comments for "uapi/Kbuild" and "uapi/linux/Kbuild"

[Chen Gang <gang.chen@asianux.com>]

"include/uapi/" is the whole Linux kernel API, it is important enough
to get more global explanations by comments.

In "include/uapi/Kbuild", "Makefile..." and "non-arch..." comments are
meaningless for current 'Kbuild', so delete them.

And add more explanations for "include/uapi/" in "include/uapi/Kbuild",
also add more explanations for "include/uapi/linux/" in "include/uapi
/linux/Kbuild".


Signed-off-by: Chen Gang <gang.chen@asianux.com>
---
 include/uapi/Kbuild       |    5 ++---
 include/uapi/linux/Kbuild |    2 ++
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/uapi/Kbuild b/include/uapi/Kbuild
index 81d2106..c682891 100644
--- a/include/uapi/Kbuild
+++ b/include/uapi/Kbuild
@@ -1,7 +1,6 @@
 # UAPI Header export list
-# Top-level Makefile calls into asm-$(ARCH)
-# List only non-arch directories below
-
+# Except "linux/", UAPI means Universal API.
+# For "linux/", UAPI means User API which can be used by user mode.
 
 header-y += asm-generic/
 header-y += linux/
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 997f9f2..0025e07 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -1,4 +1,6 @@
 # UAPI Header export list
+# UAPI is User API which can be used by user mode.
+
 header-y += byteorder/
 header-y += can/
 header-y += caif/
-- 
1.7.7.6