path: root/Documentation/kbuild/makefiles.txt
diff options
authorJames Hogan <james.hogan@imgtec.com>2016-06-24 23:42:23 +0100
committerThomas Gleixner <tglx@linutronix.de>2016-07-07 15:58:44 +0200
commit54b880caf15034644b564e378abf67b7f9eaf4dc (patch)
treedfef2534071d6afde8059f84fe228bc966ecc1e4 /Documentation/kbuild/makefiles.txt
parentLinux 4.7-rc6 (diff)
kbuild, x86: Track generated headers with generated-y
Track generated header files which aren't already in genhdr-y, alongside generic-y wrappers in the */include/generated/[uapi/]asm/ directories. Currently only x86 generates extra headers in these directories, for the purposes of enumerating system calls for different ABIs, and xen hypercalls. This will allow the asm-generic wrapper handling code to remove stale wrappers when files are removed from generic-y, without also removing these headers which are generated separately. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: James Hogan <james.hogan@imgtec.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-kbuild@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: Michal Marek <mmarek@suse.com> Link: http://lkml.kernel.org/r/1466808144-23209-2-git-send-email-james.hogan@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation/kbuild/makefiles.txt')
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 13f888a02a3d..385a5ef41c17 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -47,6 +47,7 @@ This document describes the Linux kernel Makefiles.
--- 7.2 genhdr-y
--- 7.3 destination-y
--- 7.4 generic-y
+ --- 7.5 generated-y
=== 8 Kbuild Variables
=== 9 Makefile language
@@ -1319,6 +1320,19 @@ See subsequent chapter for the syntax of the Kbuild file.
Example: termios.h
#include <asm-generic/termios.h>
+ --- 7.5 generated-y
+ If an architecture generates other header files alongside generic-y
+ wrappers, and not included in genhdr-y, then generated-y specifies
+ them.
+ This prevents them being treated as stale asm-generic wrappers and
+ removed.
+ Example:
+ #arch/x86/include/asm/Kbuild
+ generated-y += syscalls_32.h
=== 8 Kbuild Variables
The top Makefile exports the following variables: