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Commit 54b880ca authored by James Hogan's avatar James Hogan Committed by Thomas Gleixner
Browse files

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: default avatarkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Acked-by: default avatarArnd 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: default avatarThomas Gleixner <tglx@linutronix.de>
parent a99cde43

Documentation/kbuild/makefiles.txt

+14 −0
Original line number Diff line number Diff line
@@ -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:

arch/x86/include/asm/Kbuild

+6 −0
Original line number Diff line number Diff line 




generated-y += syscalls_32.h

generated-y += syscalls_64.h

generated-y += unistd_32_ia32.h

generated-y += unistd_64_x32.h

generated-y += xen-hypercalls.h



genhdr-y += unistd_32.h

genhdr-y += unistd_64.h

genhdr-y += unistd_x32.h