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Date: Tue, 19 Jan 2016 13:37:49 +0000 From: James Hogan <james.hogan@...tec.com> To: Michal Marek <mmarek@...e.com> CC: <linux-kernel@...r.kernel.org>, Heinrich Schuchardt <xypron.glpk@....de>, James Hogan <james.hogan@...tec.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, "Jonathan Corbet" <corbet@....net>, <linux-kbuild@...r.kernel.org>, <x86@...nel.org>, <linux-doc@...r.kernel.org> Subject: [PATCH v2 1/2] 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@...el.com> Signed-off-by: James Hogan <james.hogan@...tec.com> Cc: Michal Marek <mmarek@...e.com> Cc: Thomas Gleixner <tglx@...utronix.de> Cc: Ingo Molnar <mingo@...hat.com> Cc: "H. Peter Anvin" <hpa@...or.com> Cc: Jonathan Corbet <corbet@....net> Cc: linux-kbuild@...r.kernel.org Cc: x86@...nel.org Cc: linux-doc@...r.kernel.org --- Changes in v2: - New patch (thanks to kbuild test robot). --- Documentation/kbuild/makefiles.txt | 14 ++++++++++++++ arch/x86/include/asm/Kbuild | 6 ++++++ 2 files changed, 20 insertions(+) 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: diff --git a/arch/x86/include/asm/Kbuild b/arch/x86/include/asm/Kbuild index aeac434c9feb..2cfed174e3c9 100644 --- a/arch/x86/include/asm/Kbuild +++ b/arch/x86/include/asm/Kbuild @@ -1,5 +1,11 @@ +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 -- 2.4.10
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