From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934034AbcHJUmQ (ORCPT ); Wed, 10 Aug 2016 16:42:16 -0400 Received: from terminus.zytor.com ([198.137.202.10]:56804 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933367AbcHJSNq (ORCPT ); Wed, 10 Aug 2016 14:13:46 -0400 Date: Wed, 10 Aug 2016 11:12:56 -0700 From: tip-bot for Valdis Kletnieks Message-ID: Cc: torvalds@linux-foundation.org, valdis.kletnieks@vt.edu, mingo@kernel.org, tglx@linutronix.de, Valdis.Kletnieks@vt.edu, bp@alien8.de, linux-kernel@vger.kernel.org, peterz@infradead.org, luto@kernel.org, dvlasenk@redhat.com, hpa@zytor.com, jpoimboe@redhat.com, brgerst@gmail.com Reply-To: peterz@infradead.org, luto@kernel.org, hpa@zytor.com, dvlasenk@redhat.com, jpoimboe@redhat.com, brgerst@gmail.com, linux-kernel@vger.kernel.org, Valdis.Kletnieks@vt.edu, bp@alien8.de, torvalds@linux-foundation.org, valdis.kletnieks@vt.edu, mingo@kernel.org, tglx@linutronix.de In-Reply-To: <7464.1470021890@turing-police.cc.vt.edu> References: <7464.1470021890@turing-police.cc.vt.edu> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/urgent] x86/build: Reduce the W=1 warnings noise when compiling x86 syscall tables Git-Commit-ID: 5e44258d168b2bdee51d9e2e1f1f4726ff9775cd X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 5e44258d168b2bdee51d9e2e1f1f4726ff9775cd Gitweb: http://git.kernel.org/tip/5e44258d168b2bdee51d9e2e1f1f4726ff9775cd Author: Valdis Kletnieks AuthorDate: Sun, 31 Jul 2016 23:24:50 -0400 Committer: Ingo Molnar CommitDate: Wed, 10 Aug 2016 16:05:16 +0200 x86/build: Reduce the W=1 warnings noise when compiling x86 syscall tables Building an X86_64 kernel with W=1 throws a total of 9,948 lines of warnings of this form for both 32-bit and 64-bit syscall tables. Given that the entire rest of the build for my config only generates 8,375 lines of output, this is a big reduction in the warnings generated. The warnings follow this pattern: ./arch/x86/include/generated/asm/syscalls_32.h:885:21: warning: initialized field overwritten [-Woverride-init] __SYSCALL_I386(379, compat_sys_pwritev2, ) ^ arch/x86/entry/syscall_32.c:13:46: note: in definition of macro '__SYSCALL_I386' #define __SYSCALL_I386(nr, sym, qual) [nr] = sym, ^~~ ./arch/x86/include/generated/asm/syscalls_32.h:885:21: note: (near initialization for 'ia32_sys_call_table[379]') __SYSCALL_I386(379, compat_sys_pwritev2, ) ^ arch/x86/entry/syscall_32.c:13:46: note: in definition of macro '__SYSCALL_I386' #define __SYSCALL_I386(nr, sym, qual) [nr] = sym, Since we intentionally build the syscall tables this way, ignore that one warning in the two files. Signed-off-by: Valdis Kletnieks Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/7464.1470021890@turing-police.cc.vt.edu Signed-off-by: Ingo Molnar --- arch/x86/entry/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/entry/Makefile b/arch/x86/entry/Makefile index fe91c25..77f28ce 100644 --- a/arch/x86/entry/Makefile +++ b/arch/x86/entry/Makefile @@ -5,6 +5,8 @@ OBJECT_FILES_NON_STANDARD_entry_$(BITS).o := y OBJECT_FILES_NON_STANDARD_entry_64_compat.o := y +CFLAGS_syscall_64.o += -Wno-override-init +CFLAGS_syscall_32.o += -Wno-override-init obj-y := entry_$(BITS).o thunk_$(BITS).o syscall_$(BITS).o obj-y += common.o