From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753562AbbC0Lrr (ORCPT ); Fri, 27 Mar 2015 07:47:47 -0400 Received: from terminus.zytor.com ([198.137.202.10]:37352 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752922AbbC0Lrm (ORCPT ); Fri, 27 Mar 2015 07:47:42 -0400 Date: Fri, 27 Mar 2015 04:47:00 -0700 From: tip-bot for Denys Vlasenko Message-ID: Cc: fweisbec@gmail.com, oleg@redhat.com, wad@chromium.org, luto@amacapital.net, tglx@linutronix.de, ast@plumgrid.com, bp@alien8.de, dvlasenk@redhat.com, rostedt@goodmis.org, torvalds@linux-foundation.org, hpa@zytor.com, linux-kernel@vger.kernel.org, keescook@chromium.org, mingo@kernel.org Reply-To: dvlasenk@redhat.com, ast@plumgrid.com, bp@alien8.de, oleg@redhat.com, fweisbec@gmail.com, tglx@linutronix.de, luto@amacapital.net, wad@chromium.org, linux-kernel@vger.kernel.org, hpa@zytor.com, rostedt@goodmis.org, torvalds@linux-foundation.org, keescook@chromium.org, mingo@kernel.org In-Reply-To: <1427303896-24023-3-git-send-email-dvlasenk@redhat.com> References: <1427303896-24023-3-git-send-email-dvlasenk@redhat.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/asm] x86/asm/entry/64: Use smaller instructions Git-Commit-ID: 47eb582e702880c302036d17341c7ea1a7dc2a53 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: 47eb582e702880c302036d17341c7ea1a7dc2a53 Gitweb: http://git.kernel.org/tip/47eb582e702880c302036d17341c7ea1a7dc2a53 Author: Denys Vlasenko AuthorDate: Wed, 25 Mar 2015 18:18:15 +0100 Committer: Ingo Molnar CommitDate: Fri, 27 Mar 2015 09:57:06 +0100 x86/asm/entry/64: Use smaller instructions The $AUDIT_ARCH_X86_64 parameter to syscall_trace_enter_phase1/2 is a 32-bit constant, loading it with 32-bit MOV produces 5-byte insn instead of 10-byte MOVABS one. Signed-off-by: Denys Vlasenko Cc: Alexei Starovoitov Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Steven Rostedt Cc: Will Drewry Link: http://lkml.kernel.org/r/1427303896-24023-3-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/entry_64.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 9988c4b..f85d2cc 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -305,7 +305,7 @@ system_call_fastpath: /* Do syscall entry tracing */ tracesys: movq %rsp, %rdi - movq $AUDIT_ARCH_X86_64, %rsi + movl $AUDIT_ARCH_X86_64, %esi call syscall_trace_enter_phase1 test %rax, %rax jnz tracesys_phase2 /* if needed, run the slow path */ @@ -316,7 +316,7 @@ tracesys: tracesys_phase2: SAVE_EXTRA_REGS movq %rsp, %rdi - movq $AUDIT_ARCH_X86_64, %rsi + movl $AUDIT_ARCH_X86_64, %esi movq %rax,%rdx call syscall_trace_enter_phase2