Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964786AbbDIJDg (ORCPT ); Thu, 9 Apr 2015 05:03:36 -0400 Received: from terminus.zytor.com ([198.137.202.10]:51847 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933974AbbDIJDa (ORCPT ); Thu, 9 Apr 2015 05:03:30 -0400 Date: Thu, 9 Apr 2015 02:02:52 -0700 From: tip-bot for Denys Vlasenko Message-ID: Cc: hpa@zytor.com, bp@alien8.de, keescook@chromium.org, ast@plumgrid.com, rostedt@goodmis.org, torvalds@linux-foundation.org, wad@chromium.org, linux-kernel@vger.kernel.org, luto@amacapital.net, dvlasenk@redhat.com, tglx@linutronix.de, oleg@redhat.com, fweisbec@gmail.com, brgerst@gmail.com, mingo@kernel.org Reply-To: bp@alien8.de, keescook@chromium.org, rostedt@goodmis.org, ast@plumgrid.com, torvalds@linux-foundation.org, hpa@zytor.com, mingo@kernel.org, dvlasenk@redhat.com, tglx@linutronix.de, wad@chromium.org, luto@amacapital.net, linux-kernel@vger.kernel.org, oleg@redhat.com, fweisbec@gmail.com, brgerst@gmail.com In-Reply-To: <1428439424-7258-4-git-send-email-dvlasenk@redhat.com> References: <1428439424-7258-4-git-send-email-dvlasenk@redhat.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/asm] x86/asm/entry/64: Optimize [v]fork/clone stubs Git-Commit-ID: 772951c4e4b06cdffeff499259dba07b544f3166 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 Content-Length: 1778 Lines: 51 Commit-ID: 772951c4e4b06cdffeff499259dba07b544f3166 Gitweb: http://git.kernel.org/tip/772951c4e4b06cdffeff499259dba07b544f3166 Author: Denys Vlasenko AuthorDate: Tue, 7 Apr 2015 22:43:40 +0200 Committer: Ingo Molnar CommitDate: Thu, 9 Apr 2015 10:31:25 +0200 x86/asm/entry/64: Optimize [v]fork/clone stubs Replace "call func; ret" with "jmp func". Run-tested. Signed-off-by: Denys Vlasenko Cc: Alexei Starovoitov Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Steven Rostedt Cc: Thomas Gleixner Cc: Will Drewry Link: http://lkml.kernel.org/r/1428439424-7258-4-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/entry_64.S | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 5380b3a..ce85256 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -484,8 +484,7 @@ ENTRY(stub_\func) CFI_STARTPROC DEFAULT_FRAME 0, 8 /* offset 8: return address */ SAVE_EXTRA_REGS 8 - call sys_\func - ret + jmp sys_\func CFI_ENDPROC END(stub_\func) .endm -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/