Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262043AbUKDBzS (ORCPT ); Wed, 3 Nov 2004 20:55:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262046AbUKDBzS (ORCPT ); Wed, 3 Nov 2004 20:55:18 -0500 Received: from host157-148.pool8289.interbusiness.it ([82.89.148.157]:58259 "EHLO zion.localdomain") by vger.kernel.org with ESMTP id S262043AbUKDBzH (ORCPT ); Wed, 3 Nov 2004 20:55:07 -0500 Subject: [patch 11/20] uml: remove SIGPROF from change_signals To: akpm@osdl.org Cc: jdike@addtoit.com, linux-kernel@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, cw@f00f.org, blaisorblade_spam@yahoo.it From: blaisorblade_spam@yahoo.it Date: Thu, 04 Nov 2004 00:17:40 +0100 Message-Id: <20041103231740.3112355C7D@zion.localdomain> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1879 Lines: 43 From: Paolo 'Blaisorblade' Giarrusso , Jeff Dike Since local_irq_save() and local_irq_disable() should match (apart from saving the flags), get/set_signals must match [un]block_signals, i.e. change_signals; since get/set_signals don't enable/disable SIGPROF (and this behaviour is safe as explained in the comment the patch adds, since the profiling code does not interact with the kernel code), not even change_signals must toggle it. Signed-off-by: Paolo 'Blaisorblade' Giarrusso --- vanilla-linux-2.6.9-paolo/arch/um/kernel/signal_user.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletion(-) diff -puN arch/um/kernel/signal_user.c~uml-remove-SIGPROF-change_signals arch/um/kernel/signal_user.c --- vanilla-linux-2.6.9/arch/um/kernel/signal_user.c~uml-remove-SIGPROF-change_signals 2004-11-03 23:44:59.984441096 +0100 +++ vanilla-linux-2.6.9-paolo/arch/um/kernel/signal_user.c 2004-11-03 23:44:59.986440792 +0100 @@ -57,6 +57,10 @@ int change_sig(int signal, int on) return(!sigismember(&old, signal)); } +/* Both here and in set/get_signal we don't touch SIGPROF, because we must not + * disable profiling; it's safe because the profiling code does not interact + * with the kernel code at all.*/ + static void change_signals(int type) { sigset_t mask; @@ -65,7 +69,6 @@ static void change_signals(int type) sigaddset(&mask, SIGVTALRM); sigaddset(&mask, SIGALRM); sigaddset(&mask, SIGIO); - sigaddset(&mask, SIGPROF); if(sigprocmask(type, &mask, NULL) < 0) panic("Failed to change signal mask - errno = %d", errno); } _ - 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/