{"id":2233155,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2233155/?format=json","web_url":"http://patchwork.ozlabs.org/project/glibc/patch/20260505190809.3898686-2-adhemerval.zanella@linaro.org/","project":{"id":41,"url":"http://patchwork.ozlabs.org/api/1.2/projects/41/?format=json","name":"GNU C Library","link_name":"glibc","list_id":"libc-alpha.sourceware.org","list_email":"libc-alpha@sourceware.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260505190809.3898686-2-adhemerval.zanella@linaro.org>","list_archive_url":null,"date":"2026-05-05T19:06:50","name":"[v2,1/3] support: Add support_process_shared_robust_mutex","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"2cff733e3580f0e70a6017571f60ed07c5062e51","submitter":{"id":66065,"url":"http://patchwork.ozlabs.org/api/1.2/people/66065/?format=json","name":"Adhemerval Zanella Netto","email":"adhemerval.zanella@linaro.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/glibc/patch/20260505190809.3898686-2-adhemerval.zanella@linaro.org/mbox/","series":[{"id":502884,"url":"http://patchwork.ozlabs.org/api/1.2/series/502884/?format=json","web_url":"http://patchwork.ozlabs.org/project/glibc/list/?series=502884","date":"2026-05-05T19:06:49","name":"nptl: Fix robust mutex support detection and defer robust list initialization","version":2,"mbox":"http://patchwork.ozlabs.org/series/502884/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2233155/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2233155/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","libc-alpha@sourceware.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","libc-alpha@sourceware.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=GdU7/K9k;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=pass (2048-bit key,\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=GdU7/K9k","sourceware.org;\n dmarc=pass (p=none dis=none) header.from=linaro.org","sourceware.org; spf=pass smtp.mailfrom=linaro.org","server2.sourceware.org;\n arc=none smtp.remote-ip=2607:f8b0:4864:20::e33"],"Received":["from vm01.sourceware.org (vm01.sourceware.org\n [IPv6:2620:52:6:3111::32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g97Pf47Fbz1yJV\n\tfor ; Wed, 06 May 2026 05:10:14 +1000 (AEST)","from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id 8F2A84BABF35\n\tfor ; Tue, 5 May 2026 19:10:12 +0000 (GMT)","from mail-vs1-xe33.google.com (mail-vs1-xe33.google.com\n [IPv6:2607:f8b0:4864:20::e33])\n by sourceware.org (Postfix) with ESMTPS id E2C1F4BA799C\n for ; Tue, 5 May 2026 19:08:18 +0000 (GMT)","by mail-vs1-xe33.google.com with SMTP id\n ada2fe7eead31-610f4cf6ddcso159285137.1\n for ; Tue, 05 May 2026 12:08:18 -0700 (PDT)","from mandiga.. 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you can redistribute it and/or\n+ modify it under the terms of the GNU Lesser General Public\n+ License as published by the Free Software Foundation; either\n+ version 2.1 of the License, or (at your option) any later version.\n+\n+ The GNU C Library is distributed in the hope that it will be useful,\n+ but WITHOUT ANY WARRANTY; without even the implied warranty of\n+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n+ Lesser General Public License for more details.\n+\n+ You should have received a copy of the GNU Lesser General Public\n+ License along with the GNU C Library; if not, see\n+ . */\n+\n+#include \n+#include \n+#include \n+\n+bool\n+support_process_shared_robust_mutex (void)\n+{\n+#ifdef __linux__\n+ void *head;\n+ size_t len;\n+ int r = syscall (__NR_get_robust_list, 0, &head, &len);\n+ return r == 0;\n+#else\n+ return true;\n+#endif\n+}\ndiff --git a/support/xthread.h b/support/xthread.h\nindex d585bd0c3c6..7afd96dd3b9 100644\n--- a/support/xthread.h\n+++ b/support/xthread.h\n@@ -36,6 +36,9 @@ void delayed__exit (int seconds);\n /* Returns true if Priority Inheritance support CLOCK_MONOTONIC. */\n bool support_mutex_pi_monotonic (void);\n \n+/* Returns true if process-shared robust mutexes are supported. */\n+bool support_process_shared_robust_mutex (void);\n+\n /* Terminate the process (with exit status 1) if VALUE is not zero.\n In that case, print a failure message to standard output mentioning\n FUNCTION. The process is terminated with the exit function, so\n","prefixes":["v2","1/3"]}