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Biederman) To: LKML Cc: Oleg Nesterov , Linus Torvalds , Thomas Gleixner References: <20200419141057.621356-1-gladkov.alexey@gmail.com> <87ftcv1nqe.fsf@x220.int.ebiederm.org> <87wo66vvnm.fsf_-_@x220.int.ebiederm.org> <20200424173927.GB26802@redhat.com> <87mu6ymkea.fsf_-_@x220.int.ebiederm.org> <875zdmmj4y.fsf_-_@x220.int.ebiederm.org> <878sihgfzh.fsf@x220.int.ebiederm.org> <87sggnajpv.fsf_-_@x220.int.ebiederm.org> <20200428180540.GB29960@redhat.com> Date: Tue, 28 Apr 2020 16:39:44 -0500 In-Reply-To: <20200428180540.GB29960@redhat.com> (Oleg Nesterov's message of "Tue, 28 Apr 2020 20:05:41 +0200") Message-ID: <87mu6v70in.fsf_-_@x220.int.ebiederm.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-SPF: eid=1jTY0J-00015a-OA;;;mid=<87mu6v70in.fsf_-_@x220.int.ebiederm.org>;;;hst=in02.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX1+UtBNkHu4rLIVo9CsZRAkkaksr2Rapk5s= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on sa07.xmission.com X-Spam-Level: X-Spam-Status: No, score=0.3 required=8.0 tests=ALL_TRUSTED,BAYES_50, DCC_CHECK_NEGATIVE,T_TooManySym_01,XMGappySubj_01 autolearn=disabled version=3.4.2 X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60% * [score: 0.4875] * 0.5 XMGappySubj_01 Very gappy subject * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa07 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 T_TooManySym_01 4+ unique symbols in subject X-Spam-DCC: XMission; sa07 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;LKML X-Spam-Relay-Country: X-Spam-Timing: total 219 ms - load_scoreonly_sql: 0.04 (0.0%), signal_user_changed: 11 (5.1%), b_tie_ro: 10 (4.4%), parse: 0.79 (0.4%), extract_message_metadata: 2.4 (1.1%), get_uri_detail_list: 0.54 (0.2%), tests_pri_-1000: 3.4 (1.6%), tests_pri_-950: 1.31 (0.6%), tests_pri_-900: 0.98 (0.4%), tests_pri_-90: 66 (30.2%), check_bayes: 65 (29.5%), b_tokenize: 4.4 (2.0%), b_tok_get_all: 11 (5.1%), b_comp_prob: 1.69 (0.8%), b_tok_touch_all: 44 (20.0%), b_finish: 0.95 (0.4%), tests_pri_0: 116 (52.8%), check_dkim_signature: 0.49 (0.2%), check_dkim_adsp: 2.4 (1.1%), poll_dns_idle: 0.76 (0.3%), tests_pri_10: 2.7 (1.2%), tests_pri_500: 7 (3.2%), rewrite_mail: 0.00 (0.0%) Subject: [PATCH v1 0/4] signal: Removing has_group_leader_pid X-Spam-Flag: No X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With de_thread now calling exchange_tids has_group_leader_pid no longer makes any sense and is equivalent to calling thread_group_leader. As there are only 2 remaining users of has_group_leader_pid let's update the code and get rid of has_group_leader_pid. There is one extra patch to lookup_task that performs that unifies to code paths that become identical when has_group_leader_pid went away. Eric W. Biederman (4): posix-cpu-timer: Tidy up group_leader logic in lookup_task posix-cpu-timer: Unify the now redundant code in lookup_task exec: Remove BUG_ON(has_group_leader_pid) signal: Remove has_group_leader_pid fs/exec.c | 1 - include/linux/sched/signal.h | 11 ----------- kernel/time/posix-cpu-timers.c | 21 ++++++++------------- 3 files changed, 8 insertions(+), 25 deletions(-)