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McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org Subject: [PATCH tip/core/rcu 0/4] SRCU updates for v4.21/v5.0 Reply-To: paulmck@linux.ibm.com MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 18111120-0040-0000-0000-000004908A61 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010028; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000270; SDB=6.01116027; UDB=6.00577119; IPR=6.00896128; MB=3.00024115; MTD=3.00000008; XFM=3.00000015; UTC=2018-11-11 20:08:37 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18111120-0041-0000-0000-000008999310 Message-Id: <20181111200834.GA10983@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-11-11_13:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=731 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1811110192 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! This series contains SRCU updates: 1. Fix kernel-doc missing notation, courtesy of Randy Dunlap. 2. Prevent __call_srcu() counter wrap with read-side critical section. 3. Lock srcu_data structure in srcu_gp_start(), fixing a an extremely rare but also extremely embarrassing concurrency bug, courtesy of Dennis Krein. 4. Use "ssp" instead of "sp" for srcu_struct pointer, in the hope that this prevents confusion about which lock is held. Thanx, Paul ------------------------------------------------------------------------ include/linux/srcu.h | 81 ++++--- include/linux/srcutiny.h | 24 +- include/linux/srcutree.h | 8 kernel/rcu/srcutiny.c | 120 +++++------ kernel/rcu/srcutree.c | 493 +++++++++++++++++++++++------------------------ 5 files changed, 367 insertions(+), 359 deletions(-)