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[174.21.142.130]) by smtp.gmail.com with ESMTPSA id q12-20020a17090aa00c00b001bc6f1baaaesm17149697pjp.39.2022.03.20.10.11.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 20 Mar 2022 10:11:42 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL for-7.1 06/36] util/log: Treat qemu_log_lock like trylock Date: Sun, 20 Mar 2022 10:11:05 -0700 Message-Id: <20220320171135.2704502-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220320171135.2704502-1-richard.henderson@linaro.org> References: <20220320171135.2704502-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::52b (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::52b; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x52b.google.com X-Spam_score_int: -6 X-Spam_score: -0.7 X-Spam_bar: / X-Spam_report: (-0.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alex.bennee@linaro.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Do not require qemu_log_unlock to be called when qemu_log_lock returns NULL. Signed-off-by: Richard Henderson --- util/log.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/util/log.c b/util/log.c index 248db6211e..b1651d8122 100644 --- a/util/log.c +++ b/util/log.c @@ -39,12 +39,14 @@ static GArray *debug_regions; FILE *qemu_log_lock(void) { QemuLogFile *logfile; + rcu_read_lock(); logfile = qatomic_rcu_read(&qemu_logfile); if (logfile) { qemu_flockfile(logfile->fd); return logfile->fd; } else { + rcu_read_unlock(); return NULL; } } @@ -53,8 +55,8 @@ void qemu_log_unlock(FILE *fd) { if (fd) { qemu_funlockfile(fd); + rcu_read_unlock(); } - rcu_read_unlock(); } /* Return the number of characters emitted. */ -- 2.25.1