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Petersen" , Karan Tilak Kumar , Hans Verkuil , Casey Schaufler , Steven Rostedt , Viacheslav Dubeyko , Max Kellermann , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, openipmi-developer@lists.sourceforge.net, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, amd-gfx@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-mmc@vger.kernel.org, netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-pci@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-staging@lists.linux.dev, ceph-devel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Rasmus Villemoes , Sergey Senozhatsky , Jonathan Corbet , Sumit Semwal , Gustavo Padovan , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , Konrad Dybcio , Lucas De Marchi , Thomas =?iso-8859-1?Q?Hellstr=F6m?= , Rodrigo Vivi , Vladimir Oltean , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Tony Nguyen , Przemek Kitszel , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Kishon Vijay Abraham I , Bjorn Helgaas , Rodolfo Giometti , Jonathan Lemon , Richard Cochran , Stefan Haberland , Jan Hoeppner , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Satish Kharat , Sesidhar Baddela , "James E.J. Bottomley" , Mauro Carvalho Chehab , Greg Kroah-Hartman , Xiubo Li , Ilya Dryomov , Masami Hiramatsu , Mathieu Desnoyers , Andrew Morton Subject: Re: [PATCH v3 19/21] scsi: fnic: Switch to use %ptSp Message-ID: References: <20251113150217.3030010-1-andriy.shevchenko@linux.intel.com> <20251113150217.3030010-20-andriy.shevchenko@linux.intel.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo On Wed, Nov 19, 2025 at 11:08:01AM +0100, Petr Mladek wrote: > On Thu 2025-11-13 15:32:33, Andy Shevchenko wrote: > > Use %ptSp instead of open coded variants to print content of > > struct timespec64 in human readable format. > > I was about to commit the changes into printk/linux.git and > found a mistake during the final double check, see below. > > > diff --git a/drivers/scsi/fnic/fnic_trace.c b/drivers/scsi/fnic/fnic_trace.c > > index cdc6b12b1ec2..0a849a195a8e 100644 > > --- a/drivers/scsi/fnic/fnic_trace.c > > +++ b/drivers/scsi/fnic/fnic_trace.c > > @@ -215,30 +213,26 @@ int fnic_get_stats_data(struct stats_debug_info *debug, > > { > > int len = 0; > > int buf_size = debug->buf_size; > > - struct timespec64 val1, val2; > > + struct timespec64 val, val1, val2; > > int i = 0; > > > > - ktime_get_real_ts64(&val1); > > + ktime_get_real_ts64(&val); > > len = scnprintf(debug->debug_buffer + len, buf_size - len, > > "------------------------------------------\n" > > "\t\tTime\n" > > "------------------------------------------\n"); > > > > + val1 = timespec64_sub(val, stats->stats_timestamps.last_reset_time); > > + val2 = timespec64_sub(val, stats->stats_timestamps.last_read_time); > > len += scnprintf(debug->debug_buffer + len, buf_size - len, > > - "Current time : [%lld:%ld]\n" > > - "Last stats reset time: [%lld:%09ld]\n" > > - "Last stats read time: [%lld:%ld]\n" > > - "delta since last reset: [%lld:%ld]\n" > > - "delta since last read: [%lld:%ld]\n", > > - (s64)val1.tv_sec, val1.tv_nsec, > > - (s64)stats->stats_timestamps.last_reset_time.tv_sec, > > - stats->stats_timestamps.last_reset_time.tv_nsec, > > - (s64)stats->stats_timestamps.last_read_time.tv_sec, > > - stats->stats_timestamps.last_read_time.tv_nsec, > > - (s64)timespec64_sub(val1, stats->stats_timestamps.last_reset_time).tv_sec, > > - timespec64_sub(val1, stats->stats_timestamps.last_reset_time).tv_nsec, > > - (s64)timespec64_sub(val1, stats->stats_timestamps.last_read_time).tv_sec, > > - timespec64_sub(val1, stats->stats_timestamps.last_read_time).tv_nsec); > > + "Current time : [%ptSp]\n" > > + "Last stats reset time: [%ptSp]\n" > > + "Last stats read time: [%ptSp]\n" > > + "delta since last reset: [%ptSp]\n" > > + "delta since last read: [%ptSp]\n", > > Both delta times are printed at the end. > > > + &val, > > + &stats->stats_timestamps.last_reset_time, &val1, > > + &stats->stats_timestamps.last_read_time, &val2); > > I think that this should be: > > &stats->stats_timestamps.last_reset_time, > &stats->stats_timestamps.last_read_time, > &val1, &val2); > > > stats->stats_timestamps.last_read_time = val1; > > The original code stored the current time in "val1". This should be: > > stats->stats_timestamps.last_read_time = val; > > > @@ -416,8 +410,8 @@ int fnic_get_stats_data(struct stats_debug_info *debug, > > jiffies_to_timespec64(stats->misc_stats.last_ack_time, &val2); > > Just for record. Another values are stored into @val1 and @val2 at > this point. > > > len += scnprintf(debug->debug_buffer + len, buf_size - len, > > - "Last ISR time: %llu (%8llu.%09lu)\n" > > - "Last ACK time: %llu (%8llu.%09lu)\n" > > + "Last ISR time: %llu (%ptSp)\n" > > + "Last ACK time: %llu (%ptSp)\n" > > "Max ISR jiffies: %llu\n" > > "Max ISR time (ms) (0 denotes < 1 ms): %llu\n" > > "Corr. work done: %llu\n" > > @@ -437,10 +431,8 @@ int fnic_get_stats_data(struct stats_debug_info *debug, > > "Number of rport not ready: %lld\n" > > "Number of receive frame errors: %lld\n" > > "Port speed (in Mbps): %lld\n", > > - (u64)stats->misc_stats.last_isr_time, > > - (s64)val1.tv_sec, val1.tv_nsec, > > - (u64)stats->misc_stats.last_ack_time, > > - (s64)val2.tv_sec, val2.tv_nsec, > > + (u64)stats->misc_stats.last_isr_time, &val1, > > + (u64)stats->misc_stats.last_ack_time, &val2, > > So, this is correct! > > > (u64)atomic64_read(&stats->misc_stats.max_isr_jiffies), > > (u64)atomic64_read(&stats->misc_stats.max_isr_time_ms), > > (u64)atomic64_read(&stats->misc_stats.corr_work_done), > > > Now, I think that there is no need to resend the entire huge patchset. > > I could either fix this when comitting or commit the rest and > you could send only this patch for review. Thank you for the thoroughly done review, I changed that patch between the versions and the problem is that for printf() specifiers (extensions) we do not have an automatic type checking. We starve for a GCC plugin for that, yeah... In any case, if you fold your changes in, I will appreciate that! Otherwise it's also fine with me to send a patch separately later on. > PS: All other patches look good. Well, nobody acked 7th patch yet. > But I think that the change is pretty straightforward and > we could do it even without an ack. This is my understanding as well. It changes the output, but that output is debug anyway. So I don't expect breakage of anything we have an obligation to keep working. -- With Best Regards, Andy Shevchenko