linux-kernel - Re: related to fixing depreciated api

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Date:   Wed, 16 Dec 2020 04:32:48 +0530
From:   Jeffrin Jose T <jeffrin@...agiritech.edu.in>
To:     Shuah Khan <skhan@...uxfoundation.org>,
        Shuah Khan <shuah@...nel.org>
Cc:     "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: related to fixing depreciated api

On Tue, 2020-12-15 at 12:52 -0700, Shuah Khan wrote:
> On 12/15/20 9:12 AM, Shuah Khan wrote:
> > On 12/14/20 9:42 AM, Jeffrin Jose T wrote:
> > > hello,
> > > 
> > > i have worked on to  fix  depreciated api issue from
> > > tools/testing/selftests/intel_pstate/aerf.c
> > > 
> > > i met with the following error related...
> > > 
> > > --------------x------------------x----------------->
> > > $pwd
> > > /home/jeffrin/UP/linux-
> > > kselftest/tools/testing/selftests/intel_pstate
> > > $make
> > > gcc  -Wall -D_GNU_SOURCE    aperf.c /home/jeffrin/UP/linux-
> > > kselftest/tools/testing/selftests/kselftest_harness.h
> > > /home/jeffrin/UP/linux-
> > > kselftest/tools/testing/selftests/kselftest.h -
> > > lm -o /home/jeffrin/UP/linux-
> > > kselftest/tools/testing/selftests/intel_pstate/aperf
> > > aperf.c: In function ‘main’:
> > > aperf.c:58:2: warning: ‘ftime’ is deprecated [-Wdeprecated-
> > > declarations]
> > >     58 |  ftime(&before);
> > >        |  ^~~~~
> > > In file included from aperf.c:9:
> > > /usr/include/x86_64-linux-gnu/sys/timeb.h:39:12: note: declared
> > > here
> > >     39 | extern int ftime (struct timeb *__timebuf)
> > >        |            ^~~~~
> > > aperf.c:67:2: warning: ‘ftime’ is deprecated [-Wdeprecated-
> > > declarations]
> > >     67 |  ftime(&after);
> > >        |  ^~~~~
> > > In file included from aperf.c:9:
> > > /usr/include/x86_64-linux-gnu/sys/timeb.h:39:12: note: declared
> > > here
> > >     39 | extern int ftime (struct timeb *__timebuf)
> > >        |            ^~~~~
> > > $
> > > ----------------x---------------x---------------------->
> > > 
> > > 
> > > from ftime manual  i found that it is depreciated...
> > > 
> > > This  function is deprecated, and will be removed in a future
> > > version
> > > of the GNU C library.  Use clock_gettime(2) instead.
> > > 
> > > 
> > > now clock_gettime  gives  new data structure.
> > > 
> > >   struct timespec {
> > >                 time_t   tv_sec;        /* seconds */
> > >                 long     tv_nsec;       /* nanoseconds */
> > >             };
> > > 
> > > 
> > > i worked on with the new data structure and some errors that came
> > > along.
> > > typical final output looks good but  values of runtime and
> > > typical
> > > frequency
> > > does not look normal during "sudo bash run.sh".
> > > 
> > > output of "git diff" and  a  portion of output of   "sudo bash
> > > run.sh".
> > > is attached.
> > > 
> > 
> > Please send a proper patch to fix intel_pstate to use
> > clock_gettime.
> > 
> 
> The fix for this is already in next - no need to send patch.
> 
> thanks,
> -- Shuah
> 
anyway thanks .


-- 
software engineer
rajagiri school of engineering and technology - autonomous