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sponding PTP_SYS_OFFSET_PRECISE ioctl allows the driver to perform this device/system correlation when for example cross timestamp hardware is available. Modern Intel systems can do this for onboard Ethernet controllers using the ART counter. There is virtually zero latency between captures of the ART and network device clock. The capabilities ioctl (PTP_CLOCK_GETCAPS), is augmented allowing applications to query whether or not drivers implement the getcrosststamp callback, providing more precise cross timestamping. Cc: Prarit Bhargava <prarit@redhat.com> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: kevin.b.stanton@intel.com Cc: kevin.j.clarke@intel.com Cc: hpa@zytor.com Cc: jeffrey.t.kirsher@intel.com Cc: netdev@vger.kernel.org Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: Christopher S. Hall <christopher.s.hall@intel.com> [jstultz: Commit subject tweaks] Signed-off-by: John Stultz <john.stultz@linaro.org> 2016-02-17Documentation: Fix int/unsigned int comparisonMahesh Khanwalkar Signed int - unsigned int comparison fixed in mpssd, prctl, ptp, and timers in Documentation. In places where 'int argc' and 'const char **argv' are not used, they are replaced with void Documentation/mic/mpssd/mpssd.c: Fixed comparison in sum_iovec_len and disp_iovec Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c: main signature changed to void, as parameters 'argc' and 'argv' are never used Documentation/prctl/disable-tsc-on-off-stress-test.c: main signature changed to void Documentation/prctl/disable-tsc-test.c: main signature changed to void Documentation/ptp/testptp.c: Sign comparison fix Documentation/timers/hpet_example.c: Sign comparision fix Signed-off-by: Mahesh Khanwalkar <maheshkhanwalkar@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> 2015-09-29testptp: Silence compiler warnings on ppc64Thomas Huth When compiling Documentation/ptp/testptp.c the following compiler warnings are printed out: Documentation/ptp/testptp.c: In function ‘main’: Documentation/ptp/testptp.c:367:11: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘__s64’ [-Wformat=] event.t.sec, event.t.nsec); ^ Documentation/ptp/testptp.c:505:5: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘__s64’ [-Wformat=] (pct+2*i)->sec, (pct+2*i)->nsec); ^ Documentation/ptp/testptp.c:507:5: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘__s64’ [-Wformat=] (pct+2*i+1)->sec, (pct+2*i+1)->nsec); ^ Documentation/ptp/testptp.c:509:5: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘__s64’ [-Wformat=] (pct+2*i+2)->sec, (pct+2*i+2)->nsec); This happens because __s64 is by default defined as "long" on ppc64, not as "long long". However, to fix these warnings, it's possible to define the __SANE_USERSPACE_TYPES__ so that __s64 gets defined to "long long" on ppc64, too. Signed-off-by: Thomas Huth <thuth@redhat.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2014-10-24ptp: restore the makefile for building the test program.Richard Cochran This patch brings back the makefile called testptp.mk which was removed in commit adb19fb66eee (Documentation: add makefiles for more targets). While the idea of that commit was to improve build coverage of the examples, the new Makefile is unable to cross compile the testptp program. In contrast, the deleted makefile was able to do this just fine. This patch fixes the regression by restoring the original makefile. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Acked-by: Peter Foley <pefoley2@pefoley.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2014-09-26Documentation: update .gitignore filesPeter Foley Add some missing files to .gitignore. Push Documentation/.gitignore down into subdirectories. Signed-off-by: Peter Foley <pefoley2@pefoley.com> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz> 2014-09-26Documentation: fix misc. warningsPeter Foley Fix a few warnings that gcc emits during a default build. Signed-off-by: Peter Foley <pefoley2@pefoley.com> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz> 2014-09-26Documentation: add makefiles for more targetsPeter Foley Add a bunch of previously unbuilt source files to the Documentation build machinery. Signed-off-by: Peter Foley <pefoley2@pefoley.com> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz> 2014-06-16ptp: In the testptp utility, use clock_adjtime from glibc when availableChristian Riesch clock_adjtime was included in glibc 2.14. _GNU_SOURCE must be defined to make it available. Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Cc: Richard Cochran <richardcochran@gmail.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2014-03-27ptp: Fix compiler warnings in the testptp utilityChristian Riesch Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Cc: Dong Zhu <bluezhudong@gmail.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2014-03-27Revert "ptp: Fix compiler warnings in the testptp utility"David S. Miller This reverts commit 203191c386e83b8c5d95bbbaef13baa629512726. A better version of this fix is forthcoming. Signed-off-by: David S. Miller <davem@davemloft.net> 2014-03-26ptp: Fix compiler warnings in the testptp utilityChristian Riesch Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Cc: Dong Zhu <bluezhudong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2014-03-26ptp: Add a command line option in testptp to set a specific PTP timeManfred Rudigier Signed-off-by: Manfred Rudigier <manfred.rudigier@omicron.at> Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2014-03-21ptp: add the pin GET/SETFUNC ioctls to the testptp program.Richard Cochran This patch adds a option to the test program that lists the programmable pins on a PTP Hardware Clock device, assuming there are any such pins. A second option lets the user reprogram the auxiliary function of a single pin. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2014-02-04ptp: Allow selecting trigger/event index in testptpStefan Sørensen Currently the trigger/event is hardcoded to 0, this patch adds a new command line argument -i to select an arbitrary trigger/ event. Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>