kernel.git/arch/s390/kernel/time.c, branch linux-4.11.y

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:27Z

We are going to split out of , which will have to be picked up from other headers and .c files. Create a trivial placeholder file that just maps to to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

s390: kernel: Audit and remove any unnecessary uses of module.h

2017-02-17T06:40:31Z

Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each change instance for the presence of either and replace as needed. Build testing revealed some implicit header usage that was fixed up accordingly. Signed-off-by: Paul Gortmaker Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/debug: make debug event time stamps relative to the boot TOD clock

2017-02-07T06:27:13Z

The debug features currently uses absolute TOD time stamps for the debug events. Given that the TOD clock can jump forward and backward due to STP sync checks the order of debug events can get obfuscated. Replace the absolute TOD time stamps with a delta to the IPL time stamp. On a STP sync check the TOD clock correction is added to the IPL time stamp as well to make the deltas unaffected by STP sync check. The readout of the debug feature entries will convert the deltas back to absolute time stamps based on the Unix epoch. Signed-off-by: Martin Schwidefsky

s390: use false/true when using bool

2017-01-16T06:27:54Z

Yet another trivial patch to reduce the noise that coccinelle generates. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

clocksource: Use a plain u64 instead of cycle_t

2016-12-25T10:04:12Z

There is no point in having an extra type for extra confusion. u64 is unambiguous. Conversion was done with the following coccinelle script: @rem@ @@ -typedef u64 cycle_t; @fix@ typedef cycle_t; @@ -cycle_t +u64 Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz

Replace with globally

2016-12-24T19:46:01Z

This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*' sed -i -e "s!$PATT!#include !" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro Signed-off-by: Linus Torvalds

s390/time: fix clocksource steering for negative clock offsets

2016-11-17T05:56:38Z

The TOD clock offset injected by an STP sync check can be negative. If the resulting total tod_steering_delta gets negative the kernel will panic. Change the type of tod_steering_delta to a signed type. Reported-by: Dan Carpenter Fixes: 75c7b6f3f6ba ("s390/time: steer clocksource on STP sync events") Signed-off-by: Martin Schwidefsky

s390/time: steer clocksource on STP sync events

2016-10-28T08:09:02Z

On STP sync events the TOD clock will jump in time, either forward or backward. The TOD clocksource claims to be continuous but in case of an STP sync with a negative offset it is not. Subtract the offset injected by the STP sync check from the result of the TOD clocksource to make it continuous again. Add code to drift the offset towards zero with a fixed rate, steering 1 second in ~9 hours. Suggested-by: David Hildenbrand Signed-off-by: Martin Schwidefsky

s390/time: adjust last_update_clock at clock synchronization

2016-10-28T08:09:02Z

The last_update_clock time stamp in the lowcore should be adjusted by the TOD clock delta that is created by the clock synchronization. Otherwise the calculation of the steal time will be incorrect. Signed-off-by: Martin Schwidefsky

s390/time: refactor clock sync

2016-10-28T08:09:02Z

Merge clock_sync_cpu into stp_sync_clock and split out the update of the global and per-CPU clock fields into clock_sync_global and clock_sync_local. Signed-off-by: Martin Schwidefsky