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| author |   Thomas Richter <tmricht@linux.ibm.com> | 2018-07-03 09:41:12 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-07-23 13:49:52 +0200 |
| commit | 661c959bae317bf3c61e438ffffec92fc9ad38e2 (patch) | |
| tree | b2c1a2f59c74f8cb7c2408858c6e75654eed6757 /drivers/s390/cio/trace.h | |
| parent | s390/tape: replace PTR_RET with PTR_ERR_OR_ZERO (diff) | |
| download | linux-dev-661c959bae317bf3c61e438ffffec92fc9ad38e2.tar.xz linux-dev-661c959bae317bf3c61e438ffffec92fc9ad38e2.zip | |
s390 cio: Rewrite trace point in s390_cio_interrupt
Tools like 'perf stat' parse the trace point format files defined
in /sys/kernel/debug/tracing/events/s390/.../format to handle
the print fmt: statement. The kernel provides a library in
directory linux/tools/lib/traceevent/* for this reason.
This library can not handle structures or unions defined in
the TRACE_EVENT/TP_STRUCT__entry macros with __field_struct macro.
There is no possibility to extract a structure member
(which might be a bit field) since there is no packing
information nor bit field offset by parsing the printf fmt line.
Therefore rewrite the TRACE_EVENT macro and add the
__field macro for the necessary fields.
Keep the __fieldstruct macro to extract the complete
structure when dumps are analysed.
Note that the same information is displayed, this is no
interface change.
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Acked-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/trace.h')
| -rw-r--r-- | drivers/s390/cio/trace.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/s390/cio/trace.h b/drivers/s390/cio/trace.h index 1f8d1c1e566d..ab0144c8a7d3 100644 --- a/drivers/s390/cio/trace.h +++ b/drivers/s390/cio/trace.h @@ -299,16 +299,20 @@ TRACE_EVENT(s390_cio_interrupt, __field(u8, cssid) __field(u8, ssid) __field(u16, schno) + __field(u8, isc) + __field(u8, type) ), TP_fast_assign( __entry->tpi_info = *tpi_info; - __entry->cssid = __entry->tpi_info.schid.cssid; - __entry->ssid = __entry->tpi_info.schid.ssid; - __entry->schno = __entry->tpi_info.schid.sch_no; + __entry->cssid = tpi_info->schid.cssid; + __entry->ssid = tpi_info->schid.ssid; + __entry->schno = tpi_info->schid.sch_no; + __entry->isc = tpi_info->isc; + __entry->type = tpi_info->type; ), TP_printk("schid=%x.%x.%04x isc=%d type=%d", __entry->cssid, __entry->ssid, __entry->schno, - __entry->tpi_info.isc, __entry->tpi_info.type + __entry->isc, __entry->type ) ); |