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| author | Thomas Richter <tmricht@linux.ibm.com> | 2018-07-11 11:27:12 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-07-23 14:49:54 +0300 |
| commit | 67faae15675aac8327b094677a830fdffb7dd68d (patch) | |
| tree | c18e592e4fe4dcda5c9354e6ed9b1b506ffadb2e /drivers/s390 | |
| parent | 5925e819274260bb48e10a2fc6d22b996d1e135f (diff) | |
| download | linux-67faae15675aac8327b094677a830fdffb7dd68d.tar.xz | |
s390 cio: Rewrite trace point in s390_cio_stcrw
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
the __field macro for the missing members.
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')
| -rw-r--r-- | drivers/s390/cio/trace.h | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/s390/cio/trace.h b/drivers/s390/cio/trace.h index 5c06b680471e..baff0303533e 100644 --- a/drivers/s390/cio/trace.h +++ b/drivers/s390/cio/trace.h @@ -349,16 +349,30 @@ TRACE_EVENT(s390_cio_stcrw, TP_STRUCT__entry( __field_struct(struct crw, crw) __field(int, cc) + __field(u8, slct) + __field(u8, oflw) + __field(u8, chn) + __field(u8, rsc) + __field(u8, anc) + __field(u8, erc) + __field(u16, rsid) ), TP_fast_assign( __entry->crw = *crw; __entry->cc = cc; + __entry->slct = crw->slct; + __entry->oflw = crw->oflw; + __entry->chn = crw->chn; + __entry->rsc = crw->rsc; + __entry->anc = crw->anc; + __entry->erc = crw->erc; + __entry->rsid = crw->rsid; ), TP_printk("cc=%d slct=%d oflw=%d chn=%d rsc=%d anc=%d erc=0x%x " "rsid=0x%x", - __entry->cc, __entry->crw.slct, __entry->crw.oflw, - __entry->crw.chn, __entry->crw.rsc, __entry->crw.anc, - __entry->crw.erc, __entry->crw.rsid + __entry->cc, __entry->slct, __entry->oflw, + __entry->chn, __entry->rsc, __entry->anc, + __entry->erc, __entry->rsid ) ); |