Re: [PATCH 7/7] cxl/trace: Enclose a multiple statements macro in a do while loop

[Jeongtae Park]

On Thu, Sep 21, 2023 at 03:58:26PM -0700, Dave Jiang wrote:
> 
> 
> On 9/20/23 19:51, Jeongtae Park wrote:
> > ERROR: Macros with complex values should be enclosed in parentheses
> > 
> > Signed-off-by: Jeongtae Park <jtp.park@xxxxxxxxxxx>
> 
> I think that goes against typical traceevent macros layout. I would ignore checkpatch warnings on traceevent stuff. 
> 
>

Ok, I see, I will drop this change.

> > ---
> >  drivers/cxl/core/trace.h | 24 +++++++++++++-----------
> >  1 file changed, 13 insertions(+), 11 deletions(-)
> > 
> > diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
> > index 7aee7fb008a5..e2338773dcd6 100644
> > --- a/drivers/cxl/core/trace.h
> > +++ b/drivers/cxl/core/trace.h
> > @@ -199,17 +199,19 @@ TRACE_EVENT(cxl_overflow,
> >  	__field(u8, hdr_maint_op_class)
> >  
> >  #define CXL_EVT_TP_fast_assign(cxlmd, l, hdr)					\
> > -	__assign_str(memdev, dev_name(&(cxlmd)->dev));				\
> > -	__assign_str(host, dev_name((cxlmd)->dev.parent));			\
> > -	__entry->log = (l);							\
> > -	__entry->serial = (cxlmd)->cxlds->serial;				\
> > -	memcpy(&__entry->hdr_uuid, &(hdr).id, sizeof(uuid_t));			\
> > -	__entry->hdr_length = (hdr).length;					\
> > -	__entry->hdr_flags = get_unaligned_le24((hdr).flags);			\
> > -	__entry->hdr_handle = le16_to_cpu((hdr).handle);			\
> > -	__entry->hdr_related_handle = le16_to_cpu((hdr).related_handle);	\
> > -	__entry->hdr_timestamp = le64_to_cpu((hdr).timestamp);			\
> > -	__entry->hdr_maint_op_class = (hdr).maint_op_class
> > +	do {									\
> > +	    __assign_str(memdev, dev_name(&(cxlmd)->dev));			\
> > +	    __assign_str(host, dev_name((cxlmd)->dev.parent));			\
> > +	    __entry->log = (l);							\
> > +	    __entry->serial = (cxlmd)->cxlds->serial;				\
> > +	    memcpy(&__entry->hdr_uuid, &(hdr).id, sizeof(uuid_t));		\
> > +	    __entry->hdr_length = (hdr).length;					\
> > +	    __entry->hdr_flags = get_unaligned_le24((hdr).flags);		\
> > +	    __entry->hdr_handle = le16_to_cpu((hdr).handle);			\
> > +	    __entry->hdr_related_handle = le16_to_cpu((hdr).related_handle);	\
> > +	    __entry->hdr_timestamp = le64_to_cpu((hdr).timestamp);		\
> > +	    __entry->hdr_maint_op_class = (hdr).maint_op_class;			\
> > +	} while (0)
> >  
> >  #define CXL_EVT_TP_printk(fmt, ...) \
> >  	TP_printk("memdev=%s host=%s serial=%lld log=%s : time=%llu uuid=%pUb "	\