diff mbox series

[2/2] cxl/trace: Remove unnecessary memcpy's

Message ID 20240131-cxl-cper-fixups-v1-2-335c85b1d77b@intel.com
State New
Headers
Series cxl/cper: Fixes for CXL CPER event processing |

Commit Message

Ira Weiny Jan. 31, 2024, 11:55 p.m. UTC 
  CPER events don't have UUIDs.  Therefore UUIDs were removed from the
records passed to trace events and replaced with hard coded values.

As pointed out by Jonathan, the new defines for the UUIDs present a more
efficient way to assign UUID in trace records.[1]

Replace memcpy's with the use of static data.

[1] https://lore.kernel.org/all/20240108132325.00000e9c@Huawei.com/

Suggested-by: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 drivers/cxl/core/trace.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Alison Schofield Feb. 1, 2024, 1:17 a.m. UTC | #1 
On Wed, Jan 31, 2024 at 03:55:39PM -0800, Ira Weiny wrote:
> CPER events don't have UUIDs.  Therefore UUIDs were removed from the
> records passed to trace events and replaced with hard coded values.
> 
> As pointed out by Jonathan, the new defines for the UUIDs present a more
> efficient way to assign UUID in trace records.[1]
> 
> Replace memcpy's with the use of static data.

Reviewed-by: Alison Schofield <alison.schofield@intel.com>


> 
> [1] https://lore.kernel.org/all/20240108132325.00000e9c@Huawei.com/
> 
> Suggested-by: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> ---
>  drivers/cxl/core/trace.h | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
> index 89445435303a..bdf117a33744 100644
> --- a/drivers/cxl/core/trace.h
> +++ b/drivers/cxl/core/trace.h
> @@ -338,7 +338,7 @@ TRACE_EVENT(cxl_general_media,
>  
>  	TP_fast_assign(
>  		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
> -		memcpy(&__entry->hdr_uuid, &CXL_EVENT_GEN_MEDIA_UUID, sizeof(uuid_t));
> +		__entry->hdr_uuid = CXL_EVENT_GEN_MEDIA_UUID;
>  
>  		/* General Media */
>  		__entry->dpa = le64_to_cpu(rec->phys_addr);
> @@ -425,7 +425,7 @@ TRACE_EVENT(cxl_dram,
>  
>  	TP_fast_assign(
>  		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
> -		memcpy(&__entry->hdr_uuid, &CXL_EVENT_DRAM_UUID, sizeof(uuid_t));
> +		__entry->hdr_uuid = CXL_EVENT_DRAM_UUID;
>  
>  		/* DRAM */
>  		__entry->dpa = le64_to_cpu(rec->phys_addr);
> @@ -573,7 +573,7 @@ TRACE_EVENT(cxl_memory_module,
>  
>  	TP_fast_assign(
>  		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
> -		memcpy(&__entry->hdr_uuid, &CXL_EVENT_MEM_MODULE_UUID, sizeof(uuid_t));
> +		__entry->hdr_uuid = CXL_EVENT_MEM_MODULE_UUID;
>  
>  		/* Memory Module Event */
>  		__entry->event_type = rec->event_type;
> 
> -- 
> 2.43.0
>
Jonathan Cameron Feb. 1, 2024, 11:23 a.m. UTC | #2 
On Wed, 31 Jan 2024 17:17:55 -0800
Alison Schofield <alison.schofield@intel.com> wrote:

> On Wed, Jan 31, 2024 at 03:55:39PM -0800, Ira Weiny wrote:
> > CPER events don't have UUIDs.  Therefore UUIDs were removed from the
> > records passed to trace events and replaced with hard coded values.
> > 
> > As pointed out by Jonathan, the new defines for the UUIDs present a more
> > efficient way to assign UUID in trace records.[1]
> > 
> > Replace memcpy's with the use of static data.  
> 
> Reviewed-by: Alison Schofield <alison.schofield@intel.com>

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> 
> 
> > 
> > [1] https://lore.kernel.org/all/20240108132325.00000e9c@Huawei.com/
> > 
> > Suggested-by: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> > ---
> >  drivers/cxl/core/trace.h | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
> > index 89445435303a..bdf117a33744 100644
> > --- a/drivers/cxl/core/trace.h
> > +++ b/drivers/cxl/core/trace.h
> > @@ -338,7 +338,7 @@ TRACE_EVENT(cxl_general_media,
> >  
> >  	TP_fast_assign(
> >  		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
> > -		memcpy(&__entry->hdr_uuid, &CXL_EVENT_GEN_MEDIA_UUID, sizeof(uuid_t));
> > +		__entry->hdr_uuid = CXL_EVENT_GEN_MEDIA_UUID;
> >  
> >  		/* General Media */
> >  		__entry->dpa = le64_to_cpu(rec->phys_addr);
> > @@ -425,7 +425,7 @@ TRACE_EVENT(cxl_dram,
> >  
> >  	TP_fast_assign(
> >  		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
> > -		memcpy(&__entry->hdr_uuid, &CXL_EVENT_DRAM_UUID, sizeof(uuid_t));
> > +		__entry->hdr_uuid = CXL_EVENT_DRAM_UUID;
> >  
> >  		/* DRAM */
> >  		__entry->dpa = le64_to_cpu(rec->phys_addr);
> > @@ -573,7 +573,7 @@ TRACE_EVENT(cxl_memory_module,
> >  
> >  	TP_fast_assign(
> >  		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
> > -		memcpy(&__entry->hdr_uuid, &CXL_EVENT_MEM_MODULE_UUID, sizeof(uuid_t));
> > +		__entry->hdr_uuid = CXL_EVENT_MEM_MODULE_UUID;
> >  
> >  		/* Memory Module Event */
> >  		__entry->event_type = rec->event_type;
> > 
> > -- 
> > 2.43.0
> >   
>
Dave Jiang Feb. 1, 2024, 4:16 p.m. UTC | #3 
On 1/31/24 16:55, Ira Weiny wrote:
> CPER events don't have UUIDs.  Therefore UUIDs were removed from the
> records passed to trace events and replaced with hard coded values.
> 
> As pointed out by Jonathan, the new defines for the UUIDs present a more
> efficient way to assign UUID in trace records.[1]
> 
> Replace memcpy's with the use of static data.
> 
> [1] https://lore.kernel.org/all/20240108132325.00000e9c@Huawei.com/
> 
> Suggested-by: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Reviewed-by: Dave Jiang <dave.jiang@intel.com>
> ---
>  drivers/cxl/core/trace.h | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
> index 89445435303a..bdf117a33744 100644
> --- a/drivers/cxl/core/trace.h
> +++ b/drivers/cxl/core/trace.h
> @@ -338,7 +338,7 @@ TRACE_EVENT(cxl_general_media,
>  
>  	TP_fast_assign(
>  		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
> -		memcpy(&__entry->hdr_uuid, &CXL_EVENT_GEN_MEDIA_UUID, sizeof(uuid_t));
> +		__entry->hdr_uuid = CXL_EVENT_GEN_MEDIA_UUID;
>  
>  		/* General Media */
>  		__entry->dpa = le64_to_cpu(rec->phys_addr);
> @@ -425,7 +425,7 @@ TRACE_EVENT(cxl_dram,
>  
>  	TP_fast_assign(
>  		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
> -		memcpy(&__entry->hdr_uuid, &CXL_EVENT_DRAM_UUID, sizeof(uuid_t));
> +		__entry->hdr_uuid = CXL_EVENT_DRAM_UUID;
>  
>  		/* DRAM */
>  		__entry->dpa = le64_to_cpu(rec->phys_addr);
> @@ -573,7 +573,7 @@ TRACE_EVENT(cxl_memory_module,
>  
>  	TP_fast_assign(
>  		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
> -		memcpy(&__entry->hdr_uuid, &CXL_EVENT_MEM_MODULE_UUID, sizeof(uuid_t));
> +		__entry->hdr_uuid = CXL_EVENT_MEM_MODULE_UUID;
>  
>  		/* Memory Module Event */
>  		__entry->event_type = rec->event_type;
>
diff mbox series

Patch

diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
index 89445435303a..bdf117a33744 100644
--- a/drivers/cxl/core/trace.h
+++ b/drivers/cxl/core/trace.h
@@ -338,7 +338,7 @@  TRACE_EVENT(cxl_general_media,
 
 	TP_fast_assign(
 		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
-		memcpy(&__entry->hdr_uuid, &CXL_EVENT_GEN_MEDIA_UUID, sizeof(uuid_t));
+		__entry->hdr_uuid = CXL_EVENT_GEN_MEDIA_UUID;
 
 		/* General Media */
 		__entry->dpa = le64_to_cpu(rec->phys_addr);
@@ -425,7 +425,7 @@  TRACE_EVENT(cxl_dram,
 
 	TP_fast_assign(
 		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
-		memcpy(&__entry->hdr_uuid, &CXL_EVENT_DRAM_UUID, sizeof(uuid_t));
+		__entry->hdr_uuid = CXL_EVENT_DRAM_UUID;
 
 		/* DRAM */
 		__entry->dpa = le64_to_cpu(rec->phys_addr);
@@ -573,7 +573,7 @@  TRACE_EVENT(cxl_memory_module,
 
 	TP_fast_assign(
 		CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr);
-		memcpy(&__entry->hdr_uuid, &CXL_EVENT_MEM_MODULE_UUID, sizeof(uuid_t));
+		__entry->hdr_uuid = CXL_EVENT_MEM_MODULE_UUID;
 
 		/* Memory Module Event */
 		__entry->event_type = rec->event_type;