linux-kernel - [PATCH v20 11/12] null: Enable trace capability for null block

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Message-Id: <20240520102033.9361-12-nj.shetty@samsung.com>
Date: Mon, 20 May 2024 15:50:24 +0530
From: Nitesh Shetty <nj.shetty@...sung.com>
To: Jens Axboe <axboe@...nel.dk>, Jonathan Corbet <corbet@....net>, Alasdair
	Kergon <agk@...hat.com>, Mike Snitzer <snitzer@...nel.org>, Mikulas Patocka
	<mpatocka@...hat.com>, Keith Busch <kbusch@...nel.org>, Christoph Hellwig
	<hch@....de>, Sagi Grimberg <sagi@...mberg.me>, Chaitanya Kulkarni
	<kch@...dia.com>, Alexander Viro <viro@...iv.linux.org.uk>, Christian
	Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>
Cc: martin.petersen@...cle.com, bvanassche@....org, david@...morbit.com,
	hare@...e.de, damien.lemoal@...nsource.wdc.com, anuj20.g@...sung.com,
	joshi.k@...sung.com, nitheshshetty@...il.com, gost.dev@...sung.com, Nitesh
	Shetty <nj.shetty@...sung.com>, linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	dm-devel@...ts.linux.dev, linux-nvme@...ts.infradead.org,
	linux-fsdevel@...r.kernel.org
Subject: [PATCH v20 11/12] null: Enable trace capability for null block

This is a prep patch to enable copy trace capability.
At present only zoned null_block is using trace, so we decoupled trace
and zoned dependency to make it usable in null_blk driver also.

Reviewed-by: Hannes Reinecke <hare@...e.de>
Signed-off-by: Nitesh Shetty <nj.shetty@...sung.com>
Signed-off-by: Anuj Gupta <anuj20.g@...sung.com>
---
 drivers/block/null_blk/Makefile | 2 --
 drivers/block/null_blk/main.c   | 3 +++
 drivers/block/null_blk/trace.h  | 2 ++
 drivers/block/null_blk/zoned.c  | 1 -
 4 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/block/null_blk/Makefile b/drivers/block/null_blk/Makefile
index 84c36e512ab8..672adcf0ad24 100644
--- a/drivers/block/null_blk/Makefile
+++ b/drivers/block/null_blk/Makefile
@@ -5,7 +5,5 @@ ccflags-y			+= -I$(src)
 
 obj-$(CONFIG_BLK_DEV_NULL_BLK)	+= null_blk.o
 null_blk-objs			:= main.o
-ifeq ($(CONFIG_BLK_DEV_ZONED), y)
 null_blk-$(CONFIG_TRACING) 	+= trace.o
-endif
 null_blk-$(CONFIG_BLK_DEV_ZONED) += zoned.o
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index 5d56ad4ce01a..b33b9ebfebd2 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -11,6 +11,9 @@
 #include <linux/init.h>
 #include "null_blk.h"
 
+#define CREATE_TRACE_POINTS
+#include "trace.h"
+
 #undef pr_fmt
 #define pr_fmt(fmt)	"null_blk: " fmt
 
diff --git a/drivers/block/null_blk/trace.h b/drivers/block/null_blk/trace.h
index 82b8f6a5e5f0..f9eadac6b22f 100644
--- a/drivers/block/null_blk/trace.h
+++ b/drivers/block/null_blk/trace.h
@@ -30,6 +30,7 @@ static inline void __assign_disk_name(char *name, struct gendisk *disk)
 }
 #endif
 
+#ifdef CONFIG_BLK_DEV_ZONED
 TRACE_EVENT(nullb_zone_op,
 	    TP_PROTO(struct nullb_cmd *cmd, unsigned int zone_no,
 		     unsigned int zone_cond),
@@ -73,6 +74,7 @@ TRACE_EVENT(nullb_report_zones,
 	    TP_printk("%s nr_zones=%u",
 		      __print_disk_name(__entry->disk), __entry->nr_zones)
 );
+#endif /* CONFIG_BLK_DEV_ZONED */
 
 #endif /* _TRACE_NULLB_H */
 
diff --git a/drivers/block/null_blk/zoned.c b/drivers/block/null_blk/zoned.c
index 5b5a63adacc1..47470a732d21 100644
--- a/drivers/block/null_blk/zoned.c
+++ b/drivers/block/null_blk/zoned.c
@@ -3,7 +3,6 @@
 #include <linux/bitmap.h>
 #include "null_blk.h"
 
-#define CREATE_TRACE_POINTS
 #include "trace.h"
 
 #undef pr_fmt
-- 
2.17.1