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From: Nitesh Shetty <nj.shetty@samsung.com>
To: Jens Axboe <axboe@kernel.dk>, Jonathan Corbet <corbet@lwn.net>, Alasdair
	Kergon <agk@redhat.com>, Mike Snitzer <snitzer@kernel.org>, Mikulas Patocka
	<mpatocka@redhat.com>, dm-devel@lists.linux.dev, Keith Busch
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	<sagi@grimberg.me>, Chaitanya Kulkarni <kch@nvidia.com>, Alexander Viro
	<viro@zeniv.linux.org.uk>, Christian Brauner <brauner@kernel.org>
Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org,
	nitheshshetty@gmail.com, anuj1072538@gmail.com, gost.dev@samsung.com,
	mcgrof@kernel.org, Nitesh Shetty <nj.shetty@samsung.com>, Hannes Reinecke
	<hare@suse.de>, Anuj Gupta <anuj20.g@samsung.com>,
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	linux-fsdevel@vger.kernel.org
Subject: [PATCH v19 11/12] null: Enable trace capability for null block
Date: Fri, 22 Dec 2023 11:43:05 +0530
Message-Id: <20231222061313.12260-12-nj.shetty@samsung.com>
In-Reply-To: <20231222061313.12260-1-nj.shetty@samsung.com>
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References: <20231222061313.12260-1-nj.shetty@samsung.com>
	<CGME20231222062237epcas5p4ec8dd02068efc7f0fca133a4241ca308@epcas5p4.samsung.com>

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@suse.de>
Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Anuj Gupta <anuj20.g@samsung.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 3021d58ca51c..1b40c674f62b 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 6b2b370e786f..91446c34eac2 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),
@@ -67,6 +68,7 @@ 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 55c5b48bc276..9694461a31a4 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
-- 
2.35.1.500.gb896f729e2