[PATCH] btrfs: add device scanned-by process name in the scan message

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Its very helpful if we had logged the device scanner process name
to debug the race condition between the systemd-udevd scan and the
user initiated device forget command.

This patch adds scanned-by process name to the scan message.

Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
---
 fs/btrfs/volumes.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 788271649726..2c4c89bfafd1 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1011,11 +1011,11 @@ static noinline struct btrfs_device *device_list_add(const char *path,
 		*new_device_added = true;
 
 		if (disk_super->label[0])
-			pr_info("BTRFS: device label %s devid %llu transid %llu %s\n",
-				disk_super->label, devid, found_transid, path);
+			pr_info("BTRFS: device label %s devid %llu transid %llu %s scanned-by %s\n",
+				disk_super->label, devid, found_transid, path, current->comm);
 		else
-			pr_info("BTRFS: device fsid %pU devid %llu transid %llu %s\n",
-				disk_super->fsid, devid, found_transid, path);
+			pr_info("BTRFS: device fsid %pU devid %llu transid %llu %s scanned-by %s\n",
+				disk_super->fsid, devid, found_transid, path, current->comm);
 
 	} else if (!device->name || strcmp(device->name->str, path)) {
 		/*
-- 
1.8.3.1




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