[PATCH 01/25] xfs: add a per-xfs trace_printk macro

Darrick J. Wong
2018-10-10T00:10:45Z

Add a "xfs_tprintk" macro so that developers can use trace_printk to
print out arbitrary debugging information with the XFS device name
attached to the trace output.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/xfs_error.h | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index 246d3e989c6c..c3d9546b138c 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -99,4 +99,9 @@ extern int xfs_errortag_clearall(struct xfs_mount *mp);
#define XFS_PTAG_SHUTDOWN_LOGERROR 0x00000040
#define XFS_PTAG_FSBLOCK_ZERO 0x00000080

+/* trace printk version of xfs_err and friends */
+#define xfs_tprintk(mp, fmt, args...) \
+ trace_printk("dev %d:%d " fmt, MAJOR((mp)->m_super->s_dev), \
+ MINOR((mp)->m_super->s_dev), ##args)
+
#endif /* __XFS_ERROR_H__ */