Subject: Re: linux-next: build failure after merge of the mm tree

From: Matthew Wilcox <[email-masked]>
Date: Tue, 22 Aug 2023 21:20:10 +0100

On Mon, Aug 21, 2023 at 09:00:43PM -0700, Darrick J. Wong wrote:
> Please leave this ^^^ comment, because the need for TRACE_DEFINE_ENUM to
> make enums work in tracepoints is not at all obvious.
> 
> "order %u" to match the (non dev_t) style of the rest of the xfs
> tracepoints.

ACK, thanks.

Andrew, please add this -fix patch for "mm: Remove enum
page_entry_size".

diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 1904eaf7a2e9..fd789e00dfd6 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -802,9 +802,6 @@ DEFINE_INODE_EVENT(xfs_inode_inactivating);
  * ring buffer.  Somehow this was only worth mentioning in the ftrace sample
  * code.
  */
-TRACE_DEFINE_ENUM(PMD_ORDER);
-TRACE_DEFINE_ENUM(PUD_ORDER);
-
 TRACE_DEFINE_ENUM(XFS_REFC_DOMAIN_SHARED);
 TRACE_DEFINE_ENUM(XFS_REFC_DOMAIN_COW);
 
@@ -823,13 +820,10 @@ TRACE_EVENT(xfs_filemap_fault,
 		__entry->order = order;
 		__entry->write_fault = write_fault;
 	),
-	TP_printk("dev %d:%d ino 0x%llx %s write_fault %d",
+	TP_printk("dev %d:%d ino 0x%llx order %u write_fault %d",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  __entry->ino,
-		  __print_symbolic(__entry->order,
-			{ 0,		"PTE" },
-			{ PMD_ORDER,	"PMD" },
-			{ PUD_ORDER,	"PUD" }),
+		  __entry->order,
 		  __entry->write_fault)
 )