From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Wed, 27 Feb 2019 23:13:45 +0000 (-0600)
Subject: xfs: fix symbolic enum printing in ftrace output
X-Git-Tag: v5.0.0-rc1~59
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3eb6b5635b6a191d48d4dbfe00acd8cbd5dffe41;p=thirdparty%2Fxfsprogs-dev.git

xfs: fix symbolic enum printing in ftrace output

Source kernel commit: 85f8dff00a3193fe5659aa4c91adde31723c0d3d

ftrace's __print_symbolic() has a (very poorly documented) requirement
that any enum values used in the symbol to string translation table be
wrapped in a TRACE_DEFINE_ENUM so that the enum value can be encoded in
the ftrace ring buffer.  Fix this unsatisfied requirement.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
---

diff --git a/libxfs/xfs_types.h b/libxfs/xfs_types.h
index b9e6c8928..9a6541872 100644
--- a/libxfs/xfs_types.h
+++ b/libxfs/xfs_types.h
@@ -100,6 +100,10 @@ typedef void *		xfs_failaddr_t;
  */
 #define MAXNAMELEN	256
 
+/*
+ * This enum is used in string mapping in xfs_trace.h; please keep the
+ * TRACE_DEFINE_ENUMs for it up to date.
+ */
 typedef enum {
 	XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
 } xfs_lookup_t;