[lttng-dev] [PATCH lttng-modules stable-2.10] fix: missing 'lttng_fs_info_fsid' wrapper in btrfs backport

Michael Jeanson mjeanson at efficios.com
Wed Dec 11 15:29:17 EST 2019

The following backported patch was missing the use of the
'lttng_fs_info_fsid' wrapper to enable compatibility with upstream
stable kernels.

  commit 065436fd07d58a9a17427ad386ffcc8d29e25a9d
  Author: Michael Jeanson <mjeanson at efficios.com>
  Date:   Mon Jun 18 14:53:18 2018 -0400

    Fix: btrfs: use fs_info for btrfs_handle_em_exist tracepoint

    See upstream commit:

      commit f46b24c9457143a367c6707eac82d546e2bcf280
      Author: David Sterba <dsterba at suse.com>
      Date:   Tue Apr 3 21:45:57 2018 +0200

        btrfs: use fs_info for btrfs_handle_em_exist tracepoint

        We really want to know to which filesystem the extent map events belong,
        but as it cannot be reached from the extent_map pointers, we need to
        pass it down the callchain.

    Signed-off-by: Michael Jeanson <mjeanson at efficios.com>
    Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>

Signed-off-by: Michael Jeanson <mjeanson at efficios.com>
 instrumentation/events/lttng-module/btrfs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/instrumentation/events/lttng-module/btrfs.h b/instrumentation/events/lttng-module/btrfs.h
index fbedd6c..c8c494a 100644
--- a/instrumentation/events/lttng-module/btrfs.h
+++ b/instrumentation/events/lttng-module/btrfs.h
@@ -318,7 +318,7 @@ LTTNG_TRACEPOINT_EVENT(btrfs_handle_em_exist,
 	TP_ARGS(fs_info, existing, map, start, len),
-		ctf_array(u8, fsid, fs_info->fsid, BTRFS_UUID_SIZE)
+		ctf_array(u8, fsid, lttng_fs_info_fsid, BTRFS_UUID_SIZE)
 		ctf_integer(u64, e_start, existing->start)
 		ctf_integer(u64, e_len, existing->len)
 		ctf_integer(u64, map_start, map->start)

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