diff options
| author | David Howells <dhowells@redhat.com> | 2024-09-30 12:59:16 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-09-30 14:11:05 +0200 |
| commit | f801850bc263d7fa0a4e6d9a36cddf4966c79c14 (patch) | |
| tree | efcb1f2140322903c805373acc754767d9759662 | |
| parent | 28e8c5c095ec28edeedab5e976e62e0419a89fc1 (diff) | |
netfs: Fix the netfs_folio tracepoint to handle NULL mapping
Fix the netfs_folio tracepoint to handle folios that have a NULL mapping
pointer. In such a case, just substitute a zero inode number.
Fixes: c38f4e96e605 ("netfs: Provide func to copy data to pagecache for buffered write")
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/2917423.1727697556@warthog.procyon.org.uk
cc: Jeff Layton <jlayton@kernel.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
| -rw-r--r-- | include/trace/events/netfs.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/trace/events/netfs.h b/include/trace/events/netfs.h index 76bd42a96815..1d7c52821e55 100644 --- a/include/trace/events/netfs.h +++ b/include/trace/events/netfs.h @@ -448,7 +448,8 @@ TRACE_EVENT(netfs_folio, ), TP_fast_assign( - __entry->ino = folio->mapping->host->i_ino; + struct address_space *__m = READ_ONCE(folio->mapping); + __entry->ino = __m ? __m->host->i_ino : 0; __entry->why = why; __entry->index = folio_index(folio); __entry->nr = folio_nr_pages(folio); |