Unverified Commit f801850b authored by David Howells's avatar David Howells Committed by Christian Brauner
Browse files

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: c38f4e96 ("netfs: Provide func to copy data to pagecache for buffered write")
Signed-off-by: default avatarDavid 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: default avatarChristian Brauner <brauner@kernel.org>
parent 28e8c5c0

include/trace/events/netfs.h

+2 −1
Original line number Diff line number Diff line
@@ -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);