The patch titled Subject: blktrace: make relay callbacks const has been removed from the -mm tree. Its filename was blktrace-make-relay-callbacks-const.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Jani Nikula <jani.nikula@xxxxxxxxx> Subject: blktrace: make relay callbacks const Now that relay_open() accepts const callbacks, make relay callbacks const. Link: https://lkml.kernel.org/r/7ff5ce0b735901eb4f10e13da2704f1d8c4a2507.1606153547.git.jani.nikula@xxxxxxxxx Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Cc: Jens Axboe <axboe@xxxxxxxxx> Cc: Kalle Valo <kvalo@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/trace/blktrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/trace/blktrace.c~blktrace-make-relay-callbacks-const +++ a/kernel/trace/blktrace.c @@ -449,7 +449,7 @@ static struct dentry *blk_create_buf_fil &relay_file_operations); } -static struct rchan_callbacks blk_relay_callbacks = { +static const struct rchan_callbacks blk_relay_callbacks = { .subbuf_start = blk_subbuf_start_callback, .create_buf_file = blk_create_buf_file_callback, .remove_buf_file = blk_remove_buf_file_callback, _ Patches currently in -mm which might be from jani.nikula@xxxxxxxxx are