Commit 5bd4990f authored by David Howells's avatar David Howells Committed by Jens Axboe
Browse files

trace: Convert trace/seq to use copy_splice_read() 



For the splice from the trace seq buffer, just use copy_splice_read().

In the future, something better can probably be done by gifting pages from
seq->buf into the pipe, but that would require changing seq->buf into a
vmap over an array of pages.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Steven Rostedt <rostedt@goodmis.org>
cc: Masami Hiramatsu <mhiramat@kernel.org>
cc: linux-kernel@vger.kernel.org
cc: linux-trace-kernel@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-block@vger.kernel.org
cc: linux-mm@kvack.org
Link: https://lore.kernel.org/r/20230522135018.2742245-27-dhowells@redhat.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 6ef48ec3

kernel/trace/trace.c

+1 −1
Original line number Diff line number Diff line
@@ -5171,7 +5171,7 @@ static const struct file_operations tracing_fops = { 
	.open		= tracing_open,

	.read		= seq_read,

	.read_iter	= seq_read_iter,

	.splice_read	= generic_file_splice_read,

	.splice_read	= copy_splice_read,

	.write		= tracing_write_stub,

	.llseek		= tracing_lseek,

	.release	= tracing_release,