tree 22b8b95d31148ccc8ec0df21d61641b9d2bcc49a
parent 1a8bdd35174eac95164c33aebb34e40df8ec6d44
author Yun Zhou <yun.zhou@windriver.com> 1624677716 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1626790858 +0200

seq_buf: Make trace_seq_putmem_hex() support data longer than 8

commit 6a2cbc58d6c9d90cd74288cc497c2b45815bc064 upstream.

Since the raw memory 'data' does not go forward, it will dump repeated
data if the data length is more than 8. If we want to dump longer data
blocks, we need to repeatedly call macro SEQ_PUT_HEX_FIELD. I think it
is a bit redundant, and multiple function calls also affect the performance.

Link: https://lore.kernel.org/lkml/20210625122453.5e2fe304@oasis.local.home/
Link: https://lkml.kernel.org/r/20210626032156.47889-2-yun.zhou@windriver.com

Cc: stable@vger.kernel.org
Fixes: 6d2289f3faa7 ("tracing: Make trace_seq_putmem_hex() more robust")
Signed-off-by: Yun Zhou <yun.zhou@windriver.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>