Messages in this thread Patch in this message | | | Date | Tue, 05 Jul 2022 18:45:05 -0400 | From | Steven Rostedt <> | Subject | [PATCH 12/13] batman-adv: tracing: Use the new __vstring() helper |
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From: "Steven Rostedt (Google)" <rostedt@goodmis.org>
Instead of open coding a __dynamic_array() with a fixed length (which defeats the purpose of the dynamic array in the first place). Use the new __vstring() helper that will use a va_list and only write enough of the string into the ring buffer that is needed.
Cc: Marek Lindner <mareklindner@neomailbox.ch> Cc: Simon Wunderlich <sw@simonwunderlich.de> Cc: Antonio Quartulli <a@unstable.cc> Cc: Sven Eckelmann <sven@narfation.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: b.a.t.m.a.n@lists.open-mesh.org Cc: netdev@vger.kernel.org Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> --- net/batman-adv/trace.h | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/net/batman-adv/trace.h b/net/batman-adv/trace.h index d673ebdd0426..67d2a8a0196c 100644 --- a/net/batman-adv/trace.h +++ b/net/batman-adv/trace.h @@ -40,16 +40,13 @@ TRACE_EVENT(batadv_dbg, TP_STRUCT__entry( __string(device, bat_priv->soft_iface->name) __string(driver, KBUILD_MODNAME) - __dynamic_array(char, msg, BATADV_MAX_MSG_LEN) + __vstring(msg, vaf->fmt, vaf->va) ), TP_fast_assign( __assign_str(device, bat_priv->soft_iface->name); __assign_str(driver, KBUILD_MODNAME); - WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg), - BATADV_MAX_MSG_LEN, - vaf->fmt, - *vaf->va) >= BATADV_MAX_MSG_LEN); + __assign_vstr(msg, vaf->fmt, vaf->va); ), TP_printk( -- 2.35.1
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