From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Sun, 24 Jul 2022 19:16:50 -0400 From: Steven Rostedt Subject: [PATCH v2] batman-adv: tracing: Use the new __vstring() helper Message-ID: <20220724191650.236b1355@rorschach.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: LKML Cc: Ingo Molnar , Andrew Morton , Marek Lindner , Simon Wunderlich , Antonio Quartulli , Sven Eckelmann , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , b.a.t.m.a.n@lists.open-mesh.org, netdev@vger.kernel.org From: "Steven Rostedt (Google)" 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 Cc: Ingo Molnar Cc: Andrew Morton Cc: Simon Wunderlich Cc: Antonio Quartulli Cc: Sven Eckelmann Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: b.a.t.m.a.n@lists.open-mesh.org Cc: netdev@vger.kernel.org Signed-off-by: Steven Rostedt (Google) --- Changes since v1: https://lkml.kernel.org/r/20220705224751.080390002@goodmis.org - Removed no longer used BATADV_MAX_MSG_LEN net/batman-adv/trace.h | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/net/batman-adv/trace.h b/net/batman-adv/trace.h index d673ebdd0426..31c8f922651d 100644 --- a/net/batman-adv/trace.h +++ b/net/batman-adv/trace.h @@ -28,8 +28,6 @@ #endif /* CONFIG_BATMAN_ADV_TRACING */ -#define BATADV_MAX_MSG_LEN 256 - TRACE_EVENT(batadv_dbg, TP_PROTO(struct batadv_priv *bat_priv, @@ -40,16 +38,13 @@ 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