* [PATCH 12/13] batman-adv: tracing: Use the new __vstring() helper
[not found] <20220705224453.120955146@goodmis.org>
@ 2022-07-05 22:45 ` Steven Rostedt
0 siblings, 0 replies; only message in thread
From: Steven Rostedt @ 2022-07-05 22:45 UTC (permalink / raw)
To: linux-kernel
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, netdev
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
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2022-07-05 22:45 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <20220705224453.120955146@goodmis.org>
2022-07-05 22:45 ` [PATCH 12/13] batman-adv: tracing: Use the new __vstring() helper Steven Rostedt
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).