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Date: Tue, 11 May 2021 12:50:38 -0600
From: Jim Cromie <jim.cromie@...il.com>
To: Jason Baron <jbaron@...mai.com>, linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org, Jim Cromie <jim.cromie@...il.com>
Subject: [RFC PATCH v5 09/28] dyndbg: accept null site in dynamic_emit_prefix
2 prints use site->member, protect them with if site.
no functional changes.
Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
lib/dynamic_debug.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index fa89d69dad4e..fb8547feb061 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -629,15 +629,19 @@ static char *__dynamic_emit_prefix(const struct _ddebug *dp, char *buf)
task_pid_vnr(current));
}
pos_after_tid = pos;
- if (dp->flags & _DPRINTK_FLAGS_INCL_MODNAME)
- pos += snprintf(buf + pos, remaining(pos), "%s:",
- desc->modname);
- if (dp->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
- pos += snprintf(buf + pos, remaining(pos), "%s:",
- desc->function);
+
+ if (desc) {
+ if (dp->flags & _DPRINTK_FLAGS_INCL_MODNAME)
+ pos += snprintf(buf + pos, remaining(pos), "%s:",
+ desc->modname);
+ if (dp->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
+ pos += snprintf(buf + pos, remaining(pos), "%s:",
+ desc->function);
+ }
if (dp->flags & _DPRINTK_FLAGS_INCL_LINENO)
pos += snprintf(buf + pos, remaining(pos), "%d:",
dp->lineno);
+
if (pos - pos_after_tid)
pos += snprintf(buf + pos, remaining(pos), " ");
if (pos >= PREFIX_SIZE)
--
2.31.1
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