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-rw-r--r--lib/dynamic_debug.c80
1 files changed, 41 insertions, 39 deletions
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 198d2afe18ed..edec78052333 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -422,52 +422,60 @@ static int ddebug_exec_query(char *query_string)
return 0;
}
-static int dynamic_emit_prefix(const struct _ddebug *descriptor)
+#define PREFIX_SIZE 64
+
+static int remaining(int wrote)
+{
+ if (PREFIX_SIZE - wrote > 0)
+ return PREFIX_SIZE - wrote;
+ return 0;
+}
+
+static char *dynamic_emit_prefix(const struct _ddebug *desc, char *buf)
{
- char tid[sizeof(int) + sizeof(int)/2 + 4];
- char lineno[sizeof(int) + sizeof(int)/2];
+ int pos_after_tid;
+ int pos = 0;
- if (descriptor->flags & _DPRINTK_FLAGS_INCL_TID) {
+ pos += snprintf(buf + pos, remaining(pos), "%s", KERN_DEBUG);
+ if (desc->flags & _DPRINTK_FLAGS_INCL_TID) {
if (in_interrupt())
- snprintf(tid, sizeof(tid), "%s", "<intr> ");
+ pos += snprintf(buf + pos, remaining(pos), "%s ",
+ "<intr>");
else
- snprintf(tid, sizeof(tid), "[%d] ",
- task_pid_vnr(current));
- } else {
- tid[0] = 0;
+ pos += snprintf(buf + pos, remaining(pos), "[%d] ",
+ task_pid_vnr(current));
}
+ pos_after_tid = pos;
+ if (desc->flags & _DPRINTK_FLAGS_INCL_MODNAME)
+ pos += snprintf(buf + pos, remaining(pos), "%s:",
+ desc->modname);
+ if (desc->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
+ pos += snprintf(buf + pos, remaining(pos), "%s:",
+ desc->function);
+ if (desc->flags & _DPRINTK_FLAGS_INCL_LINENO)
+ pos += snprintf(buf + pos, remaining(pos), "%d:", desc->lineno);
+ if (pos - pos_after_tid)
+ pos += snprintf(buf + pos, remaining(pos), " ");
+ if (pos >= PREFIX_SIZE)
+ buf[PREFIX_SIZE - 1] = '\0';
- if (descriptor->flags & _DPRINTK_FLAGS_INCL_LINENO)
- snprintf(lineno, sizeof(lineno), "%d", descriptor->lineno);
- else
- lineno[0] = 0;
-
- return printk(KERN_DEBUG "%s%s%s%s%s%s",
- tid,
- (descriptor->flags & _DPRINTK_FLAGS_INCL_MODNAME) ?
- descriptor->modname : "",
- (descriptor->flags & _DPRINTK_FLAGS_INCL_MODNAME) ?
- ":" : "",
- (descriptor->flags & _DPRINTK_FLAGS_INCL_FUNCNAME) ?
- descriptor->function : "",
- (descriptor->flags & _DPRINTK_FLAGS_INCL_FUNCNAME) ?
- ":" : "",
- lineno);
+ return buf;
}
int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
{
va_list args;
int res;
+ struct va_format vaf;
+ char buf[PREFIX_SIZE];
BUG_ON(!descriptor);
BUG_ON(!fmt);
va_start(args, fmt);
-
- res = dynamic_emit_prefix(descriptor);
- res += vprintk(fmt, args);
-
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ res = printk("%s%pV", dynamic_emit_prefix(descriptor, buf), &vaf);
va_end(args);
return res;
@@ -480,18 +488,15 @@ int __dynamic_dev_dbg(struct _ddebug *descriptor,
struct va_format vaf;
va_list args;
int res;
+ char buf[PREFIX_SIZE];
BUG_ON(!descriptor);
BUG_ON(!fmt);
va_start(args, fmt);
-
vaf.fmt = fmt;
vaf.va = &args;
-
- res = dynamic_emit_prefix(descriptor);
- res += __dev_printk(KERN_CONT, dev, &vaf);
-
+ res = __dev_printk(dynamic_emit_prefix(descriptor, buf), dev, &vaf);
va_end(args);
return res;
@@ -504,18 +509,15 @@ int __dynamic_netdev_dbg(struct _ddebug *descriptor,
struct va_format vaf;
va_list args;
int res;
+ char buf[PREFIX_SIZE];
BUG_ON(!descriptor);
BUG_ON(!fmt);
va_start(args, fmt);
-
vaf.fmt = fmt;
vaf.va = &args;
-
- res = dynamic_emit_prefix(descriptor);
- res += __netdev_printk(KERN_CONT, dev, &vaf);
-
+ res = __netdev_printk(dynamic_emit_prefix(descriptor, buf), dev, &vaf);
va_end(args);
return res;