netdev_printk/dynamic_netdev_dbg: Directly call printk_emit
A lot of stack is used in recursive printks with %pV.
Using multiple levels of %pV (a logging function with %pV
that calls another logging function with %pV) can consume
more stack than necessary.
Avoid excessive stack use by not calling dev_printk from
netdev_printk and dynamic_netdev_dbg. Duplicate the logic
and form of dev_printk instead.
Make __netdev_printk static.
Remove EXPORT_SYMBOL(__netdev_printk)
Whitespace and brace style neatening.
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: David S. Miller <davem@davemloft.net>
Tested-by: Jim Cromie <jim.cromie@gmail.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 29ff2e4..2a29f4e 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -611,20 +611,40 @@
#ifdef CONFIG_NET
int __dynamic_netdev_dbg(struct _ddebug *descriptor,
- const struct net_device *dev, const char *fmt, ...)
+ const struct net_device *dev, const char *fmt, ...)
{
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 = __netdev_printk(dynamic_emit_prefix(descriptor, buf), dev, &vaf);
+
+ if (dev && dev->dev.parent) {
+ char buf[PREFIX_SIZE];
+ char dict[128];
+ size_t dictlen;
+
+ dictlen = create_syslog_header(dev->dev.parent,
+ dict, sizeof(dict));
+
+ res = printk_emit(0, 7, dictlen ? dict : NULL, dictlen,
+ "%s%s %s: %s: %pV",
+ dynamic_emit_prefix(descriptor, buf),
+ dev_driver_string(dev->dev.parent),
+ dev_name(dev->dev.parent),
+ netdev_name(dev), &vaf);
+ } else if (dev) {
+ res = printk(KERN_DEBUG "%s: %pV", netdev_name(dev), &vaf);
+ } else {
+ res = printk(KERN_DEBUG "(NULL net_device): %pV", &vaf);
+ }
+
va_end(args);
return res;