[PATCH] tracing: kmem: convert call_site addresses to user friendly symbols

[George G. Davis]

While attempting to debug slub freelist pointer corruption bugs
caused by a module, I discovered that the kmem call_site addresses are
not at all user friendly for modules unless you manage to save a copy
of kallsyms for the running kernel beforehand.

So convert kmem call_site addresses to user friendly symbols which is
especially helpful for module callers when you don't have a copy of
kallsyms for the running kernel.

Signed-off-by: George G. Davis <george_da...@mentor.com>
---
 include/trace/events/kmem.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index eb57e3037deb..ae18e61fa1c0 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace/events/kmem.h
@@ -35,7 +35,7 @@ DECLARE_EVENT_CLASS(kmem_alloc,
                __entry->gfp_flags      = gfp_flags;
        ),
 
-       TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu 
gfp_flags=%s",
+       TP_printk("call_site=%pS ptr=%p bytes_req=%zu bytes_alloc=%zu 
gfp_flags=%s",
                __entry->call_site,
                __entry->ptr,
                __entry->bytes_req,
@@ -88,7 +88,7 @@ DECLARE_EVENT_CLASS(kmem_alloc_node,
                __entry->node           = node;
        ),
 
-       TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu 
gfp_flags=%s node=%d",
+       TP_printk("call_site=%pS ptr=%p bytes_req=%zu bytes_alloc=%zu 
gfp_flags=%s node=%d",
                __entry->call_site,
                __entry->ptr,
                __entry->bytes_req,
@@ -131,7 +131,7 @@ DECLARE_EVENT_CLASS(kmem_free,
                __entry->ptr            = ptr;
        ),
 
-       TP_printk("call_site=%lx ptr=%p", __entry->call_site, __entry->ptr)
+       TP_printk("call_site=%pS ptr=%p", __entry->call_site, __entry->ptr)
 );
 
 DEFINE_EVENT(kmem_free, kfree,
-- 
2.7.4