From: Joel Fernandes (Google) joel@joelfernandes.org
commit bf44f488e168368cae4139b4b33c3d0aaa11679c upstream.
Discussion in the below link reported that symbols in modules can appear to be before _stext on ARM architecture, causing wrapping with the offsets of this tracepoint. Change the offset type to s32 to fix this.
Link: http://lore.kernel.org/r/20191127154428.191095-1-antonio.borneo@st.com Link: http://lkml.kernel.org/r/20200102194625.226436-1-joel@joelfernandes.org
Cc: Bjorn Helgaas bhelgaas@google.com Cc: David Sterba dsterba@suse.com Cc: Ingo Molnar mingo@redhat.com Cc: Mike Rapoport rppt@linux.ibm.com Cc: "Rafael J. Wysocki" rafael.j.wysocki@intel.com Cc: Sakari Ailus sakari.ailus@linux.intel.com Cc: Antonio Borneo antonio.borneo@st.com Cc: stable@vger.kernel.org Fixes: d59158162e032 ("tracing: Add support for preempt and irq enable/disable events") Signed-off-by: Joel Fernandes (Google) joel@joelfernandes.org Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- include/trace/events/preemptirq.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
--- a/include/trace/events/preemptirq.h +++ b/include/trace/events/preemptirq.h @@ -18,13 +18,13 @@ DECLARE_EVENT_CLASS(preemptirq_template, TP_ARGS(ip, parent_ip),
TP_STRUCT__entry( - __field(u32, caller_offs) - __field(u32, parent_offs) + __field(s32, caller_offs) + __field(s32, parent_offs) ),
TP_fast_assign( - __entry->caller_offs = (u32)(ip - (unsigned long)_stext); - __entry->parent_offs = (u32)(parent_ip - (unsigned long)_stext); + __entry->caller_offs = (s32)(ip - (unsigned long)_stext); + __entry->parent_offs = (s32)(parent_ip - (unsigned long)_stext); ),
TP_printk("caller=%pF parent=%pF",