From: Zong Li Date: Mon, 13 Aug 2018 02:26:52 +0000 (+0800) Subject: net: Change the layout of structure trace_event_raw_fib_table_lookup X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=0192e7d46c776f7f735560bfa4d40eac3fd700f9;p=openwrt%2Fstaging%2Fblogic.git net: Change the layout of structure trace_event_raw_fib_table_lookup There is an unalignment access about the structure 'trace_event_raw_fib_table_lookup'. In include/trace/events/fib.h, there is a memory operation which casting the 'src' data member to a pointer, and then store a value to this pointer point to. p32 = (__be32 *) __entry->src; *p32 = flp->saddr; The offset of 'src' in structure trace_event_raw_fib_table_lookup is not four bytes alignment. On some architectures, they don't permit the unalignment access, it need to pay the price to handle this situation in exception handler. Adjust the layout of structure to avoid this case. Fixes: 9f323973c915 ("net/ipv4: Udate fib_table_lookup tracepoint") Signed-off-by: Zong Li Acked-by: David Ahern Signed-off-by: David S. Miller --- diff --git a/include/trace/events/fib.h b/include/trace/events/fib.h index 9763cddd0594..6271bab63bfb 100644 --- a/include/trace/events/fib.h +++ b/include/trace/events/fib.h @@ -22,6 +22,7 @@ TRACE_EVENT(fib_table_lookup, __field( int, err ) __field( int, oif ) __field( int, iif ) + __field( u8, proto ) __field( __u8, tos ) __field( __u8, scope ) __field( __u8, flags ) @@ -31,7 +32,6 @@ TRACE_EVENT(fib_table_lookup, __array( __u8, saddr, 4 ) __field( u16, sport ) __field( u16, dport ) - __field( u8, proto ) __dynamic_array(char, name, IFNAMSIZ ) ),