perf symbols: Remove incorrect open-coded container_of()
authorRabin Vincent <rabin@rab.in>
Tue, 23 Nov 2010 16:38:18 +0000 (22:08 +0530)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Tue, 23 Nov 2010 18:30:32 +0000 (16:30 -0200)
At least on ARM, padding is inserted between rb_node and sym in struct
symbol_name_rb_node, causing "((void *)sym) - sizeof(struct rb_node)" to
point inside rb_node rather than to the symbol_name_rb_node.  Fix this
by converting the code to use container_of().

Cc: Ian Munsie <imunsie@au1.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ming Lei <tom.leiming@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <20101123163106.GA25677@debian>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/symbol.c

index b39f499..0500895 100644 (file)
@@ -295,7 +295,9 @@ static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym)
 {
        struct rb_node **p = &self->rb_node;
        struct rb_node *parent = NULL;
-       struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s;
+       struct symbol_name_rb_node *symn, *s;
+
+       symn = container_of(sym, struct symbol_name_rb_node, sym);
 
        while (*p != NULL) {
                parent = *p;