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Subject[tip:perf/core] objtool: Initialize variable to silence old compiler
Commit-ID:  b49364f36cfdb6d540ac961102d7ffaf84279bb6
Gitweb: http://git.kernel.org/tip/b49364f36cfdb6d540ac961102d7ffaf84279bb6
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Fri, 15 Jul 2016 17:32:52 -0300
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 15 Jul 2016 17:32:52 -0300

objtool: Initialize variable to silence old compiler

gcc version 4.1.2 20080704 (Red Hat 4.1.2-55) barfs with:

CC /tmp/build/objtool/builtin-check.o
cc1: warnings being treated as errors
builtin-check.c: In function 'cmd_check':
builtin-check.c:667: warning: 'prev_rela' may be used uninitialized in this function
mv: cannot stat `/tmp/build/objtool/.builtin-check.o.tmp': No such file or directory
make[1]: *** [/tmp/build/objtool/builtin-check.o] Error 1

Init it to NULL to silence it.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-qolo31rl2ojlwj1lj9dhemyz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/objtool/builtin-check.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c
index 92d84b2..4ed30f4 100644
--- a/tools/objtool/builtin-check.c
+++ b/tools/objtool/builtin-check.c
@@ -664,7 +664,7 @@ static int add_func_switch_tables(struct objtool_file *file,
struct symbol *func)
{
struct instruction *insn, *prev_jump;
- struct rela *text_rela, *rodata_rela, *prev_rela;
+ struct rela *text_rela, *rodata_rela, *prev_rela = NULL;
int ret;

prev_jump = NULL;
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