linux-kernel - Re: [PATCH v4 RESEND] x86/asm/entry/32, selftests: Add 'test_syscall

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Date:	Tue, 15 Sep 2015 08:05:12 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Denys Vlasenko <dvlasenk@...hat.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andy Lutomirski <luto@...capital.net>,
	Oleg Nesterov <oleg@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Alexei Starovoitov <ast@...mgrid.com>,
	Will Drewry <wad@...omium.org>,
	Kees Cook <keescook@...omium.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 RESEND] x86/asm/entry/32, selftests: Add
 'test_syscall_vdso' test


* Denys Vlasenko <dvlasenk@...hat.com> wrote:

>  tools/testing/selftests/x86/Makefile            |   2 +-
>  tools/testing/selftests/x86/test_syscall_vdso.c | 401 ++++++++++++++++++++++++
>  tools/testing/selftests/x86/thunks_32.S         |  55 ++++
>  3 files changed, 457 insertions(+), 1 deletion(-)
>  create mode 100644 tools/testing/selftests/x86/test_syscall_vdso.c
>  create mode 100644 tools/testing/selftests/x86/thunks_32.S

So I wanted to apply this testcase (testcases are great!), but there's a build 
warning:

test_syscall_vdso.c: In function ‘print_flags’:
test_syscall_vdso.c:239:4: warning: format not a string literal and no format arguments [-Wformat-security]
    printf(bitstr[(r >> bit) & 1]);
    ^

That's with GCC 4.9.2.

Thanks,

	Ingo
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