lkml.org 
[lkml]   [2014]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v8 1/8] ftrace: make CALLER_ADDRx macros more generic
From
On Wed, Apr 30, 2014 at 11:54 AM, AKASHI Takahiro
<takahiro.akashi@linaro.org> wrote:
> Most archs with HAVE_ARCH_CALLER_ADDR have the almost same definitions
> of CALLER_ADDRx(n), and so put them into linux/ftrace.h.
>
> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>

On arm (at least shmobile_defconfig and versatile_defconfig) with gcc 4.6.3:

kernel/sched/core.c: In function 'get_parent_ip':
kernel/sched/core.c:2520:10: warning: unsupported argument to
'__builtin_return_address' [enabled by default]
kernel/sched/core.c:2522:11: warning: unsupported argument to
'__builtin_return_address' [enabled by default]

With gcc 4.9.0:

kernel/sched/core.c: In function 'get_parent_ip':
include/linux/ftrace.h:627:36: warning: unsupported argument to
'__builtin_return_address'
# define ftrace_return_address(n) __builtin_return_address(n)
^
include/linux/ftrace.h:635:38: note: in expansion of macro
'ftrace_return_address'
#define CALLER_ADDR2 ((unsigned long)ftrace_return_address(2))
^
kernel/sched/core.c:2520:10: note: in expansion of macro 'CALLER_ADDR2'
addr = CALLER_ADDR2;
^
include/linux/ftrace.h:627:36: warning: unsupported argument to
'__builtin_return_address'
# define ftrace_return_address(n) __builtin_return_address(n)
^
include/linux/ftrace.h:636:38: note: in expansion of macro
'ftrace_return_address'
#define CALLER_ADDR3 ((unsigned long)ftrace_return_address(3))
^
kernel/sched/core.c:2522:11: note: in expansion of macro 'CALLER_ADDR3'
addr = CALLER_ADDR3;
^

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds


\
 
 \ /
  Last update: 2014-06-11 15:21    [W:0.209 / U:0.956 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site