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