On Fri, 3 Nov 2017 11:39:57 +0100
Arnd Bergmann <a...@arndb.de> wrote:
> When CONFIG_TRACING is disabled, the new preemptirq events tracer
> produces a build failure:
>
> In file included from kernel/trace/trace_irqsoff.c:17:0:
> kernel/trace/trace.h: In function 'trace_test_and_set_recursion':
> kernel/trace/trace.h:542:28: error: 'struct task_struct' has no member named
> 'trace_recursion'
>
> Adding an explicit dependency avoids the broken configuration.
>
> Fixes: d59158162e03 ("tracing: Add support for preempt and irq enable/disable
> events")
> Signed-off-by: Arnd Bergmann <a...@arndb.de>
> ---
> No idea if this is the best solution, it just happened to fix the build
> failure for me.
OK, as same as other tracers, it should select GENERIC_TRACER and
TRACER_MAX_TRACE,
and depends on TRACE_IRQFLAGS_SUPPORT, and maybe depends on
!ARCH_USES_GETTIMEOFFSET.
Thank you,
> ---
> kernel/trace/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
> index 1ff10ca078d6..c8c18c793c86 100644
> --- a/kernel/trace/Kconfig
> +++ b/kernel/trace/Kconfig
> @@ -164,6 +164,7 @@ config PREEMPTIRQ_EVENTS
> bool "Enable trace events for preempt and irq disable/enable"
> select TRACE_IRQFLAGS
> depends on DEBUG_PREEMPT || !PROVE_LOCKING
> + depends on TRACING
> default n
> help
> Enable tracing of disable and enable events for preemption and irqs.
> --
> 2.9.0
>
--
Masami Hiramatsu <mhira...@kernel.org>
