On Thu, Sep 30, 2021 at 2:20 PM Marco Elver <elver@xxxxxxxxxx> wrote: > > On Thu, Sep 30, 2021 at 03:50AM +0000, yanjun.zhu@xxxxxxxxx wrote: > > > >> -EXPORT_SYMBOL(__kasan_kmalloc); > > >> > > >> Sorry, but this will break all users of kmalloc() with KASAN on if > > >> !TRACING: > > > > > > *module users. > > > > > > An allmodconfig but with CONFIG_TRACING=n will probably show you the problem. > > > > Follow your advice, I changed CONFIG_TRACING=n in .config. Then I run "make -jxx modules". > > But CONFIG_TRACING is changed to y. > > So what you mentioned does not appear. > > CONFIG_TRACING is not user selectable but auto-selected, just have to > disable all those that select it. See .config, which breaks. Symbol: TRACING [=y] x Type : bool x Defined at kernel/trace/Kconfig:114 x Selects: RING_BUFFER [=y] && STACKTRACE [=y] && TRACEPOINTS [=y] && NOP_TRACER [=y] && BINARY_PRINTF [=y] && EVENT_TRACING [=y] && TRACE_CLOCK [=y] x x Selected by [y]: x - PREEMPTIRQ_TRACEPOINTS [=y] && (TRACE_PREEMPT_TOGGLE [=n] || TRACE_IRQFLAGS [=y]) x - GENERIC_TRACER [=y] x - KPROBE_EVENTS [=y] && FTRACE [=y] && KPROBES [=y] && HAVE_REGS_AND_STACK_ACCESS_API [=y] x - UPROBE_EVENTS [=y] && FTRACE [=y] && ARCH_SUPPORTS_UPROBES [=y] && MMU [=y] && PERF_EVENTS [=y] x - SYNTH_EVENTS [=y] && FTRACE [=y] x - HIST_TRIGGERS [=y] && FTRACE [=y] && ARCH_HAVE_NMI_SAFE_CMPXCHG [=y] x Selected by [n]: x - DRM_I915_TRACE_GEM [=n] && HAS_IOMEM [=y] && DRM_I915 [=m] && EXPERT [=y] && DRM_I915_DEBUG_GEM [=n] x - DRM_I915_TRACE_GTT [=n] && HAS_IOMEM [=y] && DRM_I915 [=m] && EXPERT [=y] && DRM_I915_DEBUG_GEM [=n] x - ENABLE_DEFAULT_TRACERS [=n] && FTRACE [=y] && !GENERIC_TRACER [=y] >From .config, I got the above. It seems that CONFIG_TRACING is selected by a lot of things. Is there any method to set CONFIG_TRACING=n? Zhu Yanjun
