trace_printk is meant as a debugging tool, and should not be compiled into production code without specific debug Kconfig options enabled or source code changes.
Patches 1 to 3 remove/disable trace_printk that should not be enabled by default.
Patch 4 adds a config option that can be used to detect such trace_printk at compile time (instead of printing a nasty warning at runtime).
Nicolas Boichat (4): usb: cdns3: gadget: Replace trace_printk by dev_dbg media: atomisp: Replace trace_printk by pr_info media: camss: vfe: Use trace_printk for debugging only kernel/trace: Add TRACING_ALLOW_PRINTK config option
drivers/gpu/drm/i915/Kconfig.debug | 4 ++-- .../media/platform/qcom/camss/camss-vfe-4-1.c | 2 ++ .../media/platform/qcom/camss/camss-vfe-4-7.c | 2 ++ drivers/staging/media/atomisp/pci/hmm/hmm.c | 10 +++++----- drivers/usb/cdns3/gadget.c | 2 +- fs/f2fs/Kconfig | 1 + include/linux/kernel.h | 17 ++++++++++++++++- kernel/trace/Kconfig | 10 ++++++++++ samples/Kconfig | 2 ++ 9 files changed, 41 insertions(+), 9 deletions(-)