On 08/28/2018 03:29 PM, Li Yang wrote:

On Tue, Aug 28, 2018 at 5:16 PM Tyrel Datwyler
[off-list ref] wrote:

quoted

On 08/28/2018 11:48 AM, Li Yang wrote:

quoted

On Mon, Aug 27, 2018 at 8:57 PM Rob Herring [off-list ref] wrote:

quoted

In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.

Please forgive my ignorance, but what is this format specifier do
exactly?   I cannot find anything listed in the printf specification
matching this.  Is this something newly introduced?

Leo

From Documentation/core-api/printk-formats.rst:

I was trying to find it in the standard c format specifier.  :(
Thanks a lot for the pointer.

No problem. Its worth a look through. The usual integer types are at the top, but that is followed by the pointer types which the kernel provides quite a few for a variety of things.

quoted

kobjects
--------

::

        %pOF[fnpPcCF]


For printing kobject based structs (device nodes). Default behaviour is
equivalent to %pOFf.

        - f - device node full_name
        - n - device node name
        - p - device node phandle
        - P - device node path spec (name + @unit)
        - F - device node flags
        - c - major compatible string
        - C - full compatible string


-Tyrel