default enable sparse __CHECK_ENDIAN__ (was: Re: [PATCH v7 2/3] net: Add Keystone NetCP ethernet driver)

Marcel Holtmann marcel at
Thu Dec 11 03:18:44 PST 2014

Hi Joe,

>>> Are you referring to the static code analyser sparse that is invoked
>>> through?
>> You have to explicitly enable endian checking, it's not on by
>> default.
> There don't seem to be thousands of warnings anymore.
> Maybe it's time to default enable it when using C=?
> from: Documentation/sparse.txt:
> The optional make variable CF can be used to pass arguments to sparse.  The
> build system passes -Wbitwise to sparse automatically.  To perform endianness
> checks, you may define __CHECK_ENDIAN__:
>        make C=2 CF="-D__CHECK_ENDIAN__"
> These checks are disabled by default as they generate a host of warnings.

actually a few subsystems use this in their Makefile:

	subdir-ccflags-y += -D__CHECK_ENDIAN__

We could start with that to enable endian checks by default in various places.



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