Re: [PATCH v2] mm: kmemleak: Use address-of operator on section symbols

[Nathan Chancellor]

On Thu, Feb 20, 2020 at 05:35:01PM -0800, Andrew Morton wrote:
> On Wed, 19 Feb 2020 22:15:51 -0700 Nathan Chancellor <natechancellor@xxxxxxxxx> wrote:
> 
> > Clang warns:
> > 
> > These are not true arrays, they are linker defined symbols, which are
> > just addresses. Using the address of operator silences the warning and
> > does not change the resulting assembly with either clang/ld.lld or
> > gcc/ld (tested with diff + objdump -Dr).
> 
> I guess you forgot to quote the clang output?

Ugh yes, sorry. I can send a v3 later  or here it is if you want to
stitch it in:

../mm/kmemleak.c:1955:28: warning: array comparison always evaluates to a constant [-Wtautological-compare]
        if (__start_ro_after_init < _sdata || __end_ro_after_init > _edata)
                                  ^
../mm/kmemleak.c:1955:60: warning: array comparison always evaluates to a constant [-Wtautological-compare]
        if (__start_ro_after_init < _sdata || __end_ro_after_init > _edata)
                                                                  ^
2 warnings generated.

Cheers,
Nathan