Re: [PATCH v2 2/8] lib: vdso: Build 32 bit specific functions in the right context

From: Thomas Gleixner
Date: Tue Jan 14 2020 - 04:34:02 EST


Thomas Gleixner <tglx@xxxxxxxxxxxxx> writes:

> Vincenzo Frascino <vincenzo.frascino@xxxxxxx> writes:
>
>> clock_gettime32 and clock_getres_time32 should be compiled only with a
>> 32 bit vdso library.
>>
>> Exclude these symbols when BUILD_VDSO32 is not defined.
>
> This breaks the ARM build with:
>
> arch/arm/vdso/vgettimeofday.c: In function â__vdso_clock_gettimeâ:
> arch/arm/vdso/vgettimeofday.c:15:9: error: implicit declaration of function â__cvdso_clock_gettime32â; did you mean â__cvdso_clock_gettimeâ? [-Werror=implicit-function-declaration]
> return __cvdso_clock_gettime32(clock, ts);
> ^~~~~~~~~~~~~~~~~~~~~~~
> __cvdso_clock_gettime
> arch/arm/vdso/vgettimeofday.c: In function â__vdso_clock_getresâ:
> arch/arm/vdso/vgettimeofday.c:33:9: error: implicit declaration of function â__cvdso_clock_getres_time32â; did you mean â__cvdso_clock_getres_commonâ? [-Werror=implicit-function-declaration]
> return __cvdso_clock_getres_time32(clock_id, res);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~
> __cvdso_clock_getres_common
> cc1: some warnings being treated as errors
>
> The patch below 'fixes' at least the build. Can someone please confirm
> the correctness?

Bah, it's not fixing it. That's what you get when you compile the wrong
tree...