Re: [PATCH] perf: enum overflow in uapi/linux/perf_event.h

[Peter Zijlstra]

On Fri, Sep 07, 2018 at 01:27:19PM +0000, Christophe Leroy wrote:
> On PPC32, enums are 32 bits, so __PERF_SAMPLE_CALLCHAIN_EARLY is
> out of scope. The following sparse warning is encountered:
> 
>   CHECK   arch/powerpc/kernel/process.c
> ./include/uapi/linux/perf_event.h:147:56: warning: cast truncates bits from constant value (8000000000000000 becomes 0)

Urgh... what compiler is that? I've not seen anything like that from the
build bots.