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

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.