On Fri, Sep 07, 2018 at 01:50:18PM +0000, Christophe Leroy wrote: > > > On 09/07/2018 01:42 PM, Peter Zijlstra wrote: > > 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. > > > > [root@pc16082vm linux-powerpc]# sparse --version > 0.5.2 > > [root@pc16082vm linux-powerpc]# ppc-linux-gcc --version > ppc-linux-gcc (GCC) 5.4.0
Ah, that's a sparse warning. But does your GCC agree? The thing is, sparse uses the C enum spec, but I suspect GCC uses the C++ enum spec and it all works fine.
