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

[Christophe Leroy]

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 at pc16082vm linux-powerpc]# sparse --version
0.5.2

[root at pc16082vm linux-powerpc]# ppc-linux-gcc --version
ppc-linux-gcc (GCC) 5.4.0