Hello Stephen, This seems to be the same problem as pointed by ACME on the patch series [1]. Could this be a compiler false positive ? Because the new code block is exact same like the existing one. This warning seems to only occurs on powerpc64el platform, but not on others. [1] https://lore.kernel.org/lkml/Yw59CkHUVbfrHdkh@xxxxxxxxxx/ - Anshuman On 8/31/22 04:04, Stephen Rothwell wrote: > Hi all, > > After merging the perf tree, today's linux-next build (native perf) > failed like this: > > In file included from /usr/include/stdio.h:866, > from /home/sfr/next/next/tools/perf/util/branch.h:9, > from util/branch.c:2: > In function 'fprintf', > inlined from 'branch_type_stat_display' at util/branch.c:152:4: > /usr/include/powerpc64le-linux-gnu/bits/stdio2.h:105:10: error: '%8s' directive argument is null [-Werror=format-overflow=] > 105 | return __fprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > 106 | __va_arg_pack ()); > | ~~~~~~~~~~~~~~~~~ > cc1: all warnings being treated as errors > > Presumably caused by commit > > 9781e500dcb8 ("perf branch: Extend branch type classification") > > "native" here is PowerPC64 LE. > $ gcc --version > gcc (Debian 11.2.0-10) 11.2.0 > > I have used the perf tree from next-20220830 for today. >
