Hi all, After merging the bpf-next tree, today's linux-next build (powerpc perf) failed like this: In file included from xsk.c:32: libbpf_util.h:49:3: error: #warning Architecture missing native barrier functions in libbpf_util.h. [-Werror=cpp] # warning Architecture missing native barrier functions in libbpf_util.h. ^~~~~~~ cc1: all warnings being treated as errors Caused by commit b7e3a28019c9 ("libbpf: remove dependency on barrier.h in xsk.h") I have applied the following patch for today ... please fix this. From: Stephen Rothwell Date: Thu, 18 Apr 2019 11:54:56 +1000 Subject: [PATCH] suppress warning in tools/lib/bpf/libbpf_util.h Signed-off-by: Stephen Rothwell --- tools/lib/bpf/libbpf_util.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/lib/bpf/libbpf_util.h b/tools/lib/bpf/libbpf_util.h index 172b707e007b..a54eb2cdbdd6 100644 --- a/tools/lib/bpf/libbpf_util.h +++ b/tools/lib/bpf/libbpf_util.h @@ -46,7 +46,7 @@ do { \ # define libbpf_smp_mb() asm volatile("dmb ish" : : : "memory") # define libbpf_smp_rwmb() libbpf_smp_mb() #else -# warning Architecture missing native barrier functions in libbpf_util.h. +//# warning Architecture missing native barrier functions in libbpf_util.h. # define libbpf_smp_rmb() __sync_synchronize() # define libbpf_smp_wmb() __sync_synchronize() # define libbpf_smp_mb() __sync_synchronize() -- 2.20.1 -- Cheers, Stephen Rothwell