perf, bpf: fix conditional call to bpf_overflow_handler
authorArnd Bergmann <arnd@arndb.de>
Tue, 6 Sep 2016 13:10:22 +0000 (15:10 +0200)
committerDavid S. Miller <davem@davemloft.net>
Tue, 6 Sep 2016 23:34:14 +0000 (16:34 -0700)
commitf1e4ba5b6a6555d1f6b174d4fd0a96a9363bb57f
treece25127a5cf8b1ca5bda066c785fe1892a65152e
parent3f591997b1484cbf869d21b511c8d84902444cfb
perf, bpf: fix conditional call to bpf_overflow_handler

The newly added bpf_overflow_handler function is only built of both
CONFIG_EVENT_TRACING and CONFIG_BPF_SYSCALL are enabled, but the caller
only checks the latter:

kernel/events/core.c: In function 'perf_event_alloc':
kernel/events/core.c:9106:27: error: 'bpf_overflow_handler' undeclared (first use in this function)

This changes the caller so we also skip this call if CONFIG_EVENT_TRACING
is disabled entirely.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: aa6a5f3cb2b2 ("perf, bpf: add perf events core support for BPF_PROG_TYPE_PERF_EVENT programs")
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
kernel/events/core.c