iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf, bpf: fix conditional call to bpf_overflow_handler

Browse Source 
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: aa6a5f3cb2 ("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>
This commit is contained in:
Arnd Bergmann 2016-09-06 15:10:22 +02:00 committed by David S. Miller
parent 3f591997b1
commit f1e4ba5b6a
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/events/core.c
View File

@ -9072,7 +9072,7 @@ perf_event_alloc(struct perf_event_attr *attr, int cpu,
if (!overflow_handler && parent_event) { if (!overflow_handler && parent_event) {
overflow_handler = parent_event->overflow_handler; overflow_handler = parent_event->overflow_handler;
context = parent_event->overflow_handler_context; context = parent_event->overflow_handler_context;
#ifdef CONFIG_BPF_SYSCALL #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_EVENT_TRACING)
if (overflow_handler == bpf_overflow_handler) { if (overflow_handler == bpf_overflow_handler) {
struct bpf_prog *prog = bpf_prog_inc(parent_event->prog); struct bpf_prog *prog = bpf_prog_inc(parent_event->prog);