diff options
| author | Song Liu <songliubraving@fb.com> | 2020-07-03 05:45:37 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-07-03 06:21:56 +0300 |
| commit | 046cc3dd9a2507b8e111714807ab8bf15ea5bb70 (patch) | |
| tree | fdb000010085a84b92a72deb6919b9b2e1021773 /kernel/bpf/stackmap.c | |
| parent | 811d7e375d08312dba23f3b6bf7e58ec14aa5dcb (diff) | |
| download | linux-046cc3dd9a2507b8e111714807ab8bf15ea5bb70.tar.xz | |
bpf: Fix build without CONFIG_STACKTRACE
Without CONFIG_STACKTRACE stack_trace_save_tsk() is not defined. Let
get_callchain_entry_for_task() to always return NULL in such cases.
Fixes: fa28dcb82a38 ("bpf: Introduce helper bpf_get_task_stack()")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200703024537.79971-1-songliubraving@fb.com
Diffstat (limited to 'kernel/bpf/stackmap.c')
| -rw-r--r-- | kernel/bpf/stackmap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c index 5ad72ab2276b..a6c361ed7937 100644 --- a/kernel/bpf/stackmap.c +++ b/kernel/bpf/stackmap.c @@ -351,6 +351,7 @@ static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs, static struct perf_callchain_entry * get_callchain_entry_for_task(struct task_struct *task, u32 init_nr) { +#ifdef CONFIG_STACKTRACE struct perf_callchain_entry *entry; int rctx; @@ -380,6 +381,9 @@ get_callchain_entry_for_task(struct task_struct *task, u32 init_nr) put_callchain_entry(rctx); return entry; +#else /* CONFIG_STACKTRACE */ + return NULL; +#endif } BPF_CALL_3(bpf_get_stackid, struct pt_regs *, regs, struct bpf_map *, map, |