diff options
| -rw-r--r-- | kernel/bpf/stackmap.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c index b59ace0f0f09..b675a3f3d141 100644 --- a/kernel/bpf/stackmap.c +++ b/kernel/bpf/stackmap.c @@ -285,11 +285,10 @@ static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs, { int i; struct vm_area_struct *vma; - bool in_nmi_ctx = in_nmi(); bool irq_work_busy = false; - struct stack_map_irq_work *work; + struct stack_map_irq_work *work = NULL; - if (in_nmi_ctx) { + if (in_nmi()) { work = this_cpu_ptr(&up_read_work); if (work->irq_work.flags & IRQ_WORK_BUSY) /* cannot queue more up_read, fallback */ @@ -328,7 +327,7 @@ static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs, id_offs[i].status = BPF_STACK_BUILD_ID_VALID; } - if (!in_nmi_ctx) { + if (!work) { up_read(¤t->mm->mmap_sem); } else { work->sem = ¤t->mm->mmap_sem; |