bpf: fix u64_stats_init() usage in bpf_prog_alloc() (4b911304) · Commits · 戴 / test

We need to iterate through all possible cpus. Fixes: ("bpf: enable program stats") Signed-off-by:

kernel/bpf/core.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -109,6 +109,7 @@ struct bpf_prog *bpf_prog_alloc(unsigned int size, gfp_t gfp_extra_flags)
		{
		gfp_t gfp_flags = GFP_KERNEL \| __GFP_ZERO \| gfp_extra_flags;
		struct bpf_prog *prog;
		int cpu;

		prog = bpf_prog_alloc_no_stats(size, gfp_extra_flags);
		if (!prog)
		@@ -121,7 +122,12 @@ struct bpf_prog *bpf_prog_alloc(unsigned int size, gfp_t gfp_extra_flags)
		return NULL;
		}

		u64_stats_init(&prog->aux->stats->syncp);
		for_each_possible_cpu(cpu) {
		struct bpf_prog_stats *pstats;

		pstats = per_cpu_ptr(prog->aux->stats, cpu);
		u64_stats_init(&pstats->syncp);
		}
		return prog;
		}
		EXPORT_SYMBOL_GPL(bpf_prog_alloc);