summaryrefslogtreecommitdiff
path: root/kernel/trace/bpf_trace.c
diff options
context:
space:
mode:
authorTakashi Iwai <tiwai@suse.de>2023-08-28 16:13:03 +0200
committerTakashi Iwai <tiwai@suse.de>2023-08-28 16:13:03 +0200
commit692f5510159c79bfa312a4e27a15e266232bfb4c (patch)
treed58825a761ff8b525a9565f30f3bc47bc6b47147 /kernel/trace/bpf_trace.c
parentab574d1629552b6831cd91b926b38092c15d6142 (diff)
parent199cd64140f222c66b68ebe288a3fcd0570e2e41 (diff)
Merge tag 'asoc-v6.6' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Updates for v6.6 The rest of the updates for v6.6, some of the highlights include: - A big API cleanup from Morimoto-san, rationalising the places we put functions. - Lots of work on the SOF framework, AMD and Intel drivers, including a lot of cleanup and new device support. - Standardisation of the presentation of jacks from drivers. - Provision of some generic sound card DT properties. - Conversion oof more drivers to the maple tree register cache. - New drivers for AMD Van Gogh, AWInic AW88261, Cirrus Logic cs42l43, various Intel platforms, Mediatek MT7986, RealTek RT1017 and StarFive JH7110.
Diffstat (limited to 'kernel/trace/bpf_trace.c')
-rw-r--r--kernel/trace/bpf_trace.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 5f2dcabad202..bd1a42b23f3f 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -661,8 +661,7 @@ static DEFINE_PER_CPU(int, bpf_trace_nest_level);
BPF_CALL_5(bpf_perf_event_output, struct pt_regs *, regs, struct bpf_map *, map,
u64, flags, void *, data, u64, size)
{
- struct bpf_trace_sample_data *sds = this_cpu_ptr(&bpf_trace_sds);
- int nest_level = this_cpu_inc_return(bpf_trace_nest_level);
+ struct bpf_trace_sample_data *sds;
struct perf_raw_record raw = {
.frag = {
.size = size,
@@ -670,7 +669,11 @@ BPF_CALL_5(bpf_perf_event_output, struct pt_regs *, regs, struct bpf_map *, map,
},
};
struct perf_sample_data *sd;
- int err;
+ int nest_level, err;
+
+ preempt_disable();
+ sds = this_cpu_ptr(&bpf_trace_sds);
+ nest_level = this_cpu_inc_return(bpf_trace_nest_level);
if (WARN_ON_ONCE(nest_level > ARRAY_SIZE(sds->sds))) {
err = -EBUSY;
@@ -688,9 +691,9 @@ BPF_CALL_5(bpf_perf_event_output, struct pt_regs *, regs, struct bpf_map *, map,
perf_sample_save_raw_data(sd, &raw);
err = __bpf_perf_event_output(regs, map, flags, sd);
-
out:
this_cpu_dec(bpf_trace_nest_level);
+ preempt_enable();
return err;
}
@@ -715,7 +718,6 @@ static DEFINE_PER_CPU(struct bpf_trace_sample_data, bpf_misc_sds);
u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy)
{
- int nest_level = this_cpu_inc_return(bpf_event_output_nest_level);
struct perf_raw_frag frag = {
.copy = ctx_copy,
.size = ctx_size,
@@ -732,8 +734,12 @@ u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
};
struct perf_sample_data *sd;
struct pt_regs *regs;
+ int nest_level;
u64 ret;
+ preempt_disable();
+ nest_level = this_cpu_inc_return(bpf_event_output_nest_level);
+
if (WARN_ON_ONCE(nest_level > ARRAY_SIZE(bpf_misc_sds.sds))) {
ret = -EBUSY;
goto out;
@@ -748,6 +754,7 @@ u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
ret = __bpf_perf_event_output(regs, map, flags, sd);
out:
this_cpu_dec(bpf_event_output_nest_level);
+ preempt_enable();
return ret;
}