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authorAlexei Starovoitov <ast@fb.com>2016-02-01 22:39:58 -0800
committerDavid S. Miller <davem@davemloft.net>2016-02-06 03:34:36 -0500
commit3059303f59cf90a84e7fdef154ff0b215bcfaa97 (patch)
treebacdf1b8025256fc591b1fd935a99f0b6af7466f /samples/bpf/tracex3_kern.c
parentsamples/bpf: unit test for BPF_MAP_TYPE_PERCPU_ARRAY (diff)
downloadwireguard-linux-3059303f59cf90a84e7fdef154ff0b215bcfaa97.tar.xz
wireguard-linux-3059303f59cf90a84e7fdef154ff0b215bcfaa97.zip
samples/bpf: update tracex[23] examples to use per-cpu maps
Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/tracex3_kern.c')
-rw-r--r--samples/bpf/tracex3_kern.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/samples/bpf/tracex3_kern.c b/samples/bpf/tracex3_kern.c
index bf337fbb0947..9974c3d7c18b 100644
--- a/samples/bpf/tracex3_kern.c
+++ b/samples/bpf/tracex3_kern.c
@@ -20,7 +20,7 @@ struct bpf_map_def SEC("maps") my_map = {
/* kprobe is NOT a stable ABI. If kernel internals change this bpf+kprobe
* example will no longer be meaningful
*/
-SEC("kprobe/blk_mq_start_request")
+SEC("kprobe/blk_start_request")
int bpf_prog1(struct pt_regs *ctx)
{
long rq = PT_REGS_PARM1(ctx);
@@ -42,13 +42,13 @@ static unsigned int log2l(unsigned long long n)
#define SLOTS 100
struct bpf_map_def SEC("maps") lat_map = {
- .type = BPF_MAP_TYPE_ARRAY,
+ .type = BPF_MAP_TYPE_PERCPU_ARRAY,
.key_size = sizeof(u32),
.value_size = sizeof(u64),
.max_entries = SLOTS,
};
-SEC("kprobe/blk_update_request")
+SEC("kprobe/blk_account_io_completion")
int bpf_prog2(struct pt_regs *ctx)
{
long rq = PT_REGS_PARM1(ctx);
@@ -81,7 +81,7 @@ int bpf_prog2(struct pt_regs *ctx)
value = bpf_map_lookup_elem(&lat_map, &index);
if (value)
- __sync_fetch_and_add((long *)value, 1);
+ *value += 1;
return 0;
}