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authorYonghong Song <yhs@fb.com>2018-04-28 22:28:07 -0700
committerAlexei Starovoitov <ast@kernel.org>2018-04-29 08:45:53 -0700
commit5f4126327494c189767ca64b222abadb07c55e3d (patch)
treeda49fcd3d06c7cd69253d8f7c02da61958457b1f /kernel/bpf/stackmap.c
parent2c25fc9a503adef4279951382fc9d47b59977f59 (diff)
bpf: change prototype for stack_map_get_build_id_offset
This patch didn't incur functionality change. The function prototype got changed so that the same function can be reused later. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/stackmap.c')
-rw-r--r--kernel/bpf/stackmap.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c
index 57eeb1234b67..04f6ec1679f0 100644
--- a/kernel/bpf/stackmap.c
+++ b/kernel/bpf/stackmap.c
@@ -262,16 +262,11 @@ out:
return ret;
}
-static void stack_map_get_build_id_offset(struct bpf_map *map,
- struct stack_map_bucket *bucket,
+static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs,
u64 *ips, u32 trace_nr, bool user)
{
int i;
struct vm_area_struct *vma;
- struct bpf_stack_build_id *id_offs;
-
- bucket->nr = trace_nr;
- id_offs = (struct bpf_stack_build_id *)bucket->data;
/*
* We cannot do up_read() in nmi context, so build_id lookup is
@@ -361,8 +356,10 @@ BPF_CALL_3(bpf_get_stackid, struct pt_regs *, regs, struct bpf_map *, map,
pcpu_freelist_pop(&smap->freelist);
if (unlikely(!new_bucket))
return -ENOMEM;
- stack_map_get_build_id_offset(map, new_bucket, ips,
- trace_nr, user);
+ new_bucket->nr = trace_nr;
+ stack_map_get_build_id_offset(
+ (struct bpf_stack_build_id *)new_bucket->data,
+ ips, trace_nr, user);
trace_len = trace_nr * sizeof(struct bpf_stack_build_id);
if (hash_matches && bucket->nr == trace_nr &&
memcmp(bucket->data, new_bucket->data, trace_len) == 0) {