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bpf: change prototype for stack_map_get_build_id_offset

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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>
This commit is contained in:
Yonghong Song 2018-04-28 22:28:07 -07:00 committed by Alexei Starovoitov
parent 2c25fc9a50
commit 5f41263274
1 changed files with 5 additions and 8 deletions
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13
kernel/bpf/stackmap.c
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@ -262,16 +262,11 @@ out:
return ret; return ret;
} }
static void stack_map_get_build_id_offset(struct bpf_map *map, static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs,
struct stack_map_bucket *bucket,
u64 *ips, u32 trace_nr, bool user) u64 *ips, u32 trace_nr, bool user)
{ {
int i; int i;
struct vm_area_struct *vma; 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 * 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); pcpu_freelist_pop(&smap->freelist);
if (unlikely(!new_bucket)) if (unlikely(!new_bucket))
return -ENOMEM; return -ENOMEM;
stack_map_get_build_id_offset(map, new_bucket, ips, new_bucket->nr = trace_nr;
trace_nr, user); 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); trace_len = trace_nr * sizeof(struct bpf_stack_build_id);
if (hash_matches && bucket->nr == trace_nr && if (hash_matches && bucket->nr == trace_nr &&
memcmp(bucket->data, new_bucket->data, trace_len) == 0) { memcmp(bucket->data, new_bucket->data, trace_len) == 0) {