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[bpf-next,v4,01/11] btf: make btf_set_contains take a const pointer

Message ID 20200921121227.255763-2-lmb@cloudflare.com
State New
Headers show
Series Make check_func_arg type checks table driven | expand

Commit Message

Lorenz Bauer Sept. 21, 2020, 12:12 p.m. UTC 
bsearch doesn't modify the contents of the array, so we can take a const pointer.

Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
---
 include/linux/bpf.h | 2 +-
 kernel/bpf/btf.c    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 5dcce0364634..4cbf92f5ecdb 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1901,6 +1901,6 @@  int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
 		       void *addr1, void *addr2);
 
 struct btf_id_set;
-bool btf_id_set_contains(struct btf_id_set *set, u32 id);
+bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
 
 #endif /* _LINUX_BPF_H */
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index f9ac6935ab3c..a2330f6fe2e6 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -4772,7 +4772,7 @@  static int btf_id_cmp_func(const void *a, const void *b)
 	return *pa - *pb;
 }
 
-bool btf_id_set_contains(struct btf_id_set *set, u32 id)
+bool btf_id_set_contains(const struct btf_id_set *set, u32 id)
 {
 	return bsearch(&id, set->ids, set->cnt, sizeof(u32), btf_id_cmp_func) != NULL;
 }