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authorLorenz Bauer <lmb@cloudflare.com>2020-09-21 15:12:19 +0300
committerAlexei Starovoitov <ast@kernel.org>2020-09-22 01:00:40 +0300
commit27774b7073b5d520c80f1fcb8e9993fc139f21bd (patch)
treebe5f8f63d682dc423cd87746863a814127400463 /include/linux/btf_ids.h
parent0d004c020b5574e51f7a525e57d2a11958b334b5 (diff)
downloadlinux-27774b7073b5d520c80f1fcb8e9993fc139f21bd.tar.xz
btf: Add BTF_ID_LIST_SINGLE macro
Add a convenience macro that allows defining a BTF ID list with a single item. This lets us cut down on repetitive macros. Suggested-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-4-lmb@cloudflare.com
Diffstat (limited to 'include/linux/btf_ids.h')
-rw-r--r--include/linux/btf_ids.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/btf_ids.h b/include/linux/btf_ids.h
index 210b086188a3..57890b357f85 100644
--- a/include/linux/btf_ids.h
+++ b/include/linux/btf_ids.h
@@ -76,6 +76,13 @@ extern u32 name[];
#define BTF_ID_LIST_GLOBAL(name) \
__BTF_ID_LIST(name, globl)
+/* The BTF_ID_LIST_SINGLE macro defines a BTF_ID_LIST with
+ * a single entry.
+ */
+#define BTF_ID_LIST_SINGLE(name, prefix, typename) \
+ BTF_ID_LIST(name) \
+ BTF_ID(prefix, typename)
+
/*
* The BTF_ID_UNUSED macro defines 4 zero bytes.
* It's used when we want to define 'unused' entry
@@ -140,6 +147,7 @@ extern struct btf_id_set name;
#define BTF_ID(prefix, name)
#define BTF_ID_UNUSED
#define BTF_ID_LIST_GLOBAL(name) u32 name[1];
+#define BTF_ID_LIST_SINGLE(name, prefix, typename) static u32 name[1];
#define BTF_SET_START(name) static struct btf_id_set name = { 0 };
#define BTF_SET_START_GLOBAL(name) static struct btf_id_set name = { 0 };
#define BTF_SET_END(name)