diff options
Diffstat (limited to 'include/linux/btf.h')
-rw-r--r-- | include/linux/btf.h | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/include/linux/btf.h b/include/linux/btf.h index 5f628f323442..49e0fe6d8274 100644 --- a/include/linux/btf.h +++ b/include/linux/btf.h @@ -73,6 +73,14 @@ #define KF_RCU (1 << 7) /* kfunc only takes rcu pointer arguments */ /* + * Tag marking a kernel function as a kfunc. This is meant to minimize the + * amount of copy-paste that kfunc authors have to include for correctness so + * as to avoid issues such as the compiler inlining or eliding either a static + * kfunc, or a global kfunc in an LTO build. + */ +#define __bpf_kfunc __used noinline + +/* * Return the name of the passed struct, if exists, or halt the build if for * example the structure gets renamed. In this way, developers have to revisit * the code using that structure name, and update it accordingly. @@ -236,6 +244,16 @@ static inline bool btf_type_is_small_int(const struct btf_type *t) return btf_type_is_int(t) && t->size <= sizeof(u64); } +static inline u8 btf_int_encoding(const struct btf_type *t) +{ + return BTF_INT_ENCODING(*(u32 *)(t + 1)); +} + +static inline bool btf_type_is_signed_int(const struct btf_type *t) +{ + return btf_type_is_int(t) && (btf_int_encoding(t) & BTF_INT_SIGNED); +} + static inline bool btf_type_is_enum(const struct btf_type *t) { return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM; @@ -306,11 +324,6 @@ static inline u8 btf_int_offset(const struct btf_type *t) return BTF_INT_OFFSET(*(u32 *)(t + 1)); } -static inline u8 btf_int_encoding(const struct btf_type *t) -{ - return BTF_INT_ENCODING(*(u32 *)(t + 1)); -} - static inline bool btf_type_is_scalar(const struct btf_type *t) { return btf_type_is_int(t) || btf_type_is_enum(t); |