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| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2021-11-23 05:27:31 +0530 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-11-30 15:48:14 -0800 |
| commit | d4efb170861827290f7f571020001a60d001faaf (patch) | |
| tree | 6d7c172b35a5e6a707c5f6d7091e3fe851ab5e07 | |
| parent | b98057ef730ad91b35d96658d9d8a306b618b8e5 (diff) | |
| download | linux-stable-d4efb170861827290f7f571020001a60d001faaf.tar.gz linux-stable-d4efb170861827290f7f571020001a60d001faaf.tar.bz2 linux-stable-d4efb170861827290f7f571020001a60d001faaf.zip | |
bpf: Change bpf_kallsyms_lookup_name size type to ARG_CONST_SIZE_OR_ZERO
Andrii mentioned in [0] that switching to ARG_CONST_SIZE_OR_ZERO lets
user avoid having to prove that string size at runtime is not zero and
helps with not having to supress clang optimizations.
[0]: https://lore.kernel.org/bpf/CAEf4BzZa_vhXB3c8atNcTS6=krQvC25H7K7c3WWZhM=27ro=Wg@mail.gmail.com
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20211122235733.634914-2-memxor@gmail.com
| -rw-r--r-- | kernel/bpf/syscall.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 50f96ea4452a..47089d1d67a4 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -4804,7 +4804,7 @@ const struct bpf_func_proto bpf_kallsyms_lookup_name_proto = { .gpl_only = false, .ret_type = RET_INTEGER, .arg1_type = ARG_PTR_TO_MEM, - .arg2_type = ARG_CONST_SIZE, + .arg2_type = ARG_CONST_SIZE_OR_ZERO, .arg3_type = ARG_ANYTHING, .arg4_type = ARG_PTR_TO_LONG, }; |