diff options
Diffstat (limited to 'features/perf/libbpf-Fix-build-warning-on-ref_ctr_off.patch')
| -rw-r--r-- | features/perf/libbpf-Fix-build-warning-on-ref_ctr_off.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/features/perf/libbpf-Fix-build-warning-on-ref_ctr_off.patch b/features/perf/libbpf-Fix-build-warning-on-ref_ctr_off.patch new file mode 100644 index 00000000..10ed1460 --- /dev/null +++ b/features/perf/libbpf-Fix-build-warning-on-ref_ctr_off.patch @@ -0,0 +1,46 @@ +From a41f5bda3e72b4f2bcdbe84cd65190121e3cc3ff Mon Sep 17 00:00:00 2001 +From: Khem Raj <raj.khem@gmail.com> +Date: Sun, 4 Dec 2022 18:23:47 -0800 +Subject: [PATCH] libbpf: Fix build warning on ref_ctr_off + +Clang warns on 32-bit ARM on this comparision + +libbpf.c:10497:18: error: result of comparison of constant 4294967296 with expression of type 'size_t' (aka 'unsigned int') is always false [-Werror,-Wtautological-constant-out-of-range-compare] + if (ref_ctr_off >= (1ULL << PERF_UPROBE_REF_CTR_OFFSET_BITS)) + ~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Check for platform long int to be larger than 32-bits before enabling +this check, it false on 32bit anyways. + +Cc: Alexei Starovoitov <ast@kernel.org> +Cc: Daniel Borkmann <daniel@iogearbox.net> +Cc: Song Liu <song@kernel.org> +Cc: Yonghong Song <yhs@fb.com> +Cc: Jiri Olsa <jolsa@kernel.org> +Cc: Paul Walmsley <paul.walmsley@sifive.com> +Cc: Palmer Dabbelt <palmer@dabbelt.com> +Cc: Nathan Chancellor <nathan@kernel.org> +Cc: Nick Desaulniers <ndesaulniers@google.com> + +Signed-off-by: Khem Raj <raj.khem@gmail.com> +Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> +--- + tools/lib/bpf/libbpf.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c +index 05c4db355f28..23991e0d21a9 100644 +--- a/tools/lib/bpf/libbpf.c ++++ b/tools/lib/bpf/libbpf.c +@@ -9867,7 +9867,7 @@ static int perf_event_open_probe(bool uprobe, bool retprobe, const char *name, + char errmsg[STRERR_BUFSIZE]; + int type, pfd; + +- if ((__u64)ref_ctr_off >= (1ULL << PERF_UPROBE_REF_CTR_OFFSET_BITS)) ++ if (BITS_PER_LONG > 32 && (__u64)ref_ctr_off >= (1ULL << PERF_UPROBE_REF_CTR_OFFSET_BITS)) + return -EINVAL; + + memset(&attr, 0, attr_sz); +-- +2.34.1 + |