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| author |  Khem Raj <raj.khem@gmail.com>
| 2022-12-19 11:15:26 -0800 |
|---|---|---|
| committer |  Andrii Nakryiko <andrii@kernel.org>
| 2022-12-20 15:55:14 -0800 |
| commit | 1520e8466d683b6c5e1aa53aa65165ebd5da46cf (patch) | |
| tree | 7654b3e5333aaf769be4ba0f5cd3d3e872171ffc /tools/lib | |
| parent | docs: BPF_MAP_TYPE_SOCK[MAP|HASH] (diff) | |
| download | linux-1520e8466d683b6c5e1aa53aa65165ebd5da46cf.tar.gz linux-1520e8466d683b6c5e1aa53aa65165ebd5da46cf.tar.bz2 linux-1520e8466d683b6c5e1aa53aa65165ebd5da46cf.zip | |
libbpf: Fix build warning on ref_ctr_off for 32-bit architectures
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))
~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Typecast ref_ctr_off to __u64 in the check conditional, it is false on
32bit anyways.
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221219191526.296264-1-raj.khem@gmail.com
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 2a82f49ce16f..a5c67a3c93c5 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -9903,7 +9903,7 @@ static int perf_event_open_probe(bool uprobe, bool retprobe, const char *name, char errmsg[STRERR_BUFSIZE]; int type, pfd; - if (ref_ctr_off >= (1ULL << PERF_UPROBE_REF_CTR_OFFSET_BITS)) + if ((__u64)ref_ctr_off >= (1ULL << PERF_UPROBE_REF_CTR_OFFSET_BITS)) return -EINVAL; memset(&attr, 0, attr_sz); |