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| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-12-11 10:09:24 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-12-11 12:25:14 -0300 |
| commit | 05267c7eac12627fae3f25dfd203bfdb9941f9ca (patch) | |
| tree | 012aa42195b4b5d63b6208c19c4ffb28c9fdfebc /tools/perf/util/header.c | |
| parent | tools headers kvm: Sync linux/kvm.h with the kernel sources (diff) | |
| download | linux-dev-05267c7eac12627fae3f25dfd203bfdb9941f9ca.tar.xz linux-dev-05267c7eac12627fae3f25dfd203bfdb9941f9ca.zip | |
perf arch: Make the default get_cpuid() return compatible error
Some of the functions calling get_cpuid() propagate back the error it
returns, and all are using errno (positive) values, make the weak
default get_cpuid() function return ENOSYS to be consistent and to allow
checking if this is an arch not providing this function or if a provided
one is having trouble getting the cpuid, to decide if the warning should
be provided to the user or just a debug message should be emitted.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: John Garry <john.garry@huawei.com> # arm64
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/n/tip-lxwjr0cd2eggzx04a780ffrv@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/header.c')
| -rw-r--r-- | tools/perf/util/header.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index becc2d109423..4d39a75551a0 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -850,7 +850,7 @@ int __weak strcmp_cpuid_str(const char *mapcpuid, const char *cpuid) */ int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused) { - return -1; + return ENOSYS; /* Not implemented */ } static int write_cpuid(struct feat_fd *ff, |