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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-11-03 18:35:49 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-03 18:50:13 +0300 |
commit | 941f5f0f6ef5338814145cf2b813cf1f98873e2f (patch) | |
tree | b5bfebf297b5213cb5ef96af994c5cc84b64e9bb /arch/mips/include/asm/mips-gic.h | |
parent | 5cb0512c02ecd7e6214e912e4c150f4219ac78e0 (diff) | |
download | linux-941f5f0f6ef5338814145cf2b813cf1f98873e2f.tar.xz |
x86: CPU: Fix up "cpu MHz" in /proc/cpuinfo
Commit 890da9cf0983 (Revert "x86: do not use cpufreq_quick_get() for
/proc/cpuinfo "cpu MHz"") is not sufficient to restore the previous
behavior of "cpu MHz" in /proc/cpuinfo on x86 due to some changes
made after the commit it has reverted.
To address this, make the code in question use arch_freq_get_on_cpu()
which also is used by cpufreq for reporting the current frequency of
CPUs and since that function doesn't really depend on cpufreq in any
way, drop the CONFIG_CPU_FREQ dependency for the object file
containing it.
Also refactor arch_freq_get_on_cpu() somewhat to avoid IPIs and
return cached values right away if it is called very often over a
short time (to prevent user space from triggering IPI storms through
it).
Fixes: 890da9cf0983 (Revert "x86: do not use cpufreq_quick_get() for /proc/cpuinfo "cpu MHz"")
Cc: stable@kernel.org # 4.13 - together with 890da9cf0983
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/mips/include/asm/mips-gic.h')
0 files changed, 0 insertions, 0 deletions