commit ea0ee33988778fb73e4f45e7c73fb735787e2f32
author Linus Torvalds <torvalds@linux-foundation.org> Fri Nov 10 11:19:11 2017 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> Fri Nov 10 11:19:11 2017 -0800
tree 45ebd3e4347a879157dab48b2bc88f9bf2cf9286
parent 3e81277a6edd6b568c3a091a372dfe6368697b21

Revert "x86: CPU: Fix up "cpu MHz" in /proc/cpuinfo"

This reverts commit 941f5f0f6ef5338814145cf2b813cf1f98873e2f.

Sadly, it turns out that we really can't just do the cross-CPU IPI to
all CPU's to get their proper frequencies, because it's much too
expensive on systems with lots of cores.

So we'll have to revert this for now, and revisit it using a smarter
model (probably doing one system-wide IPI at open time, and doing all
the frequency calculations in parallel).

Reported-by: WANG Chao <chao.wang@ucloud.cn>
Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: Rafael J Wysocki <rafael.j.wysocki@intel.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>