Re: [PATCH v4.4 backport 16/16] powerpc/64s: Allow control of RFI flush via debugfs
From: Greg KH <hidden>
Date: 2018-02-04 11:31:02
Also in:
stable
On Sun, Feb 04, 2018 at 04:00:10PM +1100, Michael Ellerman wrote:
commit 236003e6b5443c45c18e613d2b0d776a9f87540e upstream.
Expose the state of the RFI flush (enabled/disabled) via debugfs, and
allow it to be enabled/disabled at runtime.
eg: $ cat /sys/kernel/debug/powerpc/rfi_flush
1
$ echo 0 > /sys/kernel/debug/powerpc/rfi_flush
$ cat /sys/kernel/debug/powerpc/rfi_flush
0
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/kernel/setup_64.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)Also applied to 4.9.y and 4.14.y, thanks. greg k-h