diff options
author | Dan Streetman <ddstreet@ieee.org> | 2014-10-31 22:41:34 +0300 |
---|---|---|
committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-11-02 02:55:56 +0300 |
commit | 10ccaf178b2b961d8bca252d647ed7ed8aae2a20 (patch) | |
tree | 49c2adaa9a8acb915b490eaf92b52161b396eed6 /arch/arm/mm/highmem.c | |
parent | 325e4114043469e5f9923d902b4d30bcc2be8163 (diff) | |
download | linux-10ccaf178b2b961d8bca252d647ed7ed8aae2a20.tar.xz |
powerpc: use device_online/offline() instead of cpu_up/down()
In powerpc pseries platform dlpar operations, use device_online() and
device_offline() instead of cpu_up() and cpu_down().
Calling cpu_up/down() directly does not update the cpu device offline
field, which is used to online/offline a cpu from sysfs. Calling
device_online/offline() instead keeps the sysfs cpu online value
correct. The hotplug lock, which is required to be held when calling
device_online/offline(), is already held when dlpar_online/offline_cpu()
are called, since they are called only from cpu_probe|release_store().
This patch fixes errors on phyp (PowerVM) systems that have cpu(s)
added/removed using dlpar operations; without this patch, the
/sys/devices/system/cpu/cpuN/online nodes do not correctly show the
online state of added/removed cpus.
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Fixes: 0902a9044fa5 ("Driver core: Use generic offline/online for CPU offline/online")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/arm/mm/highmem.c')
0 files changed, 0 insertions, 0 deletions