diff options
| author | Dan Streetman <ddstreet@ieee.org> | 2014-10-31 15:41:34 -0400 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2014-11-17 14:11:52 +0000 |
| commit | c3e9182213960db3a85849d707717d84c5aa2bf5 (patch) | |
| tree | 645a08336e06e9974722b220b3bb1d15401bcdec /include/linux/init_task.h | |
| parent | 88d0cb9bab78c805f60e68ed667623785ea6c476 (diff) | |
powerpc: use device_online/offline() instead of cpu_up/down()
commit 10ccaf178b2b961d8bca252d647ed7ed8aae2a20 upstream.
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>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'include/linux/init_task.h')
0 files changed, 0 insertions, 0 deletions