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authorDan Streetman <ddstreet@ieee.org>2014-10-31 22:41:34 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2014-11-02 02:55:56 +0300
commit10ccaf178b2b961d8bca252d647ed7ed8aae2a20 (patch)
tree49c2adaa9a8acb915b490eaf92b52161b396eed6 /arch/arm/mm/highmem.c
parent325e4114043469e5f9923d902b4d30bcc2be8163 (diff)
downloadlinux-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')
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