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authorRafael J. Wysocki <rjw@sisk.pl>2011-03-23 22:16:32 +0100
committerRafael J. Wysocki <rjw@sisk.pl>2011-03-23 22:16:32 +0100
commite00e56dfd3cf1d209ce630a2b440c91e4a30bbd3 (patch)
tree4d1329036e250db15411b21b15a158f9042945bd /virt
parentfb3600cc50302c9577b76838fcac1ee78828007d (diff)
cpufreq: Use syscore_ops for boot CPU suspend/resume (v2)
The cpufreq subsystem uses sysdev suspend and resume for executing cpufreq_suspend() and cpufreq_resume(), respectively, during system suspend, after interrupts have been switched off on the boot CPU, and during system resume, while interrupts are still off on the boot CPU. In both cases the other CPUs are off-line at the relevant point (either they have been switched off via CPU hotplug during suspend, or they haven't been switched on yet during resume). For this reason, although it may seem that cpufreq_suspend() and cpufreq_resume() are executed for all CPUs in the system, they are only called for the boot CPU in fact, which is quite confusing. To remove the confusion and to prepare for elimiating sysdev suspend and resume operations from the kernel enirely, convernt cpufreq to using a struct syscore_ops object for the boot CPU suspend and resume and rename the callbacks so that their names reflect their purpose. In addition, put some explanatory remarks into their kerneldoc comments. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions