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In April 2014, Linus Torvalds banned Kay Sievers from submitting patches to the Linux kernel for failing to deal with bugs that caused systemd to negatively interact with the kernel.
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regulator_suspend_finish(9) [centos man page]

REGULATOR_SUSPEND_FI(9) 					   API reference					   REGULATOR_SUSPEND_FI(9)

NAME
regulator_suspend_finish - resume regulators from system wide suspend SYNOPSIS
int regulator_suspend_finish(void); ARGUMENTS
void no arguments DESCRIPTION
Turn on regulators that might be turned off by regulator_suspend_prepare and that should be turned on according to the regulators properties. AUTHORS
Liam Girdwood <lrg@slimlogic.co.uk> Author. Mark Brown <broonie@opensource.wolfsonmicro.com> Wolfson Microelectronics, Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 REGULATOR_SUSPEND_FI(9)

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REGULATOR_SET_OPTIMU(9) 					   API reference					   REGULATOR_SET_OPTIMU(9)

NAME
regulator_set_optimum_mode - set regulator optimum operating mode SYNOPSIS
int regulator_set_optimum_mode(struct regulator * regulator, int uA_load); ARGUMENTS
regulator regulator source uA_load load current DESCRIPTION
Notifies the regulator core of a new device load. This is then used by DRMS (if enabled by constraints) to set the most efficient regulator operating mode for the new regulator loading. Consumer devices notify their supply regulator of the maximum power they will require (can be taken from device datasheet in the power consumption tables) when they change operational status and hence power state. Examples of operational state changes that can affect power CONSUMPTION ARE
- o Device is opened / closed. o Device I/O is about to begin or has just finished. o Device is idling in between work. This information is also exported via sysfs to userspace. DRMS will sum the total requested load on the regulator and change to the most efficient operating mode if platform constraints allow. Returns the new regulator mode or error. AUTHORS
Liam Girdwood <lrg@slimlogic.co.uk> Author. Mark Brown <broonie@opensource.wolfsonmicro.com> Wolfson Microelectronics, Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 REGULATOR_SET_OPTIMU(9)

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