Staging
v0.5.1
v0.5.1
Revision 815fb87b753055df2d9e50f6cd80eb10235fe3e9 authored by Linus Torvalds on 02 December 2023, 00:01:00 UTC, committed by Linus Torvalds on 02 December 2023, 00:01:00 UTC
Pull power management fixes from Rafael Wysocki: "These fix issues in two cpufreq drivers, in the AMD P-state driver and in the power-capping DTPM framework. Specifics: - Fix the AMD P-state driver's EPP sysfs interface in the cases when the performance governor is in use (Ayush Jain) - Make the ->fast_switch() callback in the AMD P-state driver return the target frequency as expected (Gautham R. Shenoy) - Allow user space to control the range of frequencies to use via scaling_min_freq and scaling_max_freq when AMD P-state driver is in use (Wyes Karny) - Prevent power domains needed for wakeup signaling from being turned off during system suspend on Qualcomm systems and prevent performance states votes from runtime-suspended devices from being lost across a system suspend-resume cycle in qcom-cpufreq-nvmem (Stephan Gerhold) - Fix disabling the 792 Mhz OPP in the imx6q cpufreq driver for the i.MX6ULL types that can run at that frequency (Christoph Niedermaier) - Eliminate unnecessary and harmful conversions to uW from the DTPM (dynamic thermal and power management) framework (Lukasz Luba)" * tag 'pm-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq/amd-pstate: Only print supported EPP values for performance governor cpufreq/amd-pstate: Fix scaling_min_freq and scaling_max_freq update powercap: DTPM: Fix unneeded conversions to micro-Watts cpufreq/amd-pstate: Fix the return value of amd_pstate_fast_switch() pmdomain: qcom: rpmpd: Set GENPD_FLAG_ACTIVE_WAKEUP cpufreq: qcom-nvmem: Preserve PM domain votes in system suspend cpufreq: qcom-nvmem: Enable virtual power domain devices cpufreq: imx6q: Don't disable 792 Mhz OPP unnecessarily
refs.h
#ifndef IOU_REQ_REF_H
#define IOU_REQ_REF_H
#include <linux/atomic.h>
#include <linux/io_uring_types.h>
/*
* Shamelessly stolen from the mm implementation of page reference checking,
* see commit f958d7b528b1 for details.
*/
#define req_ref_zero_or_close_to_overflow(req) \
((unsigned int) atomic_read(&(req->refs)) + 127u <= 127u)
static inline bool req_ref_inc_not_zero(struct io_kiocb *req)
{
WARN_ON_ONCE(!(req->flags & REQ_F_REFCOUNT));
return atomic_inc_not_zero(&req->refs);
}
static inline bool req_ref_put_and_test(struct io_kiocb *req)
{
if (likely(!(req->flags & REQ_F_REFCOUNT)))
return true;
WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));
return atomic_dec_and_test(&req->refs);
}
static inline void req_ref_get(struct io_kiocb *req)
{
WARN_ON_ONCE(!(req->flags & REQ_F_REFCOUNT));
WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));
atomic_inc(&req->refs);
}
static inline void __io_req_set_refcount(struct io_kiocb *req, int nr)
{
if (!(req->flags & REQ_F_REFCOUNT)) {
req->flags |= REQ_F_REFCOUNT;
atomic_set(&req->refs, nr);
}
}
static inline void io_req_set_refcount(struct io_kiocb *req)
{
__io_req_set_refcount(req, 1);
}
#endif
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