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
notif.h
// SPDX-License-Identifier: GPL-2.0
#include <linux/net.h>
#include <linux/uio.h>
#include <net/sock.h>
#include <linux/nospec.h>
#include "rsrc.h"
#define IO_NOTIF_UBUF_FLAGS (SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN)
#define IO_NOTIF_SPLICE_BATCH 32
struct io_notif_data {
struct file *file;
struct ubuf_info uarg;
unsigned long account_pages;
bool zc_report;
bool zc_used;
bool zc_copied;
};
struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx);
void io_notif_set_extended(struct io_kiocb *notif);
static inline struct io_notif_data *io_notif_to_data(struct io_kiocb *notif)
{
return io_kiocb_to_cmd(notif, struct io_notif_data);
}
static inline void io_notif_flush(struct io_kiocb *notif)
__must_hold(¬if->ctx->uring_lock)
{
struct io_notif_data *nd = io_notif_to_data(notif);
/* drop slot's master ref */
if (refcount_dec_and_test(&nd->uarg.refcnt))
__io_req_task_work_add(notif, IOU_F_TWQ_LAZY_WAKE);
}
static inline int io_notif_account_mem(struct io_kiocb *notif, unsigned len)
{
struct io_ring_ctx *ctx = notif->ctx;
struct io_notif_data *nd = io_notif_to_data(notif);
unsigned nr_pages = (len >> PAGE_SHIFT) + 2;
int ret;
if (ctx->user) {
ret = __io_account_mem(ctx->user, nr_pages);
if (ret)
return ret;
nd->account_pages += nr_pages;
}
return 0;
}
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