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milos-linux/drivers
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Peter Zijlstra 37aadc687a sched: Unbreak wakeups 
Remove broken task->state references and let wake_up_process() DTRT.

The anti-pattern in these patches breaks the ordering of ->state vs
COND as described in the comment near set_current_state() and can lead
to missed wakeups:

	(OoO load, observes RUNNING)<-.
	for (;;) {                    |
	  t->state = UNINTERRUPTIBLE; |
	  smp_mb();          ,----->  | (observes !COND)
                             |        /
	  if (COND) ---------'       |	COND = 1;
		break;		     `- if (t->state != RUNNING)
					  wake_up_process(t); // not done
	  schedule(); // forever waiting
	}
	t->state = TASK_RUNNING;

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210611082838.160855222@infradead.org
2021-06-18 11:43:06 +02:00
..
accessibility
acpi Merge branch 'acpi-bus' 2021-06-11 17:57:24 +02:00
amba
android
ata
atm
auxdisplay
base drivers/base/memory: fix trying offlining memory blocks with memory holes on aarch64 2021-06-05 08:58:11 -07:00
bcma
block block-5.13-2021-06-12 2021-06-12 11:59:58 -07:00
bluetooth Networking fixes for 5.13-rc5, including fixes from bpf, wireless, 2021-06-04 18:25:39 -07:00
bus Char/Misc driver fixes for 5.13-rc6 2021-06-12 12:13:55 -07:00
cdrom
char Char/misc driver fixes for 5.13-rc3 2021-05-20 06:31:52 -10:00
clk
clocksource
comedi
connector
counter
cpufreq
cpuidle
crypto
cxl
dax
dca
devfreq
dio
dma dmaengine: idxd: Use cpu_feature_enabled() 2021-06-03 16:32:59 +02:00
dma-buf dma-buf: fix unintended pin/unpin warnings 2021-05-20 14:02:27 +02:00
edac
eisa
extcon
firewire
firmware EFI fixes for v5.13-rc 2021-05-23 11:39:02 +02:00
fpga
fsi
gnss
gpio gpio: wcd934x: Fix shift-out-of-bounds error 2021-05-27 09:51:35 +02:00
gpu Merge tag 'amd-drm-fixes-5.13-2021-06-09' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes 2021-06-11 11:17:10 +10:00
greybus
hid HID: asus: Cleanup Asus T101HA keyboard-dock handling 2021-05-27 15:40:35 +02:00
hsi
hv
hwmon hwmon: (tps23861) correct shunt LSB values 2021-06-10 08:40:09 -07:00
hwspinlock
hwtracing
i2c i2c: qcom-geni: Suspend and resume the bus during SYSTEM_SLEEP_PM ops 2021-06-04 22:32:58 +02:00
i3c
ide
idle
iio iio: adc: ad7793: Add missing error code in ad7793_setup() 2021-05-22 08:32:36 +01:00
infiniband IB/mlx5: Fix initializing CQ fragments buffer 2021-06-10 08:59:34 -03:00
input
interconnect
iommu iommu/vt-d: Fix sysfs leak in alloc_iommu() 2021-05-27 16:07:08 +02:00
ipack
irqchip
isdn Networking fixes for 5.13-rc4, including fixes from bpf, netfilter, 2021-05-26 17:44:49 -10:00
leds
lightnvm
macintosh
mailbox
mcb
md block-5.13-2021-06-12 2021-06-12 11:59:58 -07:00
media
memory
memstick
message
mfd
misc misc: rtsx: separate aspm mode into MODE_REG and MODE_CFG 2021-06-09 19:10:22 +02:00
mmc mmc: renesas_sdhi: Fix HS400 on R-Car M3-W+ 2021-06-08 14:56:54 +02:00
most
mtd
mux
net sched: Unbreak wakeups 2021-06-18 11:43:06 +02:00
nfc NFC: nfcmrvl: fix kernel-doc syntax in file headers 2021-05-23 17:26:38 -07:00
ntb
nubus
nvdimm
nvme nvmet: fix freeing unallocated p2pmem 2021-06-02 10:10:38 +03:00
nvmem
of
opp
parisc
parport
pci PCI/MSI: Fix MSIs for generic hosts that use device-tree's "msi-map" 2021-05-25 18:37:37 -05:00
pcmcia
perf
phy phy: Sparx5 Eth SerDes: check return value after calling platform_get_resource() 2021-06-03 11:18:19 +05:30
pinctrl pinctrl: qcom: Make it possible to select SC8180x TLMM 2021-06-09 13:15:20 +02:00
platform platform/mellanox: mlxreg-hotplug: Revert "move to use request_irq by IRQF_NO_AUTOEN flag" 2021-06-04 22:03:13 +02:00
pnp
power
powercap
pps
ps3
ptp
pwm
rapidio
ras
regulator regulator: Fixes for v5.14 2021-06-08 09:41:16 -07:00
remoteproc
reset
rpmsg
rtc
s390 - Fix races in vfio-ccw request handling. 2021-05-29 05:51:53 -10:00
sbus
scsi SCSI fixes on 20210613 2021-06-13 12:25:33 -07:00
sh
siox
slimbus
soc soc: amlogic: meson-clk-measure: remove redundant dev_err call in meson_msr_probe() 2021-05-31 09:26:58 +02:00
soundwire
spi spi: stm32-qspi: Always wait BUSY bit to be cleared in stm32_qspi_wait_cmd() 2021-06-03 13:55:36 +01:00
spmi
ssb
staging staging: ralink-gdma: Remove incorrect author information 2021-06-09 12:07:52 +02:00
target scsi: target: core: Fix warning on realtime kernels 2021-05-31 22:59:13 -04:00
tc
tee OP-TEE use export_uuid() to copy UUID 2021-06-05 15:43:11 -07:00
thermal Merge branch 'sched/urgent' into sched/core, to resolve conflicts 2021-06-18 11:31:25 +02:00
thunderbolt thunderbolt: usb4: Fix NVM read buffer bounds and offset issue 2021-05-20 11:52:58 +03:00
tty serial: 8250_exar: Avoid NULL pointer dereference at ->exit() 2021-06-09 14:40:48 +02:00
uio
usb sched: Unbreak wakeups 2021-06-18 11:43:06 +02:00
vdpa {net,vdpa}/mlx5: Configure interface MAC into mpfs L2 table 2021-05-18 23:01:48 -07:00
vfio vfio/platform: fix module_put call in error flow 2021-05-24 13:40:13 -06:00
vhost
video Revert "fb_defio: Remove custom address_space_operations" 2021-06-01 17:38:40 +02:00
virt
virtio
visorbus
vlynq
vme
w1
watchdog
xen xen-pciback: reconfigure also from backend watch handler 2021-05-21 09:55:16 +02:00
zorro
Kconfig
Makefile