Linus Torvalds a739ceb747 asm-generic: qspinlock: fix queued_spin_value_unlocked() implementation ... [ Upstream commit 125b0bb95d ] We really don't want to do atomic_read() or anything like that, since we already have the value, not the lock. The whole point of this is that we've loaded the lock from memory, and we want to check whether the value we loaded was a locked one or not. The main use of this is the lockref code, which loads both the lock and the reference count in one atomic operation, and then works on that combined value. With the atomic_read(), the compiler would pointlessly spill the value to the stack, in order to then be able to read it back "atomically". This is the qspinlock version of commit c6f4a90022 ("asm-generic: ticket-lock: Optimize arch_spin_value_unlocked()") which fixed this same bug for ticket locks. Cc: Guo Ren <guoren@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Waiman Long <longman@redhat.com> Link: https://lore.kernel.org/all/CAHk-=whNRv0v6kQiV5QO6DJhjH4KEL36vWQ6Re8Csrnh4zbRkQ@mail.gmail.com/ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-12-20 17:01:59 +01:00
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acpi	ACPI: PM: Add acpi_device_fix_up_power_children() function	2023-12-03 07:33:07 +01:00
asm-generic	asm-generic: qspinlock: fix queued_spin_value_unlocked() implementation	2023-12-20 17:01:59 +01:00
clocksource
crypto
drm	drm/atomic-helpers: Invoke end_fb_access while owning plane state	2023-12-13 18:45:25 +01:00
dt-bindings
keys
kunit
kvm	KVM: arm64: timers: Correctly handle TGE flip with CNTPOFF_EL2	2023-10-12 16:55:21 +01:00
linux	PCI/ASPM: Add pci_enable_link_state_locked()	2023-12-20 17:01:53 +01:00
math-emu
media	media: ipu-bridge: increase sensor_name size	2023-11-28 17:19:46 +00:00
memory
misc
net	net/sched: act_ct: Take per-cb reference to tcf_ct_flow_table	2023-12-20 17:01:47 +01:00
pcmcia
ras
rdma	RDMA/core: Fix umem iterator when PAGE_SIZE is greater then HCA pgsz	2023-12-13 18:45:16 +01:00
rv
scsi	scsi: sd: Fix system start for ATA devices	2023-12-08 08:52:17 +01:00
soc	firmware: tegra: Add suspend hook and reset BPMP IPC early on resume	2023-11-20 11:59:16 +01:00
sound	ASoC: soc-dai: add flag to mute and unmute stream during trigger	2023-11-28 17:20:04 +00:00
target
trace	rxrpc: Fix RTT determination to use any ACK as a source	2023-12-03 07:33:02 +01:00
uapi	fuse: Rename DIRECT_IO_RELAX to DIRECT_IO_ALLOW_MMAP	2023-12-20 17:01:51 +01:00
ufs
vdso
video	fbdev: stifb: Make the STI next font pointer a 32-bit signed offset	2023-11-28 17:19:58 +00:00
xen	arm/xen: remove lazy mode related definitions	2023-09-19 07:04:49 +02:00