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This is the 5.4.115 stable release

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Merge 5.4.115 into android11-5.4-lts

Changes in 5.4.115
	s390/ptrace: return -ENOSYS when invalid syscall is supplied
	gpio: omap: Save and restore sysconfig
	pinctrl: lewisburg: Update number of pins in community
	arm64: dts: allwinner: Revert SD card CD GPIO for Pine64-LTS
	locking/qrwlock: Fix ordering in queued_write_lock_slowpath()
	perf/x86/intel/uncore: Remove uncore extra PCI dev HSWEP_PCI_PCU_3
	perf/x86/kvm: Fix Broadwell Xeon stepping in isolation_ucodes[]
	perf auxtrace: Fix potential NULL pointer dereference
	HID: google: add don USB id
	HID: alps: fix error return code in alps_input_configured()
	HID: wacom: Assign boolean values to a bool variable
	ARM: dts: Fix swapped mmc order for omap3
	net: geneve: check skb is large enough for IPv4/IPv6 header
	s390/entry: save the caller of psw_idle
	xen-netback: Check for hotplug-status existence before watching
	cavium/liquidio: Fix duplicate argument
	csky: change a Kconfig symbol name to fix e1000 build error
	ia64: fix discontig.c section mismatches
	ia64: tools: remove duplicate definition of ia64_mf() on ia64
	x86/crash: Fix crash_setup_memmap_entries() out-of-bounds access
	net: hso: fix NULL-deref on disconnect regression
	USB: CDC-ACM: fix poison/unpoison imbalance
	Linux 5.4.115

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I78fcd7c6304d8b43f59b9ab5a88499e1355a04ba
This commit is contained in:
Greg Kroah-Hartman 2021-04-29 08:54:49 +02:00
commit fd2c566ebc
26 changed files with 94 additions and 67 deletions
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7
kernel/locking/qrwlock.c
View file

@ -61,6 +61,8 @@ EXPORT_SYMBOL(queued_read_lock_slowpath);
*/
void queued_write_lock_slowpath(struct qrwlock *lock)
{
int cnts;
/* Put the writer into the wait queue */
arch_spin_lock(&lock->wait_lock);
@ -74,9 +76,8 @@ void queued_write_lock_slowpath(struct qrwlock *lock)
/* When no more readers or writers, set the locked flag */
do {
atomic_cond_read_acquire(&lock->cnts, VAL == _QW_WAITING);
} while (atomic_cmpxchg_relaxed(&lock->cnts, _QW_WAITING,
_QW_LOCKED) != _QW_WAITING);
cnts = atomic_cond_read_relaxed(&lock->cnts, VAL == _QW_WAITING);
} while (!atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED));
unlock:
arch_spin_unlock(&lock->wait_lock);
}