diff --git a/drivers/base/core.c b/drivers/base/core.c index 7c30401a33c8..8e4ce59b950a 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1321,6 +1321,11 @@ int lock_device_hotplug_sysfs(void) return restart_syscall(); } +int trylock_device_hotplug(void) +{ + return mutex_trylock(&device_hotplug_lock); +} + #ifdef CONFIG_SCHED_WALT void lock_device_hotplug_assert(void) { diff --git a/include/linux/device.h b/include/linux/device.h index 7b5ac82614ff..e75a6a4c7e81 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -1592,6 +1592,7 @@ static inline bool device_supports_offline(struct device *dev) extern void lock_device_hotplug(void); extern void unlock_device_hotplug(void); extern int lock_device_hotplug_sysfs(void); +extern int trylock_device_hotplug(void); #ifdef CONFIG_SCHED_WALT extern void lock_device_hotplug_assert(void); #endif diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 7dd64ab7c8ad..11467734f120 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1025,7 +1025,8 @@ bool try_online_one_block(int nid) unsigned long zone_start, zone_size; bool onlined_block = false; - lock_device_hotplug(); + if (!trylock_device_hotplug()) + return false; zone_start = PFN_PHYS(zone->zone_start_pfn); zone_size = zone->spanned_pages << PAGE_SHIFT;