diff options
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 1d3ed58f92ab..6fa7208bcd56 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -6,6 +6,7 @@ #include <linux/stddef.h> #include <linux/mm.h> +#include <linux/sched/signal.h> #include <linux/swap.h> #include <linux/interrupt.h> #include <linux/pagemap.h> @@ -124,9 +125,12 @@ void put_online_mems(void) } +/* Serializes write accesses to mem_hotplug.active_writer. */ +static DEFINE_MUTEX(memory_add_remove_lock); + void mem_hotplug_begin(void) { - assert_held_device_hotplug(); + mutex_lock(&memory_add_remove_lock); mem_hotplug.active_writer = current; @@ -146,6 +150,7 @@ void mem_hotplug_done(void) mem_hotplug.active_writer = NULL; mutex_unlock(&mem_hotplug.lock); memhp_lock_release(); + mutex_unlock(&memory_add_remove_lock); } /* add this memory to iomem resource */ |