diff options
| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-03-16 18:23:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-03-16 18:23:02 -0700 |
| commit | d528ae0d3dfedea553812c957a6ed1e87feeed8a (patch) | |
| tree | bb535047ccdfde275315091bd9eba0ee6ad0ba08 /mm/memory_hotplug.c | |
| parent | Merge tag 'xfs-4.11-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux (diff) | |
| parent | drivers core: remove assert_held_device_hotplug() (diff) | |
Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton:
"6 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
drivers core: remove assert_held_device_hotplug()
mm: add private lock to serialize memory hotplug operations
mm: don't warn when vmalloc() fails due to a fatal signal
mm, x86: fix native_pud_clear build error
kasan: add a prototype of task_struct to avoid warning
z3fold: fix spinlock unlocking in page reclaim
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 295479b792ec..6fa7208bcd56 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -125,9 +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; @@ -147,6 +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 */ |