diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/user_pages.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/user_pages.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c index e341e6dcc388..24b592c6522e 100644 --- a/drivers/infiniband/hw/hfi1/user_pages.c +++ b/drivers/infiniband/hw/hfi1/user_pages.c @@ -91,9 +91,7 @@ bool hfi1_can_pin_pages(struct hfi1_devdata *dd, struct mm_struct *mm, /* Convert to number of pages */ size = DIV_ROUND_UP(size, PAGE_SIZE); - down_read(&mm->mmap_sem); - pinned = mm->pinned_vm; - up_read(&mm->mmap_sem); + pinned = atomic64_read(&mm->pinned_vm); /* First, check the absolute limit against all pinned pages. */ if (pinned + npages >= ulimit && !can_lock) @@ -111,9 +109,7 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np if (ret < 0) return ret; - down_write(&mm->mmap_sem); - mm->pinned_vm += ret; - up_write(&mm->mmap_sem); + atomic64_add(ret, &mm->pinned_vm); return ret; } @@ -130,8 +126,6 @@ void hfi1_release_user_pages(struct mm_struct *mm, struct page **p, } if (mm) { /* during close after signal, mm can be NULL */ - down_write(&mm->mmap_sem); - mm->pinned_vm -= npages; - up_write(&mm->mmap_sem); + atomic64_sub(npages, &mm->pinned_vm); } } |