diff options
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_user_pages.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_user_pages.c | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_user_pages.c b/drivers/infiniband/hw/ipath/ipath_user_pages.c index 27034d38b3d..0190edc8044 100644 --- a/drivers/infiniband/hw/ipath/ipath_user_pages.c +++ b/drivers/infiniband/hw/ipath/ipath_user_pages.c @@ -171,32 +171,6 @@ int ipath_get_user_pages(unsigned long start_page, size_t num_pages, return ret; } -/** - * ipath_get_user_pages_nocopy - lock a single page for I/O and mark shared - * @start_page: the page to lock - * @p: the output page structure - * - * This is similar to ipath_get_user_pages, but it's always one page, and we - * mark the page as locked for I/O, and shared. This is used for the user - * process page that contains the destination address for the rcvhdrq tail - * update, so we need to have the vma. If we don't do this, the page can be - * taken away from us on fork, even if the child never touches it, and then - * the user process never sees the tail register updates. - */ -int ipath_get_user_pages_nocopy(unsigned long page, struct page **p) -{ - struct vm_area_struct *vma; - int ret; - - down_write(¤t->mm->mmap_sem); - - ret = __get_user_pages(page, 1, p, &vma); - - up_write(¤t->mm->mmap_sem); - - return ret; -} - void ipath_release_user_pages(struct page **p, size_t num_pages) { down_write(¤t->mm->mmap_sem); |