diff options
Diffstat (limited to 'mm/gup.c')
| -rw-r--r-- | mm/gup.c | 24 |
1 files changed, 13 insertions, 11 deletions
@@ -1845,7 +1845,19 @@ long get_user_pages(unsigned long start, unsigned long nr_pages, EXPORT_SYMBOL(get_user_pages); /** - * get_user_pages_locked() is suitable to replace the form: + * get_user_pages_locked() - variant of get_user_pages() + * + * @start: starting user address + * @nr_pages: number of pages from start to pin + * @gup_flags: flags modifying lookup behaviour + * @pages: array that receives pointers to the pages pinned. + * Should be at least nr_pages long. Or NULL, if caller + * only intends to ensure the pages are faulted in. + * @locked: pointer to lock flag indicating whether lock is held and + * subsequently whether VM_FAULT_RETRY functionality can be + * utilised. Lock must initially be held. + * + * It is suitable to replace the form: * * mmap_read_lock(mm); * do_something() @@ -1861,16 +1873,6 @@ EXPORT_SYMBOL(get_user_pages); * if (locked) * mmap_read_unlock(mm); * - * @start: starting user address - * @nr_pages: number of pages from start to pin - * @gup_flags: flags modifying lookup behaviour - * @pages: array that receives pointers to the pages pinned. - * Should be at least nr_pages long. Or NULL, if caller - * only intends to ensure the pages are faulted in. - * @locked: pointer to lock flag indicating whether lock is held and - * subsequently whether VM_FAULT_RETRY functionality can be - * utilised. Lock must initially be held. - * * We can leverage the VM_FAULT_RETRY functionality in the page fault * paths better by using either get_user_pages_locked() or * get_user_pages_unlocked(). |