diff options
| author | Andrea Arcangeli <aarcange@redhat.com> | 2015-02-12 02:27:20 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 04:06:05 +0300 |
| commit | 0fd71a56f41d4ffabeda1dae9ff5ed4f34d4e935 (patch) | |
| tree | bf1844624a69986ad308c298b894e1890977af91 /mm/nommu.c | |
| parent | f0818f472d8d527a96ec9cc2c3a56223497f9dd3 (diff) | |
| download | linux-0fd71a56f41d4ffabeda1dae9ff5ed4f34d4e935.tar.xz | |
mm: gup: add __get_user_pages_unlocked to customize gup_flags
Some callers (like KVM) may want to set the gup_flags like FOLL_HWPOSION
to get a proper -EHWPOSION retval instead of -EFAULT to take a more
appropriate action if get_user_pages runs into a memory failure.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Peter Feiner <pfeiner@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/nommu.c')
| -rw-r--r-- | mm/nommu.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index bfb690b0f986..4d1b8a199867 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -224,9 +224,10 @@ long get_user_pages_locked(struct task_struct *tsk, struct mm_struct *mm, } EXPORT_SYMBOL(get_user_pages_locked); -long get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm, - unsigned long start, unsigned long nr_pages, - int write, int force, struct page **pages) +long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm, + unsigned long start, unsigned long nr_pages, + int write, int force, struct page **pages, + unsigned int gup_flags) { long ret; down_read(&mm->mmap_sem); @@ -235,6 +236,15 @@ long get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm, up_read(&mm->mmap_sem); return ret; } +EXPORT_SYMBOL(__get_user_pages_unlocked); + +long get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm, + unsigned long start, unsigned long nr_pages, + int write, int force, struct page **pages) +{ + return __get_user_pages_unlocked(tsk, mm, start, nr_pages, write, + force, pages, 0); +} EXPORT_SYMBOL(get_user_pages_unlocked); /** |