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author | Andrea Arcangeli <aarcange@redhat.com> | 2015-02-12 00:27:23 +0100 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 02:06:05 +0100 |
commit | a7b780750e1a1c7833812681e1f8fa30bbb06802 (patch) | |
tree | e13f7ac217df9904b5cbc1cb624c9f7c9e2130ac /mm/util.c | |
parent | mm: gup: add __get_user_pages_unlocked to customize gup_flags (diff) | |
download | linux-a7b780750e1a1c7833812681e1f8fa30bbb06802.tar.xz linux-a7b780750e1a1c7833812681e1f8fa30bbb06802.zip |
mm: gup: use get_user_pages_unlocked within get_user_pages_fast
This allows the get_user_pages_fast slow path to release the mmap_sem
before blocking.
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/util.c')
-rw-r--r-- | mm/util.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/mm/util.c b/mm/util.c index fec39d4509a9..f3ef639c4857 100644 --- a/mm/util.c +++ b/mm/util.c @@ -240,14 +240,8 @@ int __weak get_user_pages_fast(unsigned long start, int nr_pages, int write, struct page **pages) { struct mm_struct *mm = current->mm; - int ret; - - down_read(&mm->mmap_sem); - ret = get_user_pages(current, mm, start, nr_pages, - write, 0, pages, NULL); - up_read(&mm->mmap_sem); - - return ret; + return get_user_pages_unlocked(current, mm, start, nr_pages, + write, 0, pages); } EXPORT_SYMBOL_GPL(get_user_pages_fast); |