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| author | Andrea Arcangeli <aarcange@redhat.com> | 2015-02-11 15:27:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-11 17:06:05 -0800 |
| commit | 7e339128496284cc21977fba5416166ee81f5172 (patch) | |
| tree | 6af95386953cc67f3f465b966e03cb56f184dd30 /mm/process_vm_access.c | |
| parent | a7b780750e1a1c7833812681e1f8fa30bbb06802 (diff) | |
| download | linux-7e339128496284cc21977fba5416166ee81f5172.tar.bz2 | |
mm: gup: use get_user_pages_unlocked
This allows those get_user_pages calls to pass FAULT_FLAG_ALLOW_RETRY to
the page fault in order to release the mmap_sem during the I/O.
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/process_vm_access.c')
| -rw-r--r-- | mm/process_vm_access.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index 5077afcd9e11..b1597690530c 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -99,11 +99,8 @@ static int process_vm_rw_single_vec(unsigned long addr, size_t bytes; /* Get the pages we're interested in */ - down_read(&mm->mmap_sem); - pages = get_user_pages(task, mm, pa, pages, - vm_write, 0, process_pages, NULL); - up_read(&mm->mmap_sem); - + pages = get_user_pages_unlocked(task, mm, pa, pages, + vm_write, 0, process_pages); if (pages <= 0) return -EFAULT; |