mm: gup: add __get_user_pages_unlocked to customize gup_flags

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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>

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Andrea Arcangeli 2015-02-11 15:27:20 -08:00 • committed by Linus Torvalds

parent f0818f472d

commit 0fd71a56f4

3 changed files with 49 additions and 15 deletions

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4

include/linux/mm.h

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44

mm/gup.c

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16

mm/nommu.c

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