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userfaultfd: convert to use anon_inode_getfd()
Nothing actually calls userfaultfd_file_create() besides the userfaultfd() system call itself. So simplify things by folding it into the system call and using anon_inode_getfd() instead of anon_inode_getfile(). Do the same in resolve_userfault_fork() as well. This removes over 50 lines with no change in functionality. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Eric Biggers <[email protected]> Reviewed-by: Mike Rapoport <[email protected]> Cc: Andrea Arcangeli <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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