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Don't feed anything but regular iovec's to blk_rq_map_user_iov
In theory we could map other things, but there's a reason that function is called "user_iov". Using anything else (like splice can do) just confuses it. Reported-and-tested-by: Johannes Thumshirn <firstname.lastname@example.org> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Linus Torvalds <email@example.com>
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