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new helper: iter_is_iovec()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-12-17 04:46:46 -05:00
parent b1bc6d7f16
commit 777eda2c5b
3 changed files with 7 additions and 2 deletions
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5
include/linux/uio.h
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@ -101,6 +101,11 @@ static inline size_t iov_iter_count(struct iov_iter *i)
return i->count;
}
static inline bool iter_is_iovec(struct iov_iter *i)
{
return !(i->type & (ITER_BVEC | ITER_KVEC));
}
/*
* Cap the iov_iter by given limit; note that the second argument is
* *not* the new size - it's upper limit for such. Passing it a value