Re: [PATCH 2/2] Perform check in iov_iter_fault_in_readable() by check_readable_bytes()

[Andi Kleen]

> Is EFAULT really optional on systems with page protection?

It's de facto -- e.g. the x86-64 vsyscalls (getimeofday, time, clock_gettime,
getcpu) never implement it.

-Andi
-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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