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Saves repeating "(void __force *)__uptr" but it's less clear. Using
the output of PTR_RET() to determine the error rather than just
testing IS_ERR() is odd.
For example, I *assume* __gptr_to_uptr() never returns NULL? Because
the __ret would be 0 for the old code. The new version is clearer, IMHO:
it would try to get_user() on that address.
If you hate this variant, I can just s/PTR_RET/PTR_ERR_OR_ZERO/ instead.
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
228b82211b