linux-next: build failure after merge of the aio tree
From: bcrl@kvack.org (Benjamin LaHaise)
Date: 2016-02-04 16:47:22
Also in:
linux-next, lkml
On Thu, Feb 04, 2016 at 04:17:42PM +0000, Russell King - ARM Linux wrote:
That's the easy bit!
The problem you're going to run into is here:
#define __get_user_nocheck(x, ptr, size) \
({ \
int __gu_err; \
unsigned long __gu_val; \
__uaccess_begin(); \
__get_user_size(__gu_val, (ptr), (size), __gu_err, -EFAULT); \
__uaccess_end(); \
(x) = (__force __typeof__(*(ptr)))__gu_val; \
__gu_val will be 32-bit, even when you're wanting a 64-bit quantity.
That's where the fun and games start...You're right -- it's quite non-trivial. How evil would it be to make a separate __get_user64() macro? -ben -- "Thought is the essence of where you are now."