Messages in this thread | | | Date | Thu, 4 Feb 2016 11:47:18 -0500 | From | Benjamin LaHaise <> | Subject | Re: linux-next: build failure after merge of the aio tree |
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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."
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