Messages in this thread | | | Date | Mon, 10 Nov 2014 06:58:17 +0000 | From | Al Viro <> | Subject | Re: [PATCH 1/4] inet: Add skb_copy_datagram_iter |
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On Mon, Nov 10, 2014 at 12:20:20AM -0500, David Miller wrote: > From: Al Viro <viro@ZenIV.linux.org.uk> > Date: Sun, 9 Nov 2014 21:19:08 +0000 > > > 1) does sparc64 access_ok() need to differ for 32bit and 64bit tasks? > > sparc64 will just fault no matter what kind of task it is. > > It is impossible for a user task to generate a reference to > a kernel virtual address, as kernel and user accesses each > go via a separate address space identifier.
Sure, but why do we have access_ok() there at all? I.e. why not just have it constant 1?
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