Re: Buggy commit tracked to: "Re: [PATCH 2/9] iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c"
From: Al Viro <viro@zeniv.linux.org.uk>
Date: 2020-10-22 20:09:32
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On Thu, Oct 22, 2020 at 09:06:29PM +0100, Al Viro wrote:
On Thu, Oct 22, 2020 at 08:24:58PM +0100, Al Viro wrote:quoted
Depending upon the calling conventions, compiler might do truncation in caller or in a callee, but it must be done _somewhere_.Unless I'm misreading AAPCS64, "Unlike in the 32-bit AAPCS, named integral values must be narrowed by the callee rather than the caller" in 6.4.2 means that callee must not _not_ expect the upper 32 bits of %x0..%x7 to contain
Sorry, artefact of editing - that's "in 6.4.2 means that callee must _not_ expect the upper 32 bits of %x0..%x7 to contain" obviously.