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Re: [PATCH] libxc: remove / adjust xc_get_cpufreq_para()'s BUILD_BUG_ON()s
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Juergen Gross <jgross@xxxxxxxx>
- Date: Wed, 23 Aug 2023 15:52:04 +0200
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- Cc: Anthony Perard <anthony.perard@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Jason Andryuk <jandryuk@xxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Delivery-date: Wed, 23 Aug 2023 13:52:14 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 23.08.23 15:47, Jan Beulich wrote:
The full structures cannot match in layout, as soon as a 32-bit tool
stack build comes into play. But it also doesn't need to; the part of
the layouts that needs to match is merely the union that we memcpy()
from the sysctl structure to the xc one. Keep (in adjusted form) only
the relevant ones.
Since the whole block needs touching anyway, move it closer to the
respective memcpy() and use a wrapper macro to limit verbosity.
Fixes: 2381dfab083f ("xen/sysctl: Nest cpufreq scaling options")
Reported-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
Juergen
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