- On Apr 13, 2021, at 11:06 AM, David Laight david.lai...@aculab.com wrote:
[...]
>
> Hmmm... too much replication.
> You could do:
> #ifdef CONFIG_64BIT
> #define PTR_TYPE u64
> #define PTR_FLD ptr64
> #else
> #define PTR_TYPE u32
> #define PTR_FLD ptr32
> #endif
>
> Then have one copy of
From: Mathieu Desnoyers
> Sent: 13 April 2021 15:22
...
> > David
> >
> >> So I suppose that if we're going to #ifdef this, we might as well do the
> >> whole thing.
> >>
> >> Mathieu; did I forget a reason why this cannot work?
>
> The only difference it brings on 32-bit is that the
- On Apr 13, 2021, at 6:36 AM, David Laight david.lai...@aculab.com wrote:
> From: Peter Zijlstra
>> Sent: 13 April 2021 10:10
>>
>> On Tue, Apr 13, 2021 at 12:36:57AM -0700, Eric Dumazet wrote:
>> > From: Eric Dumazet
>> >
>> > Commit ec9c82e03a74 ("rseq: uapi: Declare rseq_cs field as
From: Peter Zijlstra
> Sent: 13 April 2021 10:10
>
> On Tue, Apr 13, 2021 at 12:36:57AM -0700, Eric Dumazet wrote:
> > From: Eric Dumazet
> >
> > Commit ec9c82e03a74 ("rseq: uapi: Declare rseq_cs field as union,
> > update includes") added regressions for our servers.
> >
> > Using
On Tue, Apr 13, 2021 at 12:36:57AM -0700, Eric Dumazet wrote:
> From: Eric Dumazet
>
> Commit ec9c82e03a74 ("rseq: uapi: Declare rseq_cs field as union,
> update includes") added regressions for our servers.
>
> Using copy_from_user() and clear_user() for 64bit values
> on 64bit arches is
From: Eric Dumazet
Commit ec9c82e03a74 ("rseq: uapi: Declare rseq_cs field as union,
update includes") added regressions for our servers.
Using copy_from_user() and clear_user() for 64bit values
on 64bit arches is suboptimal.
We might revisit this patch once all 32bit arches support
get_user()
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