Keir Fraser wrote:
> volatile prevents the asm from being 'moved significantly', according to the
> gcc manual. I take that to mean that reordering is not allowed.
>
That phrase doesn't appear in the gcc manual; in fact, it specifically
says that reordering can happen:
The `volatile' keywo
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Keir Fraser escreveu:
> On 1/11/07 15:30, "Jeremy Fitzhardinge" <[EMAIL PROTECTED]> wrote:
>
>> Glauber de Oliveira Costa wrote:
>>> I in fact have seen bugs with mixed reads and writes to the same cr,
>>> (cr4), but adding the volatile
>>> flag to th
On 1/11/07 15:30, "Jeremy Fitzhardinge" <[EMAIL PROTECTED]> wrote:
> Glauber de Oliveira Costa wrote:
>> I in fact have seen bugs with mixed reads and writes to the same cr,
>> (cr4), but adding the volatile
>> flag to the read function seemed to fix it.
>
> Well, volatile will make a read be rep
Glauber de Oliveira Costa wrote:
> I in fact have seen bugs with mixed reads and writes to the same cr,
> (cr4), but adding the volatile
> flag to the read function seemed to fix it.
Well, volatile will make a read be repeated rather than caching the
previous value, but it has no effect on orderin
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Jeremy Fitzhardinge escreveu:
> Glauber de Oliveira Costa wrote:
>> This patch introduces, and patch callers when needed, native
>> versions for read/write_crX functions, clts and wbinvd.
>>
>> Signed-off-by: Glauber de Oliveira Costa <[EMAIL PROTECTED
Glauber de Oliveira Costa wrote:
> This patch introduces, and patch callers when needed, native
> versions for read/write_crX functions, clts and wbinvd.
>
> Signed-off-by: Glauber de Oliveira Costa <[EMAIL PROTECTED]>
> Signed-off-by: Steven Rostedt <[EMAIL PROTECTED]>
> Acked-by: Jeremy Fitzhardi
This patch introduces, and patch callers when needed, native
versions for read/write_crX functions, clts and wbinvd.
Signed-off-by: Glauber de Oliveira Costa <[EMAIL PROTECTED]>
Signed-off-by: Steven Rostedt <[EMAIL PROTECTED]>
Acked-by: Jeremy Fitzhardinge <[EMAIL PROTECTED]>
---
arch/x86/mm/pag
