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Bugzilla Bug 6791
  Add PROT_SAO define to mman.h to support Strong Access Ordering Last modified: 2008-08-08 05:14
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Bug#: 6791   Hardware:   Reporter: Pete Eberlein <eberlein@us.ibm.com>
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Status: RESOLVED   Priority:  
Resolution: FIXED   Severity:  
Assigned To: Ulrich Drepper <drepper@redhat.com>   Target Milestone:  
Flags: Requestee:
  backport ()
  examined ()
  testsuite ()
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Attachment Description Type Created Actions
20080730-libc-prot_sao.patch Patch to add PROT_SAO to mman.h patch 2008-07-30 22:56 Edit | Diff
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Description:   Last confirmed: 0000-00-00 00:00 Opened: 2008-07-30 22:47
This enhancement request is to add the define for PROT_SAO to powerpc/mman.h to
match the latest changes in the Linux kernel.  This define enables a new
hardware feature on Power7 to be used by applications to specify pages in a
process's address space that exhibit a stronger memory consistency model, Strong
Access Ordering.

The justification for the kernel change is in this changeset:

http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/
linux-2.6.git;a=commit;h=ef3d3246a0d06be622867d21af25f997aeeb105f

The change to powerpc/mman.h is
 here:
http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/
linux-2.
6.git;a=commitdiff;h=aba46c5027cb59d98052231b36efcbbde9c77a1d;hp=b845f313d78e4e259ec449909e3bbadf77b53a6d

This patch will create the PROT_SAO define in
libc/sysdeps/unix/sysv/linux/powerpc/bits/mman.h to match the linux kernel
header in powerpc/mman.h.

------- Additional Comment #1 From Pete Eberlein 2008-07-30 22:56 -------
Created an attachment (id=2841)
Patch to add PROT_SAO to mman.h

Attached patch.

------- Additional Comment #2 From Pete Eberlein 2008-07-31 23:12 -------
link to the message on libc-alpha where this is submitted:

http://sourceware.org/ml/libc-alpha/2008-07/msg00040.html

------- Additional Comment #3 From Ulrich Drepper 2008-08-08 05:14 -------
- there is no reason to not sort the value numerically
- the comments all end with a period
- you didn't update the copyright year

I fixed all this up myself.

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