APPLIED: SRU LP 1400349 new arm64 optimized copy_to_user and copy_from_user assembly code

[Brad Figg]

On Wed, Dec 10, 2014 at 03:24:56PM -0500, Craig Magina wrote:
> This contains a new optimization patch that has been tested and
> verified not to have the same memory corruption issue as the previous.
> The logs for the bug reproduction and testing done with this new patch
> can be found attached to the bug [1].
> 
> [1] BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1400349
> 
> 
> Trusty
> 
> The following changes since commit f943c19de5a4af319761aa30f79c7ba8f5aa36ed:
> 
>   When ring buffer returns an error indicating retry, storvsc may not
> return a proper error code to SCSI when bounce buffer is not used.
> This has introduced I/O freeze on RAID running atop storvsc devices.
> This patch fixes it by always returning a proper error code.
> (2014-12-10 08:56:25 -0800)
> 
> are available in the git repository at:
> 
>   git://kernel.ubuntu.com/cmagina/trusty-xgene.git lp1400349
> 
> for you to fetch changes up to e4ca122ed833316245489f947cab61e7d531169e:
> 
>   arm64: optimized copy_to_user and copy_from_user assembly code
> (2014-12-10 14:44:43 -0500)
> 
> ----------------------------------------------------------------
> Feng Kan (1):
>       arm64: optimized copy_to_user and copy_from_user assembly code
> 
>  arch/arm64/lib/copy_from_user.S |  87 ++++++++++++++++----------
>  arch/arm64/lib/copy_template.S  | 212
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  arch/arm64/lib/copy_to_user.S   |  57 +++++++++--------
>  3 files changed, 297 insertions(+), 59 deletions(-)
>  create mode 100644 arch/arm64/lib/copy_template.S
> 
> 
> Utopic
> 
> The following changes since commit 6a61c55d0fa1cb7c854fb4307bbdcffffe82b797:
> 
>   sched/x86: Fix up typo in topology detection (2014-12-10 11:35:05 -0800)
> 
> are available in the git repository at:
> 
>   git://kernel.ubuntu.com/cmagina/utopic-xgene.git lp1400349
> 
> for you to fetch changes up to 15b90f5363eeb088d014b59155f848bfcdc4dc1f:
> 
>   arm64: optimized copy_to_user and copy_from_user assembly code
> (2014-12-10 14:55:10 -0500)
> 
> ----------------------------------------------------------------
> Feng Kan (1):
>       arm64: optimized copy_to_user and copy_from_user assembly code
> 
>  arch/arm64/lib/copy_from_user.S |  87 ++++++++++++++++----------
>  arch/arm64/lib/copy_template.S  | 212
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  arch/arm64/lib/copy_to_user.S   |  57 +++++++++--------
>  3 files changed, 297 insertions(+), 59 deletions(-)
>  create mode 100644 arch/arm64/lib/copy_template.S
> 
> 
> Vivid
> 
> The following changes since commit cf7e9f183f6f7e96cc0eb4ee9ddcd2f525613190:
> 
>   UBUNTU: [Config] CONFIG_FW_LOADER_USER_HELPER_FALLBACK=n (2014-12-10
> 11:50:01 -0800)
> 
> are available in the git repository at:
> 
>   git://kernel.ubuntu.com/cmagina/vivid-xgene.git lp1400349
> 
> for you to fetch changes up to db1847d8c6eba863a38ef9027efce52801f5f456:
> 
>   arm64: optimized copy_to_user and copy_from_user assembly code
> (2014-12-10 15:11:49 -0500)
> 
> ----------------------------------------------------------------
> Feng Kan (1):
>       arm64: optimized copy_to_user and copy_from_user assembly code
> 
>  arch/arm64/lib/copy_from_user.S |  87 ++++++++++++++++----------
>  arch/arm64/lib/copy_template.S  | 212
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  arch/arm64/lib/copy_to_user.S   |  57 +++++++++--------
>  3 files changed, 297 insertions(+), 59 deletions(-)
>  create mode 100644 arch/arm64/lib/copy_template.S
> 
> Thanks,
> -- 
> Craig Magina
> 
> -- 
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team

Applied to Trusty master-next
Applied to Utopic master-next

-- 
Brad Figg brad.figg at canonical.com http://www.canonical.com