APPLIED: [SRU][Bionic][Cosmic][PATCH 0/1] powerpc/vdso: Correct call frame information

[Khaled Elmously]

On 2018-10-16 10:17:54 , Joseph Salisbury wrote:
> BugLink: https://bugs.launchpad.net/bugs/1797963
> 
> == SRU Justification ==
> IBM is requesting this commit in Bionic and Cosmic.  They report that they 
> are not able to unwind the stack from within __kernel_clock_gettime in the 
> Linux vDSO on Summit. This affects both DDT and MAP (via GDB and libunwind). 
> The issue is more serious than may first appear as the function appears to 
> be called somewhat often by the CUDA runtime, and can defer to a syscall 
> making it relatively time consuming (making it more likely to be encountered).
> 
> This commit is currently still in linux-next.
> 
> == Fix ==
> 56d20861c027 ("powerpc/vdso: Correct call frame information") linux-next
> 
> == Regression Potential ==
> Low.  Limited to powerpc.
> 
> == Test Case ==
> A test kernel was built with this patch and tested by the original bug reporter.
> The bug reporter states the test kernel resolved the bug.
> 
> Alan Modra (1):
>   powerpc/vdso: Correct call frame information
> 
>  arch/powerpc/kernel/vdso32/datapage.S     | 1 +
>  arch/powerpc/kernel/vdso32/gettimeofday.S | 1 +
>  arch/powerpc/kernel/vdso64/datapage.S     | 1 +
>  arch/powerpc/kernel/vdso64/gettimeofday.S | 1 +
>  4 files changed, 4 insertions(+)
> 
> -- 
> 2.7.4
> 
> 
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