zram regression fix backport

[Ben Hutchings]

On Tue, 2013-09-10 at 16:52 +0100, Luis Henriques wrote:
> Hi,
> 
> It is known that commit 57ab048 ("zram: use zram->lock to protect
> zram_free_page() in swap free notify path") has issues that are fixed
> by commit a0c516c ("zram: don't grab mutex in zram_slot_free_noity").
> 
> Commit 57ab048 made its way to some of the stable kernels (3.2, 3.5,
> 3.8 and 3.10 I believe).  However, the backport of this fix (at least
> to the older kernels) doesn't seem to be trivial -- to bring a0c516c
> into these kernels, requires several other commits to be backported.
> 
> So, unless anyone has strong objections about it, I'm inclined to just
> revert 57ab048 from the 3.5 kernel.

Also reverted from 3.2.

Ben.

-- 
Ben Hutchings
Tomorrow will be cancelled due to lack of interest.
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