[PATCH] powerpc: implement clear_bit_unlock_is_negative_byte()

Michael Ellerman mpe at ellerman.id.au
Sat Feb 18 14:41:57 AEDT 2017

Nicholas Piggin <npiggin at gmail.com> writes:

> Commit b91e1302ad9b8 ("mm: optimize PageWaiters bit use for
> unlock_page()") added a special bitop function to speed up
> unlock_page(). Implement this for powerpc.

I know you wrote this to work on 32 and 64-bit, but I don't have a good
way to test it on 32-bit at the moment as my 32-bit box is blowing

So I've taken this but made it 64-bit only for now.


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