[PATCH 1/6] mm: change to return bool for ptep_test_and_clear_young()

[Ritesh Harjani (IBM)]

Baolin Wang <baolin.wang at linux.alibaba.com> writes:

> Callers use ptep_test_and_clear_young() to clear the young flag and check
> whether it was set. Change the return type to bool to make the intention
> clearer.
>

Right I checked all callers of ptep_test_and_clear_young(). I agree, we
only need bool here. 

> Signed-off-by: Baolin Wang <baolin.wang at linux.alibaba.com>
> ---
>  arch/arm64/include/asm/pgtable.h             |  8 ++++----
>  arch/arm64/mm/contpte.c                      |  4 ++--
>  arch/microblaze/include/asm/pgtable.h        |  2 +-
>  arch/parisc/include/asm/pgtable.h            |  6 +++---
>  arch/powerpc/include/asm/book3s/32/pgtable.h |  4 ++--
>  arch/powerpc/include/asm/book3s/64/pgtable.h |  6 +++---
>  arch/powerpc/include/asm/nohash/pgtable.h    |  4 ++--

I looked at it because of powerpc changes, but ended up looking into all
call sites anyways. So overall it LGTM (and I agree that we can remove
the unnecessary externs from function declarations)

With that please feel free to add:
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list at gmail.com>