Re: [PATCH] m32r: mm: fix build warning

From: Andrew Morton
Date: Tue Feb 14 2017 - 17:16:07 EST

On Tue, 14 Feb 2017 22:05:45 +0000 Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx> wrote:

> The build of m32r was giving warning:
> mm/pgtable-generic.c: In function 'ptep_clear_flush':
> mm/pgtable-generic.c:76:20: warning:
> unused variable 'mm' [-Wunused-variable]
> The implementation of ptep_get_and_clear() and pte_accessible()
> does not use 'mm'.

That's because ptep_get_and_clear() and pte_accessible() are
implemented as macros. If they were (static inline) C functions then
this warning wouldn't occur. All the other architectures get this