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SubjectRe: [PATCH] asm-generic: Fix build when __set_fixmap is absent
On Tue, Feb 09, 2016 at 04:33:34PM +0000, Mark Rutland wrote:
> > >> include/asm-generic/fixmap.h:72:6: error: conflicting types for '__set_fixmap'
> > void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
> > ^
> > In file included from arch/um/include/asm/pgtable.h:11:0,
> > from include/linux/mm.h:67,
> > from include/linux/ring_buffer.h:5,
> > from include/linux/trace_events.h:5,
> > from include/trace/syscall.h:6,
> > from include/linux/syscalls.h:81,
> > from init/main.c:18:
> > arch/um/include/asm/fixmap.h:39:13: note: previous declaration of '__set_fixmap' was here
> > extern void __set_fixmap (enum fixed_addresses idx,
> > ^
>
> The conflict is the type of 'phys'. In arch/um that's an unsigned long
> rather than a phys_addr_t as it is elsewhere.

At a quick grep, we also have:

arch/sh/include/asm/fixmap.h
arch/sh/mm/init.c
arch/sh/mm/nommu.c

> If I convert that to a phys_addr_t the build goes along happily.
>
> Should we change set_fixmap_offset back to a macro function for now, or
> is it simple/correct to change arch/um to use phys_addr_t in
> __set_fixmap?

And sh. I prefer the static inline, though there is more effort needed
to test and get acks ;) (I really don't mind either way).

--
Catalin

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