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powerpc: Drop page_is_ram() and walk_system_ram_range()

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Since commit c40dd2f766 ("powerpc: Add System RAM to /proc/iomem")
it is possible to use the generic walk_system_ram_range() and
the generic page_is_ram().

To enable the use of walk_system_ram_range() by the IBM EHEA ethernet
driver, we still need an export of the generic function.

As powerpc was the only user of CONFIG_ARCH_HAS_WALK_MEMORY, the
ifdef around the generic walk_system_ram_range() has become useless
and can be dropped.

Fixes: c40dd2f766 ("powerpc: Add System RAM to /proc/iomem")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Keep the EXPORT_SYMBOL_GPL in powerpc code]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2019-02-01 10:46:52 +00:00
committed by Michael Ellerman
parent 8e0f973575
commit 26b523356f
4 changed files with 6 additions and 41 deletions
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4
kernel/resource.c
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@@ -448,8 +448,6 @@ int walk_mem_res(u64 start, u64 end, void *arg,
arg, func);
}
#if !defined(CONFIG_ARCH_HAS_WALK_MEMORY)
/*
* This function calls the @func callback against all memory ranges of type
* System RAM which are marked as IORESOURCE_SYSTEM_RAM and IORESOUCE_BUSY.
@@ -481,8 +479,6 @@ int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
return ret;
}
#endif
static int __is_ram(unsigned long pfn, unsigned long nr_pages, void *arg)
{
return 1;