linux-kernel - [PATCH 2/5] powerpc: mm: Use memblock API for PPC32 page_is

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Message-Id: <20180222121516.23415-3-j.neuschaefer@gmx.net>
Date:   Thu, 22 Feb 2018 13:15:13 +0100
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>, linux-mm@...ck.org,
        Joel Stanley <joel@....id.au>,
        Christophe LEROY <christophe.leroy@....fr>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Balbir Singh <bsingharora@...il.com>,
        "Oliver O'Halloran" <oohall@...il.com>,
        Joe Perches <joe@...ches.com>
Subject: [PATCH 2/5] powerpc: mm: Use memblock API for PPC32 page_is_ram

To support accurate checking for different blocks of memory on PPC32,
use the same memblock-based approach that's already used on PPC64 also
on PPC32.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@....net>
---
 arch/powerpc/mm/mem.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index da4e1555d61d..a42b86e2a34c 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -82,11 +82,7 @@ static inline pte_t *virt_to_kpte(unsigned long vaddr)
 
 int page_is_ram(unsigned long pfn)
 {
-#ifndef CONFIG_PPC64	/* XXX for now */
-	return pfn < max_pfn;
-#else
 	return memblock_is_memory(__pfn_to_phys(pfn));
-#endif
 }
 
 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
-- 
2.16.1