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From:   =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= <j.neuschaefer@gmx.net>
To:     linuxppc-dev@lists.ozlabs.org
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        Michael Ellerman <mpe@ellerman.id.au>, linux-mm@kvack.org,
        Joel Stanley <joel@jms.id.au>,
        Christophe LEROY <christophe.leroy@c-s.fr>,
        =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= <j.neuschaefer@gmx.net>,
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        Paul Mackerras <paulus@samba.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Michal Hocko <mhocko@suse.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Balbir Singh <bsingharora@gmail.com>,
        Joe Perches <joe@perches.com>,
        "Oliver O'Halloran" <oohall@gmail.com>
Subject: [PATCH 1/5] powerpc: mm: Simplify page_is_ram by using memblock_is_memory
Date:   Thu, 22 Feb 2018 13:15:12 +0100
Message-Id: <20180222121516.23415-2-j.neuschaefer@gmx.net>
In-Reply-To: <20180222121516.23415-1-j.neuschaefer@gmx.net>
References: <20180222121516.23415-1-j.neuschaefer@gmx.net>
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Sender: linux-kernel-owner@vger.kernel.org
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Instead of open-coding the search in page_is_ram, call memblock_is_memory.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
---
 arch/powerpc/mm/mem.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index fe8c61149fb8..da4e1555d61d 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -85,13 +85,7 @@ int page_is_ram(unsigned long pfn)
 #ifndef CONFIG_PPC64	/* XXX for now */
 	return pfn < max_pfn;
 #else
-	unsigned long paddr = (pfn << PAGE_SHIFT);
-	struct memblock_region *reg;
-
-	for_each_memblock(memory, reg)
-		if (paddr >= reg->base && paddr < (reg->base + reg->size))
-			return 1;
-	return 0;
+	return memblock_is_memory(__pfn_to_phys(pfn));
 #endif
 }
 
-- 
2.16.1