From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Yinghai Lu <yinghai@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Jiang Liu <liuj97@gmail.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: [PATCH 1/3] mm, nobootmem: fix wrong usage of max_low_pfn
Date: Tue, 19 Mar 2013 14:15:59 +0900 [thread overview]
Message-ID: <1363670161-9214-1-git-send-email-iamjoonsoo.kim@lge.com> (raw)
max_low_pfn reflect the number of _pages_ in the system,
not the maximum PFN. You can easily find that fact in init_bootmem().
So fix it.
Additionally, if 'start_pfn == end_pfn', we don't need to go futher,
so change range check.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 5e07d36..4711e91 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -110,9 +110,9 @@ static unsigned long __init __free_memory_core(phys_addr_t start,
{
unsigned long start_pfn = PFN_UP(start);
unsigned long end_pfn = min_t(unsigned long,
- PFN_DOWN(end), max_low_pfn);
+ PFN_DOWN(end), min_low_pfn);
- if (start_pfn > end_pfn)
+ if (start_pfn >= end_pfn)
return 0;
__free_pages_memory(start_pfn, end_pfn);
--
1.7.9.5
--
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next reply other threads:[~2013-03-19 5:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-19 5:15 Joonsoo Kim [this message]
2013-03-19 5:16 ` [PATCH 2/3] mm, nobootmem: clean-up of free_low_memory_core_early() Joonsoo Kim
2013-03-19 5:50 ` Joonsoo Kim
2013-03-19 5:51 ` Yinghai Lu
2013-03-19 5:58 ` Joonsoo Kim
2013-03-19 5:16 ` [PATCH 3/3] mm, nobootmem: do memset() after memblock_reserve() Joonsoo Kim
2013-03-19 5:53 ` Yinghai Lu
2013-03-19 5:58 ` Joonsoo Kim
2013-03-19 5:47 ` [PATCH 1/3] mm, nobootmem: fix wrong usage of max_low_pfn Yinghai Lu
2013-03-19 6:25 ` Joonsoo Kim
2013-03-19 6:42 ` Joonsoo Kim
2013-03-19 7:35 ` Yinghai Lu
2013-03-19 8:07 ` Joonsoo Kim
2013-03-20 20:18 ` Sam Ravnborg
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