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From: mcsmonk <mcsmonk@gmail.com>
To: linux-mm@kvack.org
Cc: Sunghyun Jin <mcsmonk@gmail.com>
Subject: [PATCH] mm/percpu.c: Modify calculation of size of populated bitmap of chunk for memory allocation
Date: Thu,  3 Sep 2020 21:41:16 +0900	[thread overview]
Message-ID: <20200903124116.1668-1-mcsmonk@gmail.com> (raw)

From: Sunghyun Jin <mcsmonk@gmail.com>

Variable populated, which is a member of struct pcpu_chunk, is used as a
unit of size of unsigned long.
However, size of populated is miscounted. So, I fix this minor part.

Signed-off-by: Sunghyun Jin <mcsmonk@gmail.com>
---
 mm/percpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/percpu.c b/mm/percpu.c
index f4709629e6de..1ed1a349eab8 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1316,7 +1316,7 @@ static struct pcpu_chunk * __init pcpu_alloc_first_chunk(unsigned long tmp_addr,
 
 	/* allocate chunk */
 	alloc_size = sizeof(struct pcpu_chunk) +
-		BITS_TO_LONGS(region_size >> PAGE_SHIFT);
+		BITS_TO_LONGS(region_size >> PAGE_SHIFT) * sizeof(unsigned long);
 	chunk = memblock_alloc(alloc_size, SMP_CACHE_BYTES);
 	if (!chunk)
 		panic("%s: Failed to allocate %zu bytes\n", __func__,
-- 
2.17.1



             reply	other threads:[~2020-09-03 12:41 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-03 12:41 mcsmonk [this message]
2020-09-03 13:46 ` [PATCH] mm/percpu.c: Modify calculation of size of populated bitmap of chunk for memory allocation Vlastimil Babka
2020-09-03 15:46   ` Dennis Zhou

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