linux-kernel - [PATCH] btrfs: fix decompress buffer size

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Date:	Thu, 14 Feb 2013 18:12:19 +0900
From:	Kyungsik Lee <kyungsik.lee@....com>
To:	Chris Mason <chris.mason@...ionio.com>,
	Li Zefan <lizf@...fujitsu.com>, linux-btrfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	hyojun.im@....com, chan.jeong@....com, raphael.andy.lee@...il.com,
	Kyungsik Lee <kyungsik.lee@....com>
Subject: [PATCH] btrfs: fix decompress buffer size

lzo1x_1_compress() is unnecessarily used for allocating decompress buffer.

Signed-off-by: Kyungsik Lee <kyungsik.lee@....com>
---
 fs/btrfs/lzo.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c
index 743b86f..223893a 100644
--- a/fs/btrfs/lzo.c
+++ b/fs/btrfs/lzo.c
@@ -55,7 +55,7 @@ static struct list_head *lzo_alloc_workspace(void)
 		return ERR_PTR(-ENOMEM);
 
 	workspace->mem = vmalloc(LZO1X_MEM_COMPRESS);
-	workspace->buf = vmalloc(lzo1x_worst_compress(PAGE_CACHE_SIZE));
+	workspace->buf = vmalloc(PAGE_CACHE_SIZE);
 	workspace->cbuf = vmalloc(lzo1x_worst_compress(PAGE_CACHE_SIZE));
 	if (!workspace->mem || !workspace->buf || !workspace->cbuf)
 		goto fail;
@@ -349,7 +349,7 @@ cont:
 			}
 		}
 
-		out_len = lzo1x_worst_compress(PAGE_CACHE_SIZE);
+		out_len = PAGE_CACHE_SIZE;
 		ret = lzo1x_decompress_safe(buf, in_len, workspace->buf,
 					    &out_len);
 		if (need_unmap)
-- 
1.8.0.3

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