From: Hugh Dickins <hugh@veritas.com>
Date: Sat, 28 Oct 2006 17:38:41 +0000 (-0700)
Subject: [PATCH] hugetlb: fix size=4G parsing
X-Git-Tag: v2.6.19-rc4~51
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9d7e6ae82da124dc9c579fe1061264ef2a69407;p=linux-2.6

[PATCH] hugetlb: fix size=4G parsing

On 32-bit machines, mount -t hugetlbfs -o size=4G gave a 0GB filesystem,
size=5G gave a 1GB filesystem etc: there's no point in masking size with
HPAGE_MASK just before shifting its lower bits away, and since HPAGE_MASK is a
UL, that removed all the higher bits of the unsigned long long size.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Adam Litke <agl@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 4ee3f006b8..0b23b963bb 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -624,7 +624,6 @@ hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
 				do_div(size, 100);
 				rest++;
 			}
-			size &= HPAGE_MASK;
 			pconfig->nr_blocks = (size >> HPAGE_SHIFT);
 			value = rest;
 		} else if (!strcmp(opt,"nr_inodes")) {