[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 4ee3f006b861940f6d27c2b09711504498d59607..0b23b963bb44c2e0d184e9b096e62ef50ac643be 100644 (file)
--- 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")) {