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hfsplus: fix warning with 64k PAGE_SIZE 

fs/hfsplus/btree.c: In function 'hfsplus_bmap_alloc':
fs/hfsplus/btree.c:239: warning: comparison is always false due to limited range of data type

But this might hide a real bug?

Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2008-04-30 00:54:54 -07:00 committed by Linus Torvalds
parent 3e5a509730
commit 487798df6d
1 changed files with 7 additions and 3 deletions
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10
fs/hfsplus/btree.c
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@ -184,7 +184,9 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
struct hfs_bnode *node, *next_node; struct hfs_bnode *node, *next_node;
struct page **pagep; struct page **pagep;
u32 nidx, idx; u32 nidx, idx;
u16 off, len; unsigned off;
u16 off16;
u16 len;
u8 *data, byte, m; u8 *data, byte, m;
int i; int i;
@ -211,7 +213,8 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
node = hfs_bnode_find(tree, nidx); node = hfs_bnode_find(tree, nidx);
if (IS_ERR(node)) if (IS_ERR(node))
return node; return node;
len = hfs_brec_lenoff(node, 2, &off); len = hfs_brec_lenoff(node, 2, &off16);
off = off16;
off += node->page_offset; off += node->page_offset;
pagep = node->page + (off >> PAGE_CACHE_SHIFT); pagep = node->page + (off >> PAGE_CACHE_SHIFT);
@ -256,7 +259,8 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
return next_node; return next_node;
node = next_node; node = next_node;
len = hfs_brec_lenoff(node, 0, &off); len = hfs_brec_lenoff(node, 0, &off16);
off = off16;
off += node->page_offset; off += node->page_offset;
pagep = node->page + (off >> PAGE_CACHE_SHIFT); pagep = node->page + (off >> PAGE_CACHE_SHIFT);
data = kmap(*pagep); data = kmap(*pagep);