path: root/fs/hfsplus/xattr.c
diff options
authorGeert Uytterhoeven <>2013-11-14 14:32:18 -0800
committerLinus Torvalds <>2013-11-15 09:32:23 +0900
commita99b7069aab8fc3fb4f26d15795dc280b52e38b1 (patch)
treeaa9d2dde6d72e7c5dc1e8ba58cc7da9561f83b55 /fs/hfsplus/xattr.c
parent498d319bb512992ef0784c278fa03679f2f5649d (diff)
hfsplus: Fix undefined __divdi3 in hfsplus_init_header_node()
ERROR: "__divdi3" [fs/hfsplus/hfsplus.ko] undefined! Introduced by commit 099e9245e04d ("hfsplus: implement attributes file's header node initialization code"). i_size_read() returns loff_t, which is long long, i.e. 64-bit. node_size is size_t, which is either 32-bit or 64-bit. Hence "i_size_read(attr_file) / node_size" is a 64-by-32 or 64-by-64 division, causing (some versions of) gcc to emit a call to __divdi3(). Fortunately node_size is actually 16-bit, as the sole caller of hfsplus_init_header_node() passes a u16. Hence change its type from size_t to u16, and use do_div() to perform a 64-by-32 division. Not seen in m68k/allmodconfig in -next, so it really depends on the verion of gcc. Signed-off-by: Geert Uytterhoeven <> Cc: Vyacheslav Dubeyko <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'fs/hfsplus/xattr.c')
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c
index efc85b1377cc..3c6136f98c73 100644
--- a/fs/hfsplus/xattr.c
+++ b/fs/hfsplus/xattr.c
@@ -129,7 +129,7 @@ static int can_set_xattr(struct inode *inode, const char *name,
static void hfsplus_init_header_node(struct inode *attr_file,
u32 clump_size,
- char *buf, size_t node_size)
+ char *buf, u16 node_size)
struct hfs_bnode_desc *desc;
struct hfs_btree_header_rec *head;
@@ -139,8 +139,9 @@ static void hfsplus_init_header_node(struct inode *attr_file,
char *bmp;
u32 used_nodes;
u32 used_bmp_bytes;
+ loff_t tmp;
- hfs_dbg(ATTR_MOD, "init_hdr_attr_file: clump %u, node_size %zu\n",
+ hfs_dbg(ATTR_MOD, "init_hdr_attr_file: clump %u, node_size %u\n",
clump_size, node_size);
/* The end of the node contains list of record offsets */
@@ -154,7 +155,9 @@ static void hfsplus_init_header_node(struct inode *attr_file,
head = (struct hfs_btree_header_rec *)(buf + offset);
head->node_size = cpu_to_be16(node_size);
- head->node_count = cpu_to_be32(i_size_read(attr_file) / node_size);
+ tmp = i_size_read(attr_file);
+ do_div(tmp, node_size);
+ head->node_count = cpu_to_be32(tmp);
head->free_nodes = cpu_to_be32(be32_to_cpu(head->node_count) - 1);
head->clump_size = cpu_to_be32(clump_size);
head->attributes |= cpu_to_be32(HFS_TREE_BIGKEYS | HFS_TREE_VARIDXKEYS);