hfsplus: Fix undefined __divdi3 in hfsplus_init_header_node()
ERROR: "__divdi3" [fs/hfsplus/hfsplus.ko] undefined! Introduced by commit 099e9245 ("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: NGeert Uytterhoeven <geert@linux-m68k.org> Cc: Vyacheslav Dubeyko <slava@dubeyko.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Showing
想要评论请 注册 或 登录