Author: Julia Lawall <julia@diku.dk> sizeof(dp) is just the size of the pointer. Change it to the size of the referenced structure. A simplified version of the semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @@ expression *x; expression f; type T; @@ *f(…,(T)x,…) // Signed-off-by: Julia Lawall Patchwork: http://patchwork.linux-mips.org/patch/789/ Signed-off-by: Ralf Baechle …