locations: /usr/src/linux/include/linux/

fs.h
#define NR_OPEN 256

change to:
#define NR_OPEN 1024


limits.h
#define NR_OPEN		 256

change to:
#define NR_OPEN          1024

#define OPEN_MAX         256	/* # open files a process may have */

change to:
#define OPEN_MAX         1024   /* # open files a process may have */