UPROBES_HASH_SZ
for (i = 0; i < UPROBES_HASH_SZ; i++)
static struct mutex uprobes_mmap_mutex[UPROBES_HASH_SZ];
#define uprobes_mmap_hash(v) (&uprobes_mmap_mutex[((unsigned long)(v)) % UPROBES_HASH_SZ])