On Sat, May 14, 2016 at 06:03:52PM +0300, Yury Norov wrote: > +SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, > + unsigned long, prot, unsigned long, flags, unsigned long, fd, > + unsigned long, pgoff) To avoid the types confusion we could add __SC_WRAP to mmap2 in unistd.h and use COMPAT_SYSCALL_DEFINE6 here (together with compat_ptr_t etc.). > +{ > + if (pgoff & (~PAGE_MASK >> 12)) > + return -EINVAL; > + > + return sys_mmap_pgoff((compat_uptr_t) addr, (compat_size_t) len, > + (int) prot, (int) flags, (int) fd, > + pgoff >> (PAGE_SHIFT-12)); Then we wouldn't need the explicit casting here. > +} > + > +COMPAT_SYSCALL_DEFINE4(pread64, unsigned int, fd, compat_uptr_t __user *, ubuf, > + compat_size_t, count, off_t, offset) > +{ > + return sys_pread64(fd, (char *) ubuf, count, offset); > +} > + > +COMPAT_SYSCALL_DEFINE4(pwrite64, unsigned int, fd, compat_uptr_t __user *, ubuf, > + compat_size_t, count, off_t, offset) > +{ > + return sys_pwrite64(fd, (char *) ubuf, count, offset); Nitpick: no space between cast type and variable name: (char *)ubuf, ... We can also make these functions static as they are not used outside this file. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html