On Tue, Nov 17, 2015 at 10:57:52PM +0100, Arnd Bergmann wrote: It looks, all them are needed.
> > +asmlinkage long compat_sys_mmap2_wrapper(void); > > +#define sys_mmap2 compat_sys_mmap2_wrapper This wrapper checks alignement of pgoff, if page sise is greater than 4K > > +asmlinkage long compat_sys_fstatfs64_wrapper(void); > > +#define compat_sys_fstatfs64 compat_sys_fstatfs64_wrapper > > +asmlinkage long compat_sys_statfs64_wrapper(void); > > +#define compat_sys_statfs64 compat_sys_statfs64_wrapper This two hacks fix an alignment issue. I didn't check all details but it looks like sizeof(compat_statfs64) is different in kernel and library. And this size is passed as 2nd argument to compat syscalls. We can handle it in userspace but I don't see any advantage. All this handlers are shared between ilp32 and aarch32. This is best we came up, as it doesn't add new hacks, but reuses old ones... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
