On Tue, Feb 02, 2010 at 03:36:51PM +0100, Arnd Bergmann wrote: > > - return (long)old; > > + return (long)(old == PER_LINUX32 ? PER_LINUX : old); > > } > > What does this do for a native 64 bit process setting PER_LINUX32? > It looks to me like it could never set it back to the original > value, or am I missing something here? > > It's what the arch specific code does already, but it seems a bit > strange anyway. Indeed, this prevents a process from going back to 64bit. And while the setarch tool in util-linux also allows going back to 64-bit the typical use case seems to be going into 32-bit mode. But if the consensus is that we should fix this properly I can replace the patch with one introducing a compat_sys_personality which only gets used for compat tasks. -- 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
