On Wed, Aug 15, 2012 at 03:34:04PM +0100, Arnd Bergmann wrote:

On Tuesday 14 August 2012, Catalin Marinas wrote:

quoted

+asmlinkage int compat_sys_personality(compat_ulong_t personality)
+{
+	int ret;
+
+	if (personality(current->personality) == PER_LINUX32 &&
+		personality == PER_LINUX)
+		personality = PER_LINUX32;
+	ret = sys_personality(personality);
+	if (ret == PER_LINUX32)
+		ret = PER_LINUX;
+	return ret;
+}

Where did you get this from?

You should not need compat_sys_personality, just call the native function.

Hmm, but in that case an aarch32 application doing a personality(PER_LINUX)
syscall will start seeing the wrong uname.

Will