On Tue, 2022-11-15 at 15:22 +0100, Peter Zijlstra wrote:

On Fri, Nov 04, 2022 at 03:35:54PM -0700, Rick Edgecombe wrote:

quoted

+static unsigned long get_user_shstk_addr(void)
+{
+     unsigned long long ssp;
+
+     fpregs_lock_and_load();
+
+     rdmsrl(MSR_IA32_PL3_SSP, ssp);
+
+     fpregs_unlock();
+
+     return ssp;
+}

This doesn't return the shstk addr, unlike what the name suggests,
right?

That's a good point. get_user_ssp() would be a better name.