freertos: Fix save_context. Add RSYNC after WSR
RSYNC waits for all previously fetched WSR.* instructions to be performed before inter-
preting the register fields of the next instruction.
@@ -174,6 +174,7 @@ _xt_context_save:
movi a3, PS_INTLEVEL(1) /* For some curious reason the level 1 interrupts */
or a2, a2, a3 /* dont set the intlevel correctly on PS, we need to */
wsr a2, PS /* do this manually */
+ rsync
_not_l1:
rsr a2, PS /* finally umask the window exceptions */
movi a3, ~(PS_EXCM_MASK)
