pussuw commented on code in PR #15081:
URL: https://github.com/apache/nuttx/pull/15081#discussion_r1875577064


##########
arch/risc-v/include/irq.h:
##########
@@ -703,6 +703,17 @@ irqstate_t up_irq_enable(void);
 int up_cpu_index(void) noinstrument_function;
 #endif /* CONFIG_ARCH_HAVE_MULTICPU */
 
+/****************************************************************************
+ * Schedule acceleration macros
+ ****************************************************************************/
+
+#ifdef CONFIG_RISCV_PERCPU_SCRATCH
+#define up_current_regs()      (this_task()->xcp.regs)
+#define up_this_task()         (*((struct tcb_s **)READ_CSR(CSR_SCRATCH)))

Review Comment:
   Yeah I guess arch.h would be the place then.
   
   Did you test if this is faster than fetching the readytorun head ? I would 
presume reading the memory mapped CSR is just as slow.



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