--- zzzz-none-000/linux-3.18.24/arch/mips/include/asm/thread_info.h	2015-10-31 20:39:51.000000000 +0000
+++ rtl96-5690pro-762/linux-3.18.24/arch/mips/include/asm/thread_info.h	2024-08-14 08:36:36.000000000 +0000
@@ -36,6 +36,7 @@
 						 */
 	struct restart_block	restart_block;
 	struct pt_regs		*regs;
+	long			syscall;	/* syscall number */
 };
 
 /*
@@ -68,6 +69,9 @@
 #endif /* !__ASSEMBLY__ */
 
 /* thread information allocation */
+#ifdef CONFIG_KERNEL_STACK_SIZE_ORDER
+#define THREAD_SIZE_ORDER (CONFIG_KERNEL_STACK_SIZE_ORDER)
+#else
 #if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_32BIT)
 #define THREAD_SIZE_ORDER (1)
 #endif
@@ -86,6 +90,7 @@
 #ifdef CONFIG_PAGE_SIZE_64KB
 #define THREAD_SIZE_ORDER (0)
 #endif
+#endif /* CONFIG_KERNEL_STACK_SIZE_ORDER */
 
 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
 #define THREAD_MASK (THREAD_SIZE - 1UL)
@@ -159,15 +164,19 @@
  * We stash processor id into a COP0 register to retrieve it fast
  * at kernel exception entry.
  */
-#if   defined(CONFIG_MIPS_PGD_C0_CONTEXT)
+#if defined(CONFIG_MIPS_PGD_C0_CONTEXT)
 #define SMP_CPUID_REG		20, 0	/* XCONTEXT */
 #define ASM_SMP_CPUID_REG	$20
 #define SMP_CPUID_PTRSHIFT	48
 #else
 #define SMP_CPUID_REG		4, 0	/* CONTEXT */
 #define ASM_SMP_CPUID_REG	$4
+#ifdef CONFIG_CPU_RLX
+#define SMP_CPUID_PTRSHIFT	21
+#else
 #define SMP_CPUID_PTRSHIFT	23
 #endif
+#endif
 
 #ifdef CONFIG_64BIT
 #define SMP_CPUID_REGSHIFT	(SMP_CPUID_PTRSHIFT + 3)