Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/mips/mm/c-r3k.c b/arch/mips/mm/c-r3k.c
index 3466fcd..0ca401d 100644
--- a/arch/mips/mm/c-r3k.c
+++ b/arch/mips/mm/c-r3k.c
@@ -245,7 +245,7 @@
 	pmd_t *pmdp;
 	pte_t *ptep;
 
-	pr_debug("cpage[%08lx,%08lx]\n",
+	pr_debug("cpage[%08llx,%08lx]\n",
 		 cpu_context(smp_processor_id(), mm), addr);
 
 	/* No ASID => no such page in the cache.  */
@@ -274,30 +274,6 @@
 {
 }
 
-static void r3k_flush_cache_sigtramp(unsigned long addr)
-{
-	unsigned long flags;
-
-	pr_debug("csigtramp[%08lx]\n", addr);
-
-	flags = read_c0_status();
-
-	write_c0_status(flags&~ST0_IEC);
-
-	/* Fill the TLB to avoid an exception with caches isolated. */
-	asm(	"lw\t$0, 0x000(%0)\n\t"
-		"lw\t$0, 0x004(%0)\n\t"
-		: : "r" (addr) );
-
-	write_c0_status((ST0_ISC|ST0_SWC|flags)&~ST0_IEC);
-
-	asm(	"sb\t$0, 0x000(%0)\n\t"
-		"sb\t$0, 0x004(%0)\n\t"
-		: : "r" (addr) );
-
-	write_c0_status(flags);
-}
-
 static void r3k_flush_kernel_vmap_range(unsigned long vaddr, int size)
 {
 	BUG();
@@ -331,7 +307,6 @@
 
 	__flush_kernel_vmap_range = r3k_flush_kernel_vmap_range;
 
-	flush_cache_sigtramp = r3k_flush_cache_sigtramp;
 	local_flush_data_cache_page = local_r3k_flush_data_cache_page;
 	flush_data_cache_page = r3k_flush_data_cache_page;