Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/powerpc/include/asm/slice.h b/arch/powerpc/include/asm/slice.h
index e40406c..c6f466f 100644
--- a/arch/powerpc/include/asm/slice.h
+++ b/arch/powerpc/include/asm/slice.h
@@ -4,12 +4,14 @@
 
 #ifdef CONFIG_PPC_BOOK3S_64
 #include <asm/book3s/64/slice.h>
-#elif defined(CONFIG_PPC64)
-#include <asm/nohash/64/slice.h>
-#elif defined(CONFIG_PPC_MMU_NOHASH)
+#elif defined(CONFIG_PPC_MMU_NOHASH_32)
 #include <asm/nohash/32/slice.h>
 #endif
 
+#ifndef __ASSEMBLY__
+
+struct mm_struct;
+
 #ifdef CONFIG_PPC_MM_SLICES
 
 #ifdef CONFIG_HUGETLB_PAGE
@@ -18,10 +20,6 @@
 #define HAVE_ARCH_UNMAPPED_AREA
 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
 
-#ifndef __ASSEMBLY__
-
-struct mm_struct;
-
 unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len,
 				      unsigned long flags, unsigned int psize,
 				      int topdown);
@@ -32,9 +30,19 @@
 			   unsigned long len, unsigned int psize);
 
 void slice_init_new_context_exec(struct mm_struct *mm);
+void slice_setup_new_exec(void);
 
-#endif /* __ASSEMBLY__ */
+#else /* CONFIG_PPC_MM_SLICES */
+
+static inline void slice_init_new_context_exec(struct mm_struct *mm) {}
+
+static inline unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr)
+{
+	return 0;
+}
 
 #endif /* CONFIG_PPC_MM_SLICES */
 
+#endif /* __ASSEMBLY__ */
+
 #endif /* _ASM_POWERPC_SLICE_H */