22 files changed, 153 insertions, 86 deletions
diff --git a/arch/nios2/include/asm/Kbuild b/arch/nios2/include/asm/Kbuild
index 7fe7437555fb..28004301c236 100644
--- a/arch/nios2/include/asm/Kbuild
+++ b/arch/nios2/include/asm/Kbuild
@@ -1,7 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
+syscall-y += syscall_table_32.h
+
 generic-y += cmpxchg.h
 generic-y += extable.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
 generic-y += spinlock.h
 generic-y += user.h
+generic-y += text-patching.h
diff --git a/arch/nios2/include/asm/cacheflush.h b/arch/nios2/include/asm/cacheflush.h
index d0b71dd71287..81484a776b33 100644
--- a/arch/nios2/include/asm/cacheflush.h
+++ b/arch/nios2/include/asm/cacheflush.h
@@ -29,11 +29,16 @@ extern void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr,
 	unsigned long pfn);
 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
 void flush_dcache_page(struct page *page);
+void flush_dcache_folio(struct folio *folio);
+#define flush_dcache_folio flush_dcache_folio
 
 extern void flush_icache_range(unsigned long start, unsigned long end);
-extern void flush_icache_page(struct vm_area_struct *vma, struct page *page);
+void flush_icache_pages(struct vm_area_struct *vma, struct page *page,
+		unsigned int nr);
+#define flush_icache_pages flush_icache_pages
 
 #define flush_cache_vmap(start, end)		flush_dcache_range(start, end)
+#define flush_cache_vmap_early(start, end)	do { } while (0)
 #define flush_cache_vunmap(start, end)		flush_dcache_range(start, end)
 
 extern void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
@@ -48,5 +53,9 @@ extern void invalidate_dcache_range(unsigned long start, unsigned long end);
 
 #define flush_dcache_mmap_lock(mapping)		xa_lock_irq(&mapping->i_pages)
 #define flush_dcache_mmap_unlock(mapping)	xa_unlock_irq(&mapping->i_pages)
+#define flush_dcache_mmap_lock_irqsave(mapping, flags)		\
+		xa_lock_irqsave(&mapping->i_pages, flags)
+#define flush_dcache_mmap_unlock_irqrestore(mapping, flags)	\
+		xa_unlock_irqrestore(&mapping->i_pages, flags)
 
 #endif /* _ASM_NIOS2_CACHEFLUSH_H */
diff --git a/arch/nios2/include/asm/cachetype.h b/arch/nios2/include/asm/cachetype.h
new file mode 100644
index 000000000000..eb9c416b8a1c
--- /dev/null
+++ b/arch/nios2/include/asm/cachetype.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_NIOS2_CACHETYPE_H
+#define __ASM_NIOS2_CACHETYPE_H
+
+#include <asm/page.h>
+#include <asm/cache.h>
+
+#define cpu_dcache_is_aliasing()	(NIOS2_DCACHE_SIZE > PAGE_SIZE)
+
+#endif
diff --git a/arch/nios2/include/asm/entry.h b/arch/nios2/include/asm/entry.h
index bafb7b2ca59f..cb25ed56450a 100644
--- a/arch/nios2/include/asm/entry.h
+++ b/arch/nios2/include/asm/entry.h
@@ -10,7 +10,7 @@
 #ifndef _ASM_NIOS2_ENTRY_H
 #define _ASM_NIOS2_ENTRY_H
 
-#ifdef __ASSEMBLY__
+#ifdef __ASSEMBLER__
 
 #include <asm/processor.h>
 #include <asm/registers.h>
@@ -117,5 +117,5 @@
 	addi	sp, sp, SWITCH_STACK_SIZE
 .endm
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_NIOS2_ENTRY_H */
diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h
index 746853ac7d8d..36e3550673b3 100644
--- a/arch/nios2/include/asm/io.h
+++ b/arch/nios2/include/asm/io.h
@@ -28,9 +28,6 @@
 void __iomem *ioremap(unsigned long physaddr, unsigned long size);
 void iounmap(void __iomem *addr);
 
-/* Pages to physical address... */
-#define page_to_phys(page)	virt_to_phys(page_to_virt(page))
-
 /* Macros used for converting between virtual and physical mappings. */
 #define phys_to_virt(vaddr)	\
 	((void *)((unsigned long)(vaddr) | CONFIG_NIOS2_KERNEL_REGION_BASE))
diff --git a/arch/nios2/include/asm/page.h b/arch/nios2/include/asm/page.h
index 6a989819a7c1..00a51623d38a 100644
--- a/arch/nios2/include/asm/page.h
+++ b/arch/nios2/include/asm/page.h
@@ -18,12 +18,7 @@
 #include <linux/pfn.h>
 #include <linux/const.h>
 
-/*
- * PAGE_SHIFT determines the page size
- */
-#define PAGE_SHIFT	12
-#define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
-#define PAGE_MASK	(~(PAGE_SIZE - 1))
+#include <vdso/page.h>
 
 /*
  * PAGE_OFFSET -- the first address of the first page of memory.
@@ -31,7 +26,7 @@
 #define PAGE_OFFSET	\
 	(CONFIG_NIOS2_MEM_BASE + CONFIG_NIOS2_KERNEL_REGION_BASE)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 /*
  * This gives the physical RAM offset.
@@ -86,15 +81,6 @@ extern struct page *mem_map;
 
 # define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
 
-static inline bool pfn_valid(unsigned long pfn)
-{
-	/* avoid <linux/mm.h> include hell */
-	extern unsigned long max_mapnr;
-	unsigned long pfn_offset = ARCH_PFN_OFFSET;
-
-	return pfn >= pfn_offset && pfn < max_mapnr;
-}
-
 # define virt_to_page(vaddr)	pfn_to_page(PFN_DOWN(virt_to_phys(vaddr)))
 # define virt_addr_valid(vaddr)	pfn_valid(PFN_DOWN(virt_to_phys(vaddr)))
 
@@ -104,6 +90,6 @@ static inline bool pfn_valid(unsigned long pfn)
 
 #include <asm-generic/getorder.h>
 
-#endif /* !__ASSEMBLY__ */
+#endif /* !__ASSEMBLER__ */
 
 #endif /* _ASM_NIOS2_PAGE_H */
diff --git a/arch/nios2/include/asm/pgalloc.h b/arch/nios2/include/asm/pgalloc.h
index ecd1657bb2ce..db122b093a8b 100644
--- a/arch/nios2/include/asm/pgalloc.h
+++ b/arch/nios2/include/asm/pgalloc.h
@@ -28,10 +28,7 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
 
 extern pgd_t *pgd_alloc(struct mm_struct *mm);
 
-#define __pte_free_tlb(tlb, pte, addr)				\
-	do {							\
-		pgtable_pte_page_dtor(pte);			\
-		tlb_remove_page((tlb), (pte));			\
-	} while (0)
+#define __pte_free_tlb(tlb, pte, addr)	\
+	tlb_remove_ptdesc((tlb), page_ptdesc(pte))
 
 #endif /* _ASM_NIOS2_PGALLOC_H */
diff --git a/arch/nios2/include/asm/pgtable-bits.h b/arch/nios2/include/asm/pgtable-bits.h
index bfddff383e89..724f9b08b1d1 100644
--- a/arch/nios2/include/asm/pgtable-bits.h
+++ b/arch/nios2/include/asm/pgtable-bits.h
@@ -31,4 +31,7 @@
 #define _PAGE_ACCESSED	(1<<26)	/* page referenced */
 #define _PAGE_DIRTY	(1<<27)	/* dirty page */
 
+/* We borrow bit 31 to store the exclusive marker in swap PTEs. */
+#define _PAGE_SWP_EXCLUSIVE	(1<<31)
+
 #endif /* _ASM_NIOS2_PGTABLE_BITS_H */
diff --git a/arch/nios2/include/asm/pgtable.h b/arch/nios2/include/asm/pgtable.h
index ab793bc517f5..844dce55569f 100644
--- a/arch/nios2/include/asm/pgtable.h
+++ b/arch/nios2/include/asm/pgtable.h
@@ -25,7 +25,10 @@
 #include <asm-generic/pgtable-nopmd.h>
 
 #define VMALLOC_START		CONFIG_NIOS2_KERNEL_MMU_REGION_BASE
-#define VMALLOC_END		(CONFIG_NIOS2_KERNEL_REGION_BASE - 1)
+#define VMALLOC_END		(CONFIG_NIOS2_KERNEL_REGION_BASE - SZ_32M - 1)
+
+#define MODULES_VADDR		(CONFIG_NIOS2_KERNEL_REGION_BASE - SZ_32M)
+#define MODULES_END		(CONFIG_NIOS2_KERNEL_REGION_BASE - 1)
 
 struct mm_struct;
 
@@ -129,7 +132,7 @@ static inline pte_t pte_mkold(pte_t pte)
 	return pte;
 }
 
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
 {
 	pte_val(pte) |= _PAGE_WRITE;
 	return pte;
@@ -178,14 +181,23 @@ static inline void set_pte(pte_t *ptep, pte_t pteval)
 	*ptep = pteval;
 }
 
-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
-			      pte_t *ptep, pte_t pteval)
-{
-	unsigned long paddr = (unsigned long)page_to_virt(pte_page(pteval));
+#define PFN_PTE_SHIFT		0
 
-	flush_dcache_range(paddr, paddr + PAGE_SIZE);
-	set_pte(ptep, pteval);
+static inline void set_ptes(struct mm_struct *mm, unsigned long addr,
+		pte_t *ptep, pte_t pte, unsigned int nr)
+{
+	unsigned long paddr = (unsigned long)page_to_virt(pte_page(pte));
+
+	flush_dcache_range(paddr, paddr + nr * PAGE_SIZE);
+	for (;;) {
+		set_pte(ptep, pte);
+		if (--nr == 0)
+			break;
+		ptep++;
+		pte_val(pte) += 1;
+	}
 }
+#define set_ptes set_ptes
 
 static inline int pmd_none(pmd_t pmd)
 {
@@ -202,19 +214,13 @@ static inline void pte_clear(struct mm_struct *mm,
 
 	pte_val(null) = (addr >> PAGE_SHIFT) & 0xf;
 
-	set_pte_at(mm, addr, ptep, null);
+	set_pte(ptep, null);
 }
 
 /*
  * Conversion functions: convert a page and protection to a page entry,
  * and a page entry and page directory to the page they refer to.
  */
-#define mk_pte(page, prot)	(pfn_pte(page_to_pfn(page), prot))
-
-/*
- * Conversion functions: convert a page and protection to a page entry,
- * and a page entry and page directory to the page they refer to.
- */
 #define pmd_phys(pmd)		virt_to_phys((void *)pmd_val(pmd))
 #define pmd_pfn(pmd)		(pmd_phys(pmd) >> PAGE_SHIFT)
 #define pmd_page(pmd)		(pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
@@ -232,27 +238,67 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
 		__FILE__, __LINE__, pgd_val(e))
 
 /*
- * Encode and decode a swap entry (must be !pte_none(pte) && !pte_present(pte):
+ * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
+ * are !pte_none() && !pte_present().
+ *
+ * Format of swap PTEs:
  *
- * 31 30 29 28 27 26 25 24 23 22 21 20 19 18 ...  1  0
- *  0  0  0  0 type.  0  0  0  0  0  0 offset.........
+ *   3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
+ *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ *   E < type -> 0 0 0 0 0 0 <-------------- offset --------------->
  *
- * This gives us up to 2**2 = 4 swap files and 2**20 * 4K = 4G per swap file.
+ *   E is the exclusive marker that is not stored in swap entries.
  *
- * Note that the offset field is always non-zero, thus !pte_none(pte) is always
- * true.
+ * Note that the offset field is always non-zero if the swap type is 0, thus
+ * !pte_none() is always true.
  */
-#define __swp_type(swp)		(((swp).val >> 26) & 0x3)
+#define __swp_type(swp)		(((swp).val >> 26) & 0x1f)
 #define __swp_offset(swp)	((swp).val & 0xfffff)
-#define __swp_entry(type, off)	((swp_entry_t) { (((type) & 0x3) << 26) \
+#define __swp_entry(type, off)	((swp_entry_t) { (((type) & 0x1f) << 26) \
 						 | ((off) & 0xfffff) })
 #define __swp_entry_to_pte(swp)	((pte_t) { (swp).val })
 #define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
 
+static inline bool pte_swp_exclusive(pte_t pte)
+{
+	return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
+}
+
+static inline pte_t pte_swp_mkexclusive(pte_t pte)
+{
+	pte_val(pte) |= _PAGE_SWP_EXCLUSIVE;
+	return pte;
+}
+
+static inline pte_t pte_swp_clear_exclusive(pte_t pte)
+{
+	pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE;
+	return pte;
+}
+
 extern void __init paging_init(void);
 extern void __init mmu_init(void);
 
-extern void update_mmu_cache(struct vm_area_struct *vma,
-			     unsigned long address, pte_t *pte);
+void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma,
+		unsigned long address, pte_t *ptep, unsigned int nr);
+
+#define update_mmu_cache(vma, addr, ptep) \
+	update_mmu_cache_range(NULL, vma, addr, ptep, 1)
+
+static inline int pte_same(pte_t pte_a, pte_t pte_b);
+
+#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+static inline int ptep_set_access_flags(struct vm_area_struct *vma,
+					unsigned long address, pte_t *ptep,
+					pte_t entry, int dirty)
+{
+	if (!pte_same(*ptep, entry))
+		set_ptes(vma->vm_mm, address, ptep, entry, 1);
+	/*
+	 * update_mmu_cache will unconditionally execute, handling both
+	 * the case that the PTE changed and the spurious fault case.
+	 */
+	return true;
+}
 
 #endif /* _ASM_NIOS2_PGTABLE_H */
diff --git a/arch/nios2/include/asm/processor.h b/arch/nios2/include/asm/processor.h
index eb44130364a9..d9521c3c2df9 100644
--- a/arch/nios2/include/asm/processor.h
+++ b/arch/nios2/include/asm/processor.h
@@ -36,7 +36,7 @@
 /* Kuser helpers is mapped to this user space address */
 #define KUSER_BASE		0x1000
 #define KUSER_SIZE		(PAGE_SIZE)
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 # define TASK_SIZE		0x7FFF0000UL
 # define TASK_UNMAPPED_BASE	(PAGE_ALIGN(TASK_SIZE / 3))
@@ -72,6 +72,6 @@ extern unsigned long __get_wchan(struct task_struct *p);
 
 #define cpu_relax()	barrier()
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _ASM_NIOS2_PROCESSOR_H */
diff --git a/arch/nios2/include/asm/ptrace.h b/arch/nios2/include/asm/ptrace.h
index 9da34c3022a2..96cbcd40c7ce 100644
--- a/arch/nios2/include/asm/ptrace.h
+++ b/arch/nios2/include/asm/ptrace.h
@@ -18,7 +18,7 @@
 /* This struct defines the way the registers are stored on the
    stack during a system call.  */
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 struct pt_regs {
 	unsigned long  r8;	/* r8-r15 Caller-saved GP registers */
 	unsigned long  r9;
@@ -78,5 +78,5 @@ extern void show_regs(struct pt_regs *);
 
 int do_syscall_trace_enter(void);
 void do_syscall_trace_exit(void);
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_NIOS2_PTRACE_H */
diff --git a/arch/nios2/include/asm/registers.h b/arch/nios2/include/asm/registers.h
index 95b67dd16f81..165dab26221f 100644
--- a/arch/nios2/include/asm/registers.h
+++ b/arch/nios2/include/asm/registers.h
@@ -6,7 +6,7 @@
 #ifndef _ASM_NIOS2_REGISTERS_H
 #define _ASM_NIOS2_REGISTERS_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #include <asm/cpuinfo.h>
 #endif
 
@@ -44,7 +44,7 @@
 
 /* tlbmisc register bits */
 #define TLBMISC_PID_SHIFT	4
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #define TLBMISC_PID_MASK	((1UL << cpuinfo.tlb_pid_num_bits) - 1)
 #endif
 #define TLBMISC_WAY_MASK	0xf
diff --git a/arch/nios2/include/asm/setup.h b/arch/nios2/include/asm/setup.h
index 908a1526d1bd..6d3f26a71cb5 100644
--- a/arch/nios2/include/asm/setup.h
+++ b/arch/nios2/include/asm/setup.h
@@ -8,7 +8,7 @@
 
 #include <asm-generic/setup.h>
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #ifdef __KERNEL__
 
 extern char exception_handler_hook[];
@@ -18,6 +18,6 @@ extern char fast_handler_end[];
 extern void pagetable_init(void);
 
 #endif/* __KERNEL__ */
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _ASM_NIOS2_SETUP_H */
diff --git a/arch/nios2/include/asm/syscall.h b/arch/nios2/include/asm/syscall.h
index fff52205fb65..8e3eb1d689bb 100644
--- a/arch/nios2/include/asm/syscall.h
+++ b/arch/nios2/include/asm/syscall.h
@@ -15,6 +15,11 @@ static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
 	return regs->r2;
 }
 
+static inline void syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr)
+{
+	regs->r2 = nr;
+}
+
 static inline void syscall_rollback(struct task_struct *task,
 				struct pt_regs *regs)
 {
@@ -58,6 +63,17 @@ static inline void syscall_get_arguments(struct task_struct *task,
 	*args   = regs->r9;
 }
 
+static inline void syscall_set_arguments(struct task_struct *task,
+	struct pt_regs *regs, const unsigned long *args)
+{
+	regs->r4 = *args++;
+	regs->r5 = *args++;
+	regs->r6 = *args++;
+	regs->r7 = *args++;
+	regs->r8 = *args++;
+	regs->r9 = *args;
+}
+
 static inline int syscall_get_arch(struct task_struct *task)
 {
 	return AUDIT_ARCH_NIOS2;
diff --git a/arch/nios2/include/asm/syscalls.h b/arch/nios2/include/asm/syscalls.h
index b4d4ed3bf9c8..0e214b0a0ac8 100644
--- a/arch/nios2/include/asm/syscalls.h
+++ b/arch/nios2/include/asm/syscalls.h
@@ -7,6 +7,7 @@
 
 int sys_cacheflush(unsigned long addr, unsigned long len,
 				unsigned int op);
+asmlinkage long __sys_clone3(struct clone_args __user *uargs, size_t size);
 
 #include <asm-generic/syscalls.h>
 
diff --git a/arch/nios2/include/asm/thread_info.h b/arch/nios2/include/asm/thread_info.h
index bcc0e9915ebd..83df79286d62 100644
--- a/arch/nios2/include/asm/thread_info.h
+++ b/arch/nios2/include/asm/thread_info.h
@@ -24,7 +24,7 @@
 #define THREAD_SIZE_ORDER	1
 #define THREAD_SIZE		8192 /* 2 * PAGE_SIZE */
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 /*
  * low level task data that entry.S needs immediate access to
@@ -61,7 +61,7 @@ static inline struct thread_info *current_thread_info(void)
 
 	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
 }
-#endif /* !__ASSEMBLY__ */
+#endif /* !__ASSEMBLER__ */
 
 /*
  * thread information flags
@@ -96,9 +96,6 @@ static inline struct thread_info *current_thread_info(void)
 /* work to do on interrupt/exception return */
 #define _TIF_WORK_MASK		0x0000FFFE
 
-/* work to do on any return to u-space */
-# define _TIF_ALLWORK_MASK	0x0000FFFF
-
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_NIOS2_THREAD_INFO_H */
diff --git a/arch/nios2/include/asm/traps.h b/arch/nios2/include/asm/traps.h
index 82a48473280d..133a3dedbc3e 100644
--- a/arch/nios2/include/asm/traps.h
+++ b/arch/nios2/include/asm/traps.h
@@ -12,8 +12,10 @@
 
 #define TRAP_ID_SYSCALL		0
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 void _exception(int signo, struct pt_regs *regs, int code, unsigned long addr);
+void do_page_fault(struct pt_regs *regs, unsigned long cause,
+		   unsigned long address);
 #endif
 
 #endif /* _ASM_NIOS2_TRAPS_H */
diff --git a/arch/nios2/include/asm/uaccess.h b/arch/nios2/include/asm/uaccess.h
index b8299082adbe..6ccc9a232c23 100644
--- a/arch/nios2/include/asm/uaccess.h
+++ b/arch/nios2/include/asm/uaccess.h
@@ -172,15 +172,15 @@ do {									\
 
 #define __put_user(x, ptr)						\
 ({									\
-	__auto_type __pu_ptr = (ptr);					\
-	typeof(*__pu_ptr) __pu_val = (typeof(*__pu_ptr))(x);		\
+	auto __pu_ptr = (ptr);						\
+	auto __pu_val = (typeof(*__pu_ptr))(x);				\
 	__put_user_common(__pu_val, __pu_ptr);				\
 })
 
 #define put_user(x, ptr)						\
 ({									\
-	__auto_type __pu_ptr = (ptr);					\
-	typeof(*__pu_ptr) __pu_val = (typeof(*__pu_ptr))(x);		\
+	auto __pu_ptr = (ptr);						\
+	auto __pu_val = (typeof(*__pu_ptr))(x);				\
 	access_ok(__pu_ptr, sizeof(*__pu_ptr)) ?			\
 		__put_user_common(__pu_val, __pu_ptr) :			\
 		-EFAULT;						\
diff --git a/arch/nios2/include/asm/unistd.h b/arch/nios2/include/asm/unistd.h
new file mode 100644
index 000000000000..213f6de3cf7b
--- /dev/null
+++ b/arch/nios2/include/asm/unistd.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __ASM_UNISTD_H
+#define __ASM_UNISTD_H
+
+#include <uapi/asm/unistd.h>
+
+#define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SET_GET_RLIMIT
+
+#endif
diff --git a/arch/nios2/include/uapi/asm/Kbuild b/arch/nios2/include/uapi/asm/Kbuild
index e78470141932..2501e82a1a0a 100644
--- a/arch/nios2/include/uapi/asm/Kbuild
+++ b/arch/nios2/include/uapi/asm/Kbuild
@@ -1,2 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
+syscall-y += unistd_32.h
+
 generic-y += ucontext.h
diff --git a/arch/nios2/include/uapi/asm/ptrace.h b/arch/nios2/include/uapi/asm/ptrace.h
index 2b91dbe5bcfe..1298db9f0fc9 100644
--- a/arch/nios2/include/uapi/asm/ptrace.h
+++ b/arch/nios2/include/uapi/asm/ptrace.h
@@ -13,7 +13,7 @@
 #ifndef _UAPI_ASM_NIOS2_PTRACE_H
 #define _UAPI_ASM_NIOS2_PTRACE_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/types.h>
 
@@ -80,5 +80,5 @@ struct user_pt_regs {
 	__u32		regs[49];
 };
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _UAPI_ASM_NIOS2_PTRACE_H */
diff --git a/arch/nios2/include/uapi/asm/unistd.h b/arch/nios2/include/uapi/asm/unistd.h
index 0b4bb1d41b28..1f0e0f5538d9 100644
--- a/arch/nios2/include/uapi/asm/unistd.h
+++ b/arch/nios2/include/uapi/asm/unistd.h
@@ -16,16 +16,4 @@
  *
  */
 
- #define sys_mmap2 sys_mmap_pgoff
-
-#define __ARCH_WANT_RENAMEAT
-#define __ARCH_WANT_STAT64
-#define __ARCH_WANT_SET_GET_RLIMIT
-#define __ARCH_WANT_TIME32_SYSCALLS
-
-/* Use the standard ABI for syscalls */
-#include <asm-generic/unistd.h>
-
-/* Additional Nios II specific syscalls. */
-#define __NR_cacheflush (__NR_arch_specific_syscall)
-__SYSCALL(__NR_cacheflush, sys_cacheflush)
+#include <asm/unistd_32.h>