21 files changed, 74 insertions, 425 deletions

diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
index 5479707eb5d1..acc431c331b0 100644
--- a/arch/csky/Kconfig
+++ b/arch/csky/Kconfig
@@ -64,9 +64,6 @@ config CSKY
 	select GENERIC_IRQ_MULTI_HANDLER
 	select GENERIC_SCHED_CLOCK
 	select GENERIC_SMP_IDLE_THREAD
-	select GENERIC_TIME_VSYSCALL
-	select GENERIC_VDSO_32
-	select GENERIC_GETTIMEOFDAY
 	select GX6605S_TIMER if CPU_CK610
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ARCH_AUDITSYSCALL
@@ -80,7 +77,6 @@ config CSKY
 	select HAVE_DEBUG_KMEMLEAK
 	select HAVE_DYNAMIC_FTRACE
 	select HAVE_DYNAMIC_FTRACE_WITH_REGS
-	select HAVE_GENERIC_VDSO
 	select HAVE_FUNCTION_TRACER
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_FUNCTION_ERROR_INJECTION
diff --git a/arch/csky/abiv1/alignment.c b/arch/csky/abiv1/alignment.c
index e5b8b4b2109a..aee904833dec 100644
--- a/arch/csky/abiv1/alignment.c
+++ b/arch/csky/abiv1/alignment.c
@@ -300,7 +300,7 @@ bad_area:
 	force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)addr);
 }
 
-static struct ctl_table alignment_tbl[5] = {
+static const struct ctl_table alignment_tbl[] = {
 	{
 		.procname = "kernel_enable",
 		.data = &align_kern_enable,
diff --git a/arch/csky/include/asm/Kbuild b/arch/csky/include/asm/Kbuild
index 9a9bc65b57a9..3a5c7f6e5aac 100644
--- a/arch/csky/include/asm/Kbuild
+++ b/arch/csky/include/asm/Kbuild
@@ -11,3 +11,4 @@ generic-y += qspinlock.h
 generic-y += parport.h
 generic-y += user.h
 generic-y += vmlinux.lds.h
+generic-y += text-patching.h
diff --git a/arch/csky/include/asm/io.h b/arch/csky/include/asm/io.h
index 4725bb977b0f..536d3bf32ff1 100644
--- a/arch/csky/include/asm/io.h
+++ b/arch/csky/include/asm/io.h
@@ -32,22 +32,11 @@
 #endif
 
 /*
- * String version of I/O memory access operations.
- */
-extern void __memcpy_fromio(void *, const volatile void __iomem *, size_t);
-extern void __memcpy_toio(volatile void __iomem *, const void *, size_t);
-extern void __memset_io(volatile void __iomem *, int, size_t);
-
-#define memset_io(c,v,l)        __memset_io((c),(v),(l))
-#define memcpy_fromio(a,c,l)    __memcpy_fromio((a),(c),(l))
-#define memcpy_toio(c,a,l)      __memcpy_toio((c),(a),(l))
-
-/*
  * I/O memory mapping functions.
  */
 #define ioremap_wc(addr, size) \
 	ioremap_prot((addr), (size), \
-		(_PAGE_IOREMAP & ~_CACHE_MASK) | _CACHE_UNCACHED)
+		__pgprot((_PAGE_IOREMAP & ~_CACHE_MASK) | _CACHE_UNCACHED))
 
 #include <asm-generic/io.h>
 
diff --git a/arch/csky/include/asm/page.h b/arch/csky/include/asm/page.h
index 0ca6c408c07f..4911d0892b71 100644
--- a/arch/csky/include/asm/page.h
+++ b/arch/csky/include/asm/page.h
@@ -7,12 +7,8 @@
 #include <asm/cache.h>
 #include <linux/const.h>
 
-/*
- * PAGE_SHIFT determines the page size: 4KB
- */
-#define PAGE_SHIFT	CONFIG_PAGE_SHIFT
-#define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
-#define PAGE_MASK	(~(PAGE_SIZE - 1))
+#include <vdso/page.h>
+
 #define THREAD_SIZE	(PAGE_SIZE * 2)
 #define THREAD_MASK	(~(THREAD_SIZE - 1))
 #define THREAD_SHIFT	(PAGE_SHIFT + 1)
@@ -43,9 +39,6 @@ extern void *memcpy(void *to, const void *from, size_t l);
 #define clear_page(page)	memset((page), 0, PAGE_SIZE)
 #define copy_page(to, from)	memcpy((to), (from), PAGE_SIZE)
 
-#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
-#define phys_to_page(paddr)	(pfn_to_page(PFN_DOWN(paddr)))
-
 struct page;
 
 #include <abi/page.h>
diff --git a/arch/csky/include/asm/pgalloc.h b/arch/csky/include/asm/pgalloc.h
index 9c84c9012e53..9ed2b15ffd94 100644
--- a/arch/csky/include/asm/pgalloc.h
+++ b/arch/csky/include/asm/pgalloc.h
@@ -29,7 +29,7 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
 	pte_t *pte;
 	unsigned long i;
 
-	pte = (pte_t *) __get_free_page(GFP_KERNEL);
+	pte = __pte_alloc_one_kernel(mm);
 	if (!pte)
 		return NULL;
 
@@ -44,7 +44,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 	pgd_t *ret;
 	pgd_t *init;
 
-	ret = (pgd_t *) __get_free_page(GFP_KERNEL);
+	ret = __pgd_alloc(mm, 0);
 	if (ret) {
 		init = pgd_offset(&init_mm, 0UL);
 		pgd_init((unsigned long *)ret);
@@ -61,11 +61,8 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 	return ret;
 }
 
-#define __pte_free_tlb(tlb, pte, address)		\
-do {							\
-	pagetable_pte_dtor(page_ptdesc(pte));		\
-	tlb_remove_page_ptdesc(tlb, page_ptdesc(pte));	\
-} while (0)
+#define __pte_free_tlb(tlb, pte, address)	\
+	tlb_remove_ptdesc((tlb), page_ptdesc(pte))
 
 extern void pagetable_init(void);
 extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn);
diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h
index a397e1718ab6..5a394be09c35 100644
--- a/arch/csky/include/asm/pgtable.h
+++ b/arch/csky/include/asm/pgtable.h
@@ -200,7 +200,7 @@ static inline pte_t pte_mkyoung(pte_t pte)
 	return pte;
 }
 
-static inline int pte_swp_exclusive(pte_t pte)
+static inline bool pte_swp_exclusive(pte_t pte)
 {
 	return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
 }
@@ -249,11 +249,6 @@ static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
 	return __pgprot(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 mk_pte(page, pgprot)    pfn_pte(page_to_pfn(page), (pgprot))
 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 {
 	return __pte((pte_val(pte) & _PAGE_CHG_MASK) |
diff --git a/arch/csky/include/asm/syscall.h b/arch/csky/include/asm/syscall.h
index 0de5734950bf..717f44b4d26f 100644
--- a/arch/csky/include/asm/syscall.h
+++ b/arch/csky/include/asm/syscall.h
@@ -59,6 +59,19 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
 	memcpy(args, &regs->a1, 5 * sizeof(args[0]));
 }
 
+static inline void
+syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
+		      const unsigned long *args)
+{
+	memcpy(&regs->a0, args, 6 * sizeof(regs->a0));
+	/*
+	 * Also copy the first argument into orig_a0
+	 * so that syscall_get_arguments() would return it
+	 * instead of the previous value.
+	 */
+	regs->orig_a0 = regs->a0;
+}
+
 static inline int
 syscall_get_arch(struct task_struct *task)
 {
diff --git a/arch/csky/include/asm/vdso/clocksource.h b/arch/csky/include/asm/vdso/clocksource.h
deleted file mode 100644
index dfca7b4724b7..000000000000
--- a/arch/csky/include/asm/vdso/clocksource.h
+++ /dev/null
@@ -1,9 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-
-#ifndef __ASM_VDSO_CSKY_CLOCKSOURCE_H
-#define __ASM_VDSO_CSKY_CLOCKSOURCE_H
-
-#define VDSO_ARCH_CLOCKMODES	\
-	VDSO_CLOCKMODE_ARCHTIMER
-
-#endif /* __ASM_VDSO_CSKY_CLOCKSOURCE_H */
diff --git a/arch/csky/include/asm/vdso/gettimeofday.h b/arch/csky/include/asm/vdso/gettimeofday.h
deleted file mode 100644
index 6c4f1446944f..000000000000
--- a/arch/csky/include/asm/vdso/gettimeofday.h
+++ /dev/null
@@ -1,114 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-
-#ifndef __ASM_VDSO_CSKY_GETTIMEOFDAY_H
-#define __ASM_VDSO_CSKY_GETTIMEOFDAY_H
-
-#ifndef __ASSEMBLY__
-
-#include <asm/barrier.h>
-#include <asm/unistd.h>
-#include <abi/regdef.h>
-#include <uapi/linux/time.h>
-
-#define VDSO_HAS_CLOCK_GETRES	1
-
-static __always_inline
-int gettimeofday_fallback(struct __kernel_old_timeval *_tv,
-			  struct timezone *_tz)
-{
-	register struct __kernel_old_timeval *tv asm("a0") = _tv;
-	register struct timezone *tz asm("a1") = _tz;
-	register long ret asm("a0");
-	register long nr asm(syscallid) = __NR_gettimeofday;
-
-	asm volatile ("trap 0\n"
-		      : "=r" (ret)
-		      : "r"(tv), "r"(tz), "r"(nr)
-		      : "memory");
-
-	return ret;
-}
-
-static __always_inline
-long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
-{
-	register clockid_t clkid asm("a0") = _clkid;
-	register struct __kernel_timespec *ts asm("a1") = _ts;
-	register long ret asm("a0");
-	register long nr asm(syscallid) = __NR_clock_gettime64;
-
-	asm volatile ("trap 0\n"
-		      : "=r" (ret)
-		      : "r"(clkid), "r"(ts), "r"(nr)
-		      : "memory");
-
-	return ret;
-}
-
-static __always_inline
-long clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
-{
-	register clockid_t clkid asm("a0") = _clkid;
-	register struct old_timespec32 *ts asm("a1") = _ts;
-	register long ret asm("a0");
-	register long nr asm(syscallid) = __NR_clock_gettime;
-
-	asm volatile ("trap 0\n"
-		      : "=r" (ret)
-		      : "r"(clkid), "r"(ts), "r"(nr)
-		      : "memory");
-
-	return ret;
-}
-
-static __always_inline
-int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
-{
-	register clockid_t clkid asm("a0") = _clkid;
-	register struct __kernel_timespec *ts asm("a1") = _ts;
-	register long ret asm("a0");
-	register long nr asm(syscallid) = __NR_clock_getres_time64;
-
-	asm volatile ("trap 0\n"
-		      : "=r" (ret)
-		      : "r"(clkid), "r"(ts), "r"(nr)
-		      : "memory");
-
-	return ret;
-}
-
-static __always_inline
-int clock_getres32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
-{
-	register clockid_t clkid asm("a0") = _clkid;
-	register struct old_timespec32 *ts asm("a1") = _ts;
-	register long ret asm("a0");
-	register long nr asm(syscallid) = __NR_clock_getres;
-
-	asm volatile ("trap 0\n"
-		      : "=r" (ret)
-		      : "r"(clkid), "r"(ts), "r"(nr)
-		      : "memory");
-
-	return ret;
-}
-
-uint64_t csky_pmu_read_cc(void);
-static __always_inline u64 __arch_get_hw_counter(s32 clock_mode,
-						 const struct vdso_data *vd)
-{
-#ifdef CONFIG_CSKY_PMU_V1
-	return csky_pmu_read_cc();
-#else
-	return 0;
-#endif
-}
-
-static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
-{
-	return _vdso_data;
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif /* __ASM_VDSO_CSKY_GETTIMEOFDAY_H */
diff --git a/arch/csky/include/asm/vdso/processor.h b/arch/csky/include/asm/vdso/processor.h
deleted file mode 100644
index 39a6b561d0cc..000000000000
--- a/arch/csky/include/asm/vdso/processor.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#ifndef __ASM_VDSO_CSKY_PROCESSOR_H
-#define __ASM_VDSO_CSKY_PROCESSOR_H
-
-#ifndef __ASSEMBLY__
-
-#define cpu_relax()	barrier()
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* __ASM_VDSO_CSKY_PROCESSOR_H */
diff --git a/arch/csky/include/asm/vdso/vsyscall.h b/arch/csky/include/asm/vdso/vsyscall.h
deleted file mode 100644
index c276211a7c4d..000000000000
--- a/arch/csky/include/asm/vdso/vsyscall.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-
-#ifndef __ASM_VDSO_CSKY_VSYSCALL_H
-#define __ASM_VDSO_CSKY_VSYSCALL_H
-
-#ifndef __ASSEMBLY__
-
-#include <vdso/datapage.h>
-
-extern struct vdso_data *vdso_data;
-
-static __always_inline struct vdso_data *__csky_get_k_vdso_data(void)
-{
-	return vdso_data;
-}
-#define __arch_get_k_vdso_data __csky_get_k_vdso_data
-
-#include <asm-generic/vdso/vsyscall.h>
-
-#endif /* !__ASSEMBLY__ */
-
-#endif /* __ASM_VDSO_CSKY_VSYSCALL_H */
diff --git a/arch/csky/kernel/Makefile b/arch/csky/kernel/Makefile
index 8a868316b912..a406a4ac2378 100644
--- a/arch/csky/kernel/Makefile
+++ b/arch/csky/kernel/Makefile
@@ -1,8 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
-extra-y := vmlinux.lds
+always-$(KBUILD_BUILTIN) := vmlinux.lds
 
 obj-y += head.o entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/
-obj-y += power.o syscall.o syscall_table.o setup.o io.o
+obj-y += power.o syscall.o syscall_table.o setup.o
 obj-y += process.o cpu-probe.o ptrace.o stacktrace.o
 obj-y += probes/
 
diff --git a/arch/csky/kernel/io.c b/arch/csky/kernel/io.c
deleted file mode 100644
index 5883f13fa2b1..000000000000
--- a/arch/csky/kernel/io.c
+++ /dev/null
@@ -1,91 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/export.h>
-#include <linux/types.h>
-#include <linux/io.h>
-
-/*
- * Copy data from IO memory space to "real" memory space.
- */
-void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
-{
-	while (count && !IS_ALIGNED((unsigned long)from, 4)) {
-		*(u8 *)to = __raw_readb(from);
-		from++;
-		to++;
-		count--;
-	}
-
-	while (count >= 4) {
-		*(u32 *)to = __raw_readl(from);
-		from += 4;
-		to += 4;
-		count -= 4;
-	}
-
-	while (count) {
-		*(u8 *)to = __raw_readb(from);
-		from++;
-		to++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memcpy_fromio);
-
-/*
- * Copy data from "real" memory space to IO memory space.
- */
-void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
-{
-	while (count && !IS_ALIGNED((unsigned long)to, 4)) {
-		__raw_writeb(*(u8 *)from, to);
-		from++;
-		to++;
-		count--;
-	}
-
-	while (count >= 4) {
-		__raw_writel(*(u32 *)from, to);
-		from += 4;
-		to += 4;
-		count -= 4;
-	}
-
-	while (count) {
-		__raw_writeb(*(u8 *)from, to);
-		from++;
-		to++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memcpy_toio);
-
-/*
- * "memset" on IO memory space.
- */
-void __memset_io(volatile void __iomem *dst, int c, size_t count)
-{
-	u32 qc = (u8)c;
-
-	qc |= qc << 8;
-	qc |= qc << 16;
-
-	while (count && !IS_ALIGNED((unsigned long)dst, 4)) {
-		__raw_writeb(c, dst);
-		dst++;
-		count--;
-	}
-
-	while (count >= 4) {
-		__raw_writel(qc, dst);
-		dst += 4;
-		count -= 4;
-	}
-
-	while (count) {
-		__raw_writeb(c, dst);
-		dst++;
-		count--;
-	}
-}
-EXPORT_SYMBOL(__memset_io);
diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c
index e5f18420ce64..e0a36acd265b 100644
--- a/arch/csky/kernel/perf_event.c
+++ b/arch/csky/kernel/perf_event.c
@@ -1139,8 +1139,7 @@ static irqreturn_t csky_pmu_handle_irq(int irq_num, void *dev)
 		perf_sample_data_init(&data, 0, hwc->last_period);
 		csky_pmu_event_set_period(event);
 
-		if (perf_event_overflow(event, &data, regs))
-			csky_pmu_stop_event(event);
+		perf_event_overflow(event, &data, regs);
 	}
 
 	csky_pmu_enable(&csky_pmu.pmu);
diff --git a/arch/csky/kernel/setup.c b/arch/csky/kernel/setup.c
index 51012e90780d..e0d6ca86ea8c 100644
--- a/arch/csky/kernel/setup.c
+++ b/arch/csky/kernel/setup.c
@@ -12,6 +12,45 @@
 #include <asm/mmu_context.h>
 #include <asm/pgalloc.h>
 
+#ifdef CONFIG_BLK_DEV_INITRD
+static void __init setup_initrd(void)
+{
+	unsigned long size;
+
+	if (initrd_start >= initrd_end) {
+		pr_err("initrd not found or empty");
+		goto disable;
+	}
+
+	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
+		pr_err("initrd extends beyond end of memory");
+		goto disable;
+	}
+
+	size = initrd_end - initrd_start;
+
+	if (memblock_is_region_reserved(__pa(initrd_start), size)) {
+		pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region",
+		       __pa(initrd_start), size);
+		goto disable;
+	}
+
+	memblock_reserve(__pa(initrd_start), size);
+
+	pr_info("Initial ramdisk at: 0x%p (%lu bytes)\n",
+		(void *)(initrd_start), size);
+
+	initrd_below_start_ok = 1;
+
+	return;
+
+disable:
+	initrd_start = initrd_end = 0;
+
+	pr_err(" - disabling initrd\n");
+}
+#endif
+
 static void __init csky_memblock_init(void)
 {
 	unsigned long lowmem_size = PFN_DOWN(LOWMEM_LIMIT - PHYS_OFFSET_OFFSET);
@@ -40,6 +79,10 @@ static void __init csky_memblock_init(void)
 		max_low_pfn = min_low_pfn + sseg_size;
 	}
 
+#ifdef CONFIG_BLK_DEV_INITRD
+	setup_initrd();
+#endif
+
 	max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
 
 	mmu_init(min_low_pfn, max_low_pfn);
@@ -112,9 +155,9 @@ asmlinkage __visible void __init csky_start(unsigned int unused,
 	pre_trap_init();
 
 	if (dtb_start == NULL)
-		early_init_dt_scan(__dtb_start);
+		early_init_dt_scan(__dtb_start, __pa(dtb_start));
 	else
-		early_init_dt_scan(dtb_start);
+		early_init_dt_scan(dtb_start, __pa(dtb_start));
 
 	start_kernel();
 
diff --git a/arch/csky/kernel/vdso.c b/arch/csky/kernel/vdso.c
index 5c9ef63c29f1..c54d019d66bc 100644
--- a/arch/csky/kernel/vdso.c
+++ b/arch/csky/kernel/vdso.c
@@ -8,23 +8,19 @@
 #include <linux/slab.h>
 
 #include <asm/page.h>
-#include <vdso/datapage.h>
 
 extern char vdso_start[], vdso_end[];
 
 static unsigned int vdso_pages;
 static struct page **vdso_pagelist;
 
-static union vdso_data_store vdso_data_store __page_aligned_data;
-struct vdso_data *vdso_data = vdso_data_store.data;
-
 static int __init vdso_init(void)
 {
 	unsigned int i;
 
 	vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;
 	vdso_pagelist =
-		kcalloc(vdso_pages + 1, sizeof(struct page *), GFP_KERNEL);
+		kcalloc(vdso_pages, sizeof(struct page *), GFP_KERNEL);
 	if (unlikely(vdso_pagelist == NULL)) {
 		pr_err("vdso: pagelist allocation failed\n");
 		return -ENOMEM;
@@ -36,7 +32,6 @@ static int __init vdso_init(void)
 		pg = virt_to_page(vdso_start + (i << PAGE_SHIFT));
 		vdso_pagelist[i] = pg;
 	}
-	vdso_pagelist[i] = virt_to_page(vdso_data);
 
 	return 0;
 }
@@ -52,11 +47,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
 	static struct vm_special_mapping vdso_mapping = {
 		.name = "[vdso]",
 	};
-	static struct vm_special_mapping vvar_mapping = {
-		.name = "[vvar]",
-	};
 
-	vdso_len = (vdso_pages + 1) << PAGE_SHIFT;
+	vdso_len = vdso_pages << PAGE_SHIFT;
 
 	mmap_write_lock(mm);
 	vdso_base = get_unmapped_area(NULL, 0, vdso_len, 0, 0);
@@ -85,27 +77,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
 	}
 
 	vdso_base += (vdso_pages << PAGE_SHIFT);
-	vvar_mapping.pages = &vdso_pagelist[vdso_pages];
-	vma = _install_special_mapping(mm, vdso_base, PAGE_SIZE,
-		(VM_READ | VM_MAYREAD), &vvar_mapping);
-
-	if (IS_ERR(vma)) {
-		ret = PTR_ERR(vma);
-		mm->context.vdso = NULL;
-		goto end;
-	}
 	ret = 0;
 end:
 	mmap_write_unlock(mm);
 	return ret;
 }
-
-const char *arch_vma_name(struct vm_area_struct *vma)
-{
-	if (vma->vm_mm && (vma->vm_start == (long)vma->vm_mm->context.vdso))
-		return "[vdso]";
-	if (vma->vm_mm && (vma->vm_start ==
-			   (long)vma->vm_mm->context.vdso + PAGE_SIZE))
-		return "[vdso_data]";
-	return NULL;
-}
diff --git a/arch/csky/kernel/vdso/Makefile b/arch/csky/kernel/vdso/Makefile
index bc2261f5a8d4..a3042287a070 100644
--- a/arch/csky/kernel/vdso/Makefile
+++ b/arch/csky/kernel/vdso/Makefile
@@ -1,11 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 # Include the generic Makefile to check the built vdso.
-include $(srctree)/lib/vdso/Makefile
+include $(srctree)/lib/vdso/Makefile.include
 
 # Symbols present in the vdso
 vdso-syms  += rt_sigreturn
-vdso-syms  += vgettimeofday
 
 # Files to link into the vdso
 obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o
diff --git a/arch/csky/kernel/vdso/vdso.lds.S b/arch/csky/kernel/vdso/vdso.lds.S
index 590a6c79fff7..8d226252d439 100644
--- a/arch/csky/kernel/vdso/vdso.lds.S
+++ b/arch/csky/kernel/vdso/vdso.lds.S
@@ -49,10 +49,6 @@ VERSION
 	LINUX_5.10 {
 	global:
 		__vdso_rt_sigreturn;
-		__vdso_clock_gettime;
-		__vdso_clock_gettime64;
-		__vdso_gettimeofday;
-		__vdso_clock_getres;
 	local: *;
 	};
 }
diff --git a/arch/csky/kernel/vdso/vgettimeofday.c b/arch/csky/kernel/vdso/vgettimeofday.c
deleted file mode 100644
index 55af30e83752..000000000000
--- a/arch/csky/kernel/vdso/vgettimeofday.c
+++ /dev/null
@@ -1,30 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-
-#include <linux/time.h>
-#include <linux/types.h>
-#include <vdso/gettime.h>
-
-extern
-int __vdso_clock_gettime(clockid_t clock,
-			 struct old_timespec32 *ts)
-{
-	return __cvdso_clock_gettime32(clock, ts);
-}
-
-int __vdso_clock_gettime64(clockid_t clock,
-			   struct __kernel_timespec *ts)
-{
-	return __cvdso_clock_gettime(clock, ts);
-}
-
-int __vdso_gettimeofday(struct __kernel_old_timeval *tv,
-			struct timezone *tz)
-{
-	return __cvdso_gettimeofday(tv, tz);
-}
-
-int __vdso_clock_getres(clockid_t clock_id,
-			struct old_timespec32 *res)
-{
-	return __cvdso_clock_getres_time32(clock_id, res);
-}
diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c
index bde7cabd23df..573da66b2543 100644
--- a/arch/csky/mm/init.c
+++ b/arch/csky/mm/init.c
@@ -42,73 +42,6 @@ unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
 						__page_aligned_bss;
 EXPORT_SYMBOL(empty_zero_page);
 
-#ifdef CONFIG_BLK_DEV_INITRD
-static void __init setup_initrd(void)
-{
-	unsigned long size;
-
-	if (initrd_start >= initrd_end) {
-		pr_err("initrd not found or empty");
-		goto disable;
-	}
-
-	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
-		pr_err("initrd extends beyond end of memory");
-		goto disable;
-	}
-
-	size = initrd_end - initrd_start;
-
-	if (memblock_is_region_reserved(__pa(initrd_start), size)) {
-		pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region",
-		       __pa(initrd_start), size);
-		goto disable;
-	}
-
-	memblock_reserve(__pa(initrd_start), size);
-
-	pr_info("Initial ramdisk at: 0x%p (%lu bytes)\n",
-		(void *)(initrd_start), size);
-
-	initrd_below_start_ok = 1;
-
-	return;
-
-disable:
-	initrd_start = initrd_end = 0;
-
-	pr_err(" - disabling initrd\n");
-}
-#endif
-
-void __init mem_init(void)
-{
-#ifdef CONFIG_HIGHMEM
-	unsigned long tmp;
-
-	set_max_mapnr(highend_pfn - ARCH_PFN_OFFSET);
-#else
-	set_max_mapnr(max_low_pfn - ARCH_PFN_OFFSET);
-#endif
-	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
-
-#ifdef CONFIG_BLK_DEV_INITRD
-	setup_initrd();
-#endif
-
-	memblock_free_all();
-
-#ifdef CONFIG_HIGHMEM
-	for (tmp = highstart_pfn; tmp < highend_pfn; tmp++) {
-		struct page *page = pfn_to_page(tmp);
-
-		/* FIXME not sure about */
-		if (!memblock_is_reserved(tmp << PAGE_SHIFT))
-			free_highmem_page(page);
-	}
-#endif
-}
-
 void free_initmem(void)
 {
 	free_initmem_default(-1);