19 files changed, 57 insertions, 317 deletions

diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h
index b4bf754f7d..89f73d1a4e 100644
--- a/arch/mips/include/asm/bitops.h
+++ b/arch/mips/include/asm/bitops.h
@@ -73,7 +73,8 @@ int __mips_test_and_clear_bit(unsigned long nr,
 			      volatile unsigned long *addr);
 int __mips_test_and_change_bit(unsigned long nr,
 			       volatile unsigned long *addr);
-
+bool __mips_xor_is_negative_byte(unsigned long mask,
+		volatile unsigned long *addr);
 
 /*
  * set_bit - Atomically set a bit in memory
@@ -279,6 +280,28 @@ static inline int test_and_change_bit(unsigned long nr,
 	return res;
 }
 
+static inline bool xor_unlock_is_negative_byte(unsigned long mask,
+		volatile unsigned long *p)
+{
+	unsigned long orig;
+	bool res;
+
+	smp_mb__before_atomic();
+
+	if (!kernel_uses_llsc) {
+		res = __mips_xor_is_negative_byte(mask, p);
+	} else {
+		orig = __test_bit_op(*p, "%0",
+				     "xor\t%1, %0, %3",
+				     "ir"(mask));
+		res = (orig & BIT(7)) != 0;
+	}
+
+	smp_llsc_mb();
+
+	return res;
+}
+
 #undef __bit_op
 #undef __test_bit_op
 
diff --git a/arch/mips/include/asm/cacheflush.h b/arch/mips/include/asm/cacheflush.h
index f36c2519ed..1f14132b3f 100644
--- a/arch/mips/include/asm/cacheflush.h
+++ b/arch/mips/include/asm/cacheflush.h
@@ -97,6 +97,8 @@ static inline void flush_cache_vmap(unsigned long start, unsigned long end)
 		__flush_cache_vmap();
 }
 
+#define flush_cache_vmap_early(start, end)     do { } while (0)
+
 extern void (*__flush_cache_vunmap)(void);
 
 static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
diff --git a/arch/mips/include/asm/checksum.h b/arch/mips/include/asm/checksum.h
index 4044eaf989..0921ddda11 100644
--- a/arch/mips/include/asm/checksum.h
+++ b/arch/mips/include/asm/checksum.h
@@ -241,7 +241,8 @@ static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
 	"	.set	pop"
 	: "=&r" (sum), "=&r" (tmp)
 	: "r" (saddr), "r" (daddr),
-	  "0" (htonl(len)), "r" (htonl(proto)), "r" (sum));
+	  "0" (htonl(len)), "r" (htonl(proto)), "r" (sum)
+	: "memory");
 
 	return csum_fold(sum);
 }
diff --git a/arch/mips/include/asm/fb.h b/arch/mips/include/asm/fb.h
index 18b7226403..d98d6681d6 100644
--- a/arch/mips/include/asm/fb.h
+++ b/arch/mips/include/asm/fb.h
@@ -3,14 +3,13 @@
 
 #include <asm/page.h>
 
-struct file;
-
-static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
-				unsigned long off)
+static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
+					  unsigned long vm_start, unsigned long vm_end,
+					  unsigned long offset)
 {
-	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+	return pgprot_noncached(prot);
 }
-#define fb_pgprotect fb_pgprotect
+#define pgprot_framebuffer pgprot_framebuffer
 
 /*
  * MIPS doesn't define __raw_ I/O macros, so the helpers
diff --git a/arch/mips/include/asm/jump_label.h b/arch/mips/include/asm/jump_label.h
index c5c6864e64..405c85173f 100644
--- a/arch/mips/include/asm/jump_label.h
+++ b/arch/mips/include/asm/jump_label.h
@@ -36,7 +36,7 @@
 
 static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
 {
-	asm_volatile_goto("1:\t" B_INSN " 2f\n\t"
+	asm goto("1:\t" B_INSN " 2f\n\t"
 		"2:\t.insn\n\t"
 		".pushsection __jump_table,  \"aw\"\n\t"
 		WORD_INSN " 1b, %l[l_yes], %0\n\t"
@@ -50,7 +50,7 @@ l_yes:
 
 static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
 {
-	asm_volatile_goto("1:\t" J_INSN " %l[l_yes]\n\t"
+	asm goto("1:\t" J_INSN " %l[l_yes]\n\t"
 		".pushsection __jump_table,  \"aw\"\n\t"
 		WORD_INSN " 1b, %l[l_yes], %0\n\t"
 		".popsection\n\t"
diff --git a/arch/mips/include/asm/kexec.h b/arch/mips/include/asm/kexec.h
index d6d5fa5cc3..69e579e41e 100644
--- a/arch/mips/include/asm/kexec.h
+++ b/arch/mips/include/asm/kexec.h
@@ -31,7 +31,7 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
 		prepare_frametrace(newregs);
 }
 
-#ifdef CONFIG_KEXEC
+#ifdef CONFIG_KEXEC_CORE
 struct kimage;
 extern unsigned long kexec_args[4];
 extern int (*_machine_kexec_prepare)(struct kimage *);
diff --git a/arch/mips/include/asm/kprobes.h b/arch/mips/include/asm/kprobes.h
index 68b1e5d458..bc27d99c94 100644
--- a/arch/mips/include/asm/kprobes.h
+++ b/arch/mips/include/asm/kprobes.h
@@ -71,8 +71,6 @@ struct kprobe_ctlblk {
 	struct prev_kprobe prev_kprobe;
 };
 
-extern int kprobe_exceptions_notify(struct notifier_block *self,
-				    unsigned long val, void *data);
 
 #endif /* CONFIG_KPROBES */
 #endif /* _ASM_KPROBES_H */
diff --git a/arch/mips/include/asm/local.h b/arch/mips/include/asm/local.h
index e6ae3df034..86fc240222 100644
--- a/arch/mips/include/asm/local.h
+++ b/arch/mips/include/asm/local.h
@@ -108,22 +108,27 @@ static __inline__ bool local_try_cmpxchg(local_t *l, long *old, long new)
 #define local_xchg(l, n) (atomic_long_xchg((&(l)->a), (n)))
 
 /**
- * local_add_unless - add unless the number is a given value
+ * local_add_unless - add unless the number is already a given value
  * @l: pointer of type local_t
  * @a: the amount to add to l...
  * @u: ...unless l is equal to u.
  *
- * Atomically adds @a to @l, so long as it was not @u.
- * Returns non-zero if @l was not @u, and zero otherwise.
+ * Atomically adds @a to @l, if @v was not already @u.
+ * Returns true if the addition was done.
  */
-#define local_add_unless(l, a, u)				\
-({								\
-	long c, old;						\
-	c = local_read(l);					\
-	while (c != (u) && (old = local_cmpxchg((l), c, c + (a))) != c) \
-		c = old;					\
-	c != (u);						\
-})
+static __inline__ bool
+local_add_unless(local_t *l, long a, long u)
+{
+	long c = local_read(l);
+
+	do {
+		if (unlikely(c == u))
+			return false;
+	} while (!local_try_cmpxchg(l, &c, c + a));
+
+	return true;
+}
+
 #define local_inc_not_zero(l) local_add_unless((l), 1, 0)
 
 #define local_dec_return(l) local_sub_return(1, (l))
diff --git a/arch/mips/include/asm/mach-ar7/ar7.h b/arch/mips/include/asm/mach-ar7/ar7.h
deleted file mode 100644
index 1e8621a6af..0000000000
--- a/arch/mips/include/asm/mach-ar7/ar7.h
+++ /dev/null
@@ -1,191 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (C) 2006,2007 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2006,2007 Eugene Konev <ejka@openwrt.org>
- */
-
-#ifndef __AR7_H__
-#define __AR7_H__
-
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/errno.h>
-
-#include <asm/addrspace.h>
-
-#define AR7_SDRAM_BASE	0x14000000
-
-#define AR7_REGS_BASE	0x08610000
-
-#define AR7_REGS_MAC0	(AR7_REGS_BASE + 0x0000)
-#define AR7_REGS_GPIO	(AR7_REGS_BASE + 0x0900)
-/* 0x08610A00 - 0x08610BFF (512 bytes, 128 bytes / clock) */
-#define AR7_REGS_POWER	(AR7_REGS_BASE + 0x0a00)
-#define AR7_REGS_CLOCKS (AR7_REGS_POWER + 0x80)
-#define UR8_REGS_CLOCKS (AR7_REGS_POWER + 0x20)
-#define AR7_REGS_UART0	(AR7_REGS_BASE + 0x0e00)
-#define AR7_REGS_USB	(AR7_REGS_BASE + 0x1200)
-#define AR7_REGS_RESET	(AR7_REGS_BASE + 0x1600)
-#define AR7_REGS_PINSEL (AR7_REGS_BASE + 0x160C)
-#define AR7_REGS_VLYNQ0 (AR7_REGS_BASE + 0x1800)
-#define AR7_REGS_DCL	(AR7_REGS_BASE + 0x1a00)
-#define AR7_REGS_VLYNQ1 (AR7_REGS_BASE + 0x1c00)
-#define AR7_REGS_MDIO	(AR7_REGS_BASE + 0x1e00)
-#define AR7_REGS_IRQ	(AR7_REGS_BASE + 0x2400)
-#define AR7_REGS_MAC1	(AR7_REGS_BASE + 0x2800)
-
-#define AR7_REGS_WDT	(AR7_REGS_BASE + 0x1f00)
-#define UR8_REGS_WDT	(AR7_REGS_BASE + 0x0b00)
-#define UR8_REGS_UART1	(AR7_REGS_BASE + 0x0f00)
-
-/* Titan registers */
-#define TITAN_REGS_ESWITCH_BASE (0x08640000)
-#define TITAN_REGS_MAC0		(TITAN_REGS_ESWITCH_BASE)
-#define TITAN_REGS_MAC1		(TITAN_REGS_ESWITCH_BASE + 0x0800)
-#define TITAN_REGS_MDIO		(TITAN_REGS_ESWITCH_BASE + 0x02000)
-#define TITAN_REGS_VLYNQ0	(AR7_REGS_BASE + 0x1c00)
-#define TITAN_REGS_VLYNQ1	(AR7_REGS_BASE + 0x1300)
-
-#define AR7_RESET_PERIPHERAL	0x0
-#define AR7_RESET_SOFTWARE	0x4
-#define AR7_RESET_STATUS	0x8
-
-#define AR7_RESET_BIT_CPMAC_LO	17
-#define AR7_RESET_BIT_CPMAC_HI	21
-#define AR7_RESET_BIT_MDIO	22
-#define AR7_RESET_BIT_EPHY	26
-
-#define TITAN_RESET_BIT_EPHY1	28
-
-/* GPIO control registers */
-#define AR7_GPIO_INPUT	0x0
-#define AR7_GPIO_OUTPUT 0x4
-#define AR7_GPIO_DIR	0x8
-#define AR7_GPIO_ENABLE 0xc
-#define TITAN_GPIO_INPUT_0	0x0
-#define TITAN_GPIO_INPUT_1	0x4
-#define TITAN_GPIO_OUTPUT_0	0x8
-#define TITAN_GPIO_OUTPUT_1	0xc
-#define TITAN_GPIO_DIR_0	0x10
-#define TITAN_GPIO_DIR_1	0x14
-#define TITAN_GPIO_ENBL_0	0x18
-#define TITAN_GPIO_ENBL_1	0x1c
-
-#define AR7_CHIP_7100	0x18
-#define AR7_CHIP_7200	0x2b
-#define AR7_CHIP_7300	0x05
-#define AR7_CHIP_TITAN	0x07
-#define TITAN_CHIP_1050 0x0f
-#define TITAN_CHIP_1055 0x0e
-#define TITAN_CHIP_1056 0x0d
-#define TITAN_CHIP_1060 0x07
-
-/* Interrupts */
-#define AR7_IRQ_UART0	15
-#define AR7_IRQ_UART1	16
-
-/* Clocks */
-#define AR7_AFE_CLOCK	35328000
-#define AR7_REF_CLOCK	25000000
-#define AR7_XTAL_CLOCK	24000000
-
-/* DCL */
-#define AR7_WDT_HW_ENA	0x10
-
-struct plat_cpmac_data {
-	int reset_bit;
-	int power_bit;
-	u32 phy_mask;
-	char dev_addr[6];
-};
-
-struct plat_dsl_data {
-	int reset_bit_dsl;
-	int reset_bit_sar;
-};
-
-static inline int ar7_is_titan(void)
-{
-	return (readl((void *)KSEG1ADDR(AR7_REGS_GPIO + 0x24)) & 0xffff) ==
-		AR7_CHIP_TITAN;
-}
-
-static inline u16 ar7_chip_id(void)
-{
-	return ar7_is_titan() ? AR7_CHIP_TITAN : (readl((void *)
-		KSEG1ADDR(AR7_REGS_GPIO + 0x14)) & 0xffff);
-}
-
-static inline u16 titan_chip_id(void)
-{
-	unsigned int val = readl((void *)KSEG1ADDR(AR7_REGS_GPIO +
-						TITAN_GPIO_INPUT_1));
-	return ((val >> 12) & 0x0f);
-}
-
-static inline u8 ar7_chip_rev(void)
-{
-	return (readl((void *)KSEG1ADDR(AR7_REGS_GPIO + (ar7_is_titan() ? 0x24 :
-		0x14))) >> 16) & 0xff;
-}
-
-static inline int ar7_has_high_cpmac(void)
-{
-	u16 chip_id = ar7_chip_id();
-	switch (chip_id) {
-	case AR7_CHIP_7100:
-	case AR7_CHIP_7200:
-		return 0;
-	case AR7_CHIP_7300:
-		return 1;
-	default:
-		return -ENXIO;
-	}
-}
-#define ar7_has_high_vlynq ar7_has_high_cpmac
-#define ar7_has_second_uart ar7_has_high_cpmac
-
-static inline void ar7_device_enable(u32 bit)
-{
-	void *reset_reg =
-		(void *)KSEG1ADDR(AR7_REGS_RESET + AR7_RESET_PERIPHERAL);
-	writel(readl(reset_reg) | (1 << bit), reset_reg);
-	msleep(20);
-}
-
-static inline void ar7_device_disable(u32 bit)
-{
-	void *reset_reg =
-		(void *)KSEG1ADDR(AR7_REGS_RESET + AR7_RESET_PERIPHERAL);
-	writel(readl(reset_reg) & ~(1 << bit), reset_reg);
-	msleep(20);
-}
-
-static inline void ar7_device_reset(u32 bit)
-{
-	ar7_device_disable(bit);
-	ar7_device_enable(bit);
-}
-
-static inline void ar7_device_on(u32 bit)
-{
-	void *power_reg = (void *)KSEG1ADDR(AR7_REGS_POWER);
-	writel(readl(power_reg) | (1 << bit), power_reg);
-	msleep(20);
-}
-
-static inline void ar7_device_off(u32 bit)
-{
-	void *power_reg = (void *)KSEG1ADDR(AR7_REGS_POWER);
-	writel(readl(power_reg) & ~(1 << bit), power_reg);
-	msleep(20);
-}
-
-int __init ar7_gpio_init(void);
-void __init ar7_init_clocks(void);
-
-/* Board specific GPIO functions */
-int ar7_gpio_enable(unsigned gpio);
-int ar7_gpio_disable(unsigned gpio);
-
-#endif /* __AR7_H__ */
diff --git a/arch/mips/include/asm/mach-ar7/irq.h b/arch/mips/include/asm/mach-ar7/irq.h
deleted file mode 100644
index 46bb730ea9..0000000000
--- a/arch/mips/include/asm/mach-ar7/irq.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Shamelessly copied from asm-mips/mach-emma2rh/
- * Copyright (C) 2003 by Ralf Baechle
- */
-#ifndef __ASM_AR7_IRQ_H
-#define __ASM_AR7_IRQ_H
-
-#define NR_IRQS 256
-
-#include <asm/mach-generic/irq.h>
-
-#endif /* __ASM_AR7_IRQ_H */
diff --git a/arch/mips/include/asm/mach-ar7/prom.h b/arch/mips/include/asm/mach-ar7/prom.h
deleted file mode 100644
index 9e1d20b06f..0000000000
--- a/arch/mips/include/asm/mach-ar7/prom.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (C) 2006, 2007 Florian Fainelli <florian@openwrt.org>
- */
-
-#ifndef __PROM_H__
-#define __PROM_H__
-
-extern char *prom_getenv(const char *name);
-extern void prom_meminit(void);
-
-#endif /* __PROM_H__ */
diff --git a/arch/mips/include/asm/mach-ar7/spaces.h b/arch/mips/include/asm/mach-ar7/spaces.h
deleted file mode 100644
index a004d94dfb..0000000000
--- a/arch/mips/include/asm/mach-ar7/spaces.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
- * Copyright (C) 2000, 2002  Maciej W. Rozycki
- * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
- */
-#ifndef _ASM_AR7_SPACES_H
-#define _ASM_AR7_SPACES_H
-
-/*
- * This handles the memory map.
- * We handle pages at KSEG0 for kernels with 32 bit address space.
- */
-#define PAGE_OFFSET	_AC(0x94000000, UL)
-#define PHYS_OFFSET	_AC(0x14000000, UL)
-
-#include <asm/mach-generic/spaces.h>
-
-#endif /* __ASM_AR7_SPACES_H */
diff --git a/arch/mips/include/asm/mach-loongson32/dma.h b/arch/mips/include/asm/mach-loongson32/dma.h
deleted file mode 100644
index e917b3ccb2..0000000000
--- a/arch/mips/include/asm/mach-loongson32/dma.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (c) 2015 Zhang, Keguang <keguang.zhang@gmail.com>
- *
- * Loongson 1 NAND platform support.
- */
-
-#ifndef __ASM_MACH_LOONGSON32_DMA_H
-#define __ASM_MACH_LOONGSON32_DMA_H
-
-#define LS1X_DMA_CHANNEL0	0
-#define LS1X_DMA_CHANNEL1	1
-#define LS1X_DMA_CHANNEL2	2
-
-struct plat_ls1x_dma {
-	int nr_channels;
-};
-
-extern struct plat_ls1x_dma ls1b_dma_pdata;
-
-#endif /* __ASM_MACH_LOONGSON32_DMA_H */
diff --git a/arch/mips/include/asm/mach-loongson32/nand.h b/arch/mips/include/asm/mach-loongson32/nand.h
deleted file mode 100644
index aaf5ed19d7..0000000000
--- a/arch/mips/include/asm/mach-loongson32/nand.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (c) 2015 Zhang, Keguang <keguang.zhang@gmail.com>
- *
- * Loongson 1 NAND platform support.
- */
-
-#ifndef __ASM_MACH_LOONGSON32_NAND_H
-#define __ASM_MACH_LOONGSON32_NAND_H
-
-#include <linux/dmaengine.h>
-#include <linux/mtd/partitions.h>
-
-struct plat_ls1x_nand {
-	struct mtd_partition *parts;
-	unsigned int nr_parts;
-
-	int hold_cycle;
-	int wait_cycle;
-};
-
-extern struct plat_ls1x_nand ls1b_nand_pdata;
-
-bool ls1x_dma_filter_fn(struct dma_chan *chan, void *param);
-
-#endif /* __ASM_MACH_LOONGSON32_NAND_H */
diff --git a/arch/mips/include/asm/mach-loongson32/platform.h b/arch/mips/include/asm/mach-loongson32/platform.h
index 2cdcfb5f60..f74292b13b 100644
--- a/arch/mips/include/asm/mach-loongson32/platform.h
+++ b/arch/mips/include/asm/mach-loongson32/platform.h
@@ -8,9 +8,6 @@
 
 #include <linux/platform_device.h>
 
-#include <dma.h>
-#include <nand.h>
-
 extern struct platform_device ls1x_uart_pdev;
 extern struct platform_device ls1x_eth0_pdev;
 extern struct platform_device ls1x_eth1_pdev;
diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h
index 40e40a7eb9..f4440edcd8 100644
--- a/arch/mips/include/asm/pgalloc.h
+++ b/arch/mips/include/asm/pgalloc.h
@@ -95,6 +95,7 @@ static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
 
 	if (!ptdesc)
 		return NULL;
+	pagetable_pud_ctor(ptdesc);
 	pud = ptdesc_address(ptdesc);
 
 	pud_init(pud);
diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h
index daf3cf244e..701a233583 100644
--- a/arch/mips/include/asm/ptrace.h
+++ b/arch/mips/include/asm/ptrace.h
@@ -154,6 +154,8 @@ static inline long regs_return_value(struct pt_regs *regs)
 }
 
 #define instruction_pointer(regs) ((regs)->cp0_epc)
+extern unsigned long exception_ip(struct pt_regs *regs);
+#define exception_ip(regs) exception_ip(regs)
 #define profile_pc(regs) instruction_pointer(regs)
 
 extern asmlinkage long syscall_trace_enter(struct pt_regs *regs, long syscall);
diff --git a/arch/mips/include/asm/smp-ops.h b/arch/mips/include/asm/smp-ops.h
index 5719ff49ef..0c59e168f8 100644
--- a/arch/mips/include/asm/smp-ops.h
+++ b/arch/mips/include/asm/smp-ops.h
@@ -35,7 +35,7 @@ struct plat_smp_ops {
 	void (*cpu_die)(unsigned int cpu);
 	void (*cleanup_dead_cpu)(unsigned cpu);
 #endif
-#ifdef CONFIG_KEXEC
+#ifdef CONFIG_KEXEC_CORE
 	void (*kexec_nonboot_cpu)(void);
 #endif
 };
diff --git a/arch/mips/include/asm/smp.h b/arch/mips/include/asm/smp.h
index a40d8c0e4b..901bc61fa7 100644
--- a/arch/mips/include/asm/smp.h
+++ b/arch/mips/include/asm/smp.h
@@ -93,7 +93,7 @@ static inline void __cpu_die(unsigned int cpu)
 extern void __noreturn play_dead(void);
 #endif
 
-#ifdef CONFIG_KEXEC
+#ifdef CONFIG_KEXEC_CORE
 static inline void kexec_nonboot_cpu(void)
 {
 	extern const struct plat_smp_ops *mp_ops;	/* private */