Merge tag 'loongarch-fixes-6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

torvalds · torvalds · commit e927c520e1ba · 2025-11-12T18:21:30.000-08:00
Pull LoongArch fixes from Huacai Chen:

 - Fix a Rust build error

 - Fix exception/interrupt, memory management, perf event, hardware
   breakpoint, kexec and KVM bugs

* tag 'loongarch-fixes-6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  LoongArch: KVM: Fix max supported vCPUs set with EIOINTC
  LoongArch: KVM: Skip PMU checking on vCPU context switch
  LoongArch: KVM: Restore guest PMU if it is enabled
  LoongArch: KVM: Add delay until timer interrupt injected
  LoongArch: KVM: Set page with write attribute if dirty track disabled
  LoongArch: kexec: Print out debugging message if required
  LoongArch: kexec: Initialize the kexec_buf structure
  LoongArch: Use correct accessor to read FWPC/MWPC
  LoongArch: Refine the init_hw_perf_events() function
  LoongArch: Remove __GFP_HIGHMEM masking in pud_alloc_one()
  LoongArch: Let {pte,pmd}_modify() record the status of _PAGE_DIRTY
  LoongArch: Consolidate max_pfn &amp; max_low_pfn calculation
  LoongArch: Consolidate early_ioremap()/ioremap_prot()
  LoongArch: Use physical addresses for CSR_MERRENTRY/CSR_TLBRENTRY
  LoongArch: Clarify 3 MSG interrupt features
  rust: Add -fno-isolate-erroneous-paths-dereference to bindgen_skip_c_flags
diff --git a/arch/loongarch/include/asm/cpu-features.h b/arch/loongarch/include/asm/cpu-features.h
@@ -67,6 +67,8 @@
 #define cpu_has_hypervisor	cpu_opt(LOONGARCH_CPU_HYPERVISOR)
 #define cpu_has_ptw		cpu_opt(LOONGARCH_CPU_PTW)
 #define cpu_has_lspw		cpu_opt(LOONGARCH_CPU_LSPW)
+#define cpu_has_msgint		cpu_opt(LOONGARCH_CPU_MSGINT)
 #define cpu_has_avecint		cpu_opt(LOONGARCH_CPU_AVECINT)
+#define cpu_has_redirectint	cpu_opt(LOONGARCH_CPU_REDIRECTINT)
 
 #endif /* __ASM_CPU_FEATURES_H */
diff --git a/arch/loongarch/include/asm/cpu.h b/arch/loongarch/include/asm/cpu.h
@@ -101,7 +101,9 @@ enum cpu_type_enum {
 #define CPU_FEATURE_HYPERVISOR		26	/* CPU has hypervisor (running in VM) */
 #define CPU_FEATURE_PTW			27	/* CPU has hardware page table walker */
 #define CPU_FEATURE_LSPW		28	/* CPU has LSPW (lddir/ldpte instructions) */
-#define CPU_FEATURE_AVECINT		29	/* CPU has AVEC interrupt */
+#define CPU_FEATURE_MSGINT		29	/* CPU has MSG interrupt */
+#define CPU_FEATURE_AVECINT		30	/* CPU has AVEC interrupt */
+#define CPU_FEATURE_REDIRECTINT		31	/* CPU has interrupt remapping */
 
 #define LOONGARCH_CPU_CPUCFG		BIT_ULL(CPU_FEATURE_CPUCFG)
 #define LOONGARCH_CPU_LAM		BIT_ULL(CPU_FEATURE_LAM)
@@ -132,6 +134,8 @@ enum cpu_type_enum {
 #define LOONGARCH_CPU_HYPERVISOR	BIT_ULL(CPU_FEATURE_HYPERVISOR)
 #define LOONGARCH_CPU_PTW		BIT_ULL(CPU_FEATURE_PTW)
 #define LOONGARCH_CPU_LSPW		BIT_ULL(CPU_FEATURE_LSPW)
+#define LOONGARCH_CPU_MSGINT		BIT_ULL(CPU_FEATURE_MSGINT)
 #define LOONGARCH_CPU_AVECINT		BIT_ULL(CPU_FEATURE_AVECINT)
+#define LOONGARCH_CPU_REDIRECTINT	BIT_ULL(CPU_FEATURE_REDIRECTINT)
 
 #endif /* _ASM_CPU_H */
diff --git a/arch/loongarch/include/asm/hw_breakpoint.h b/arch/loongarch/include/asm/hw_breakpoint.h
@@ -134,13 +134,13 @@ static inline void hw_breakpoint_thread_switch(struct task_struct *next)
 /* Determine number of BRP registers available. */
 static inline int get_num_brps(void)
 {
-	return csr_read64(LOONGARCH_CSR_FWPC) & CSR_FWPC_NUM;
+	return csr_read32(LOONGARCH_CSR_FWPC) & CSR_FWPC_NUM;
 }
 
 /* Determine number of WRP registers available. */
 static inline int get_num_wrps(void)
 {
-	return csr_read64(LOONGARCH_CSR_MWPC) & CSR_MWPC_NUM;
+	return csr_read32(LOONGARCH_CSR_MWPC) & CSR_MWPC_NUM;
 }
 
 #endif	/* __KERNEL__ */
diff --git a/arch/loongarch/include/asm/io.h b/arch/loongarch/include/asm/io.h
@@ -14,7 +14,7 @@
 #include <asm/pgtable-bits.h>
 #include <asm/string.h>
 
-extern void __init __iomem *early_ioremap(u64 phys_addr, unsigned long size);
+extern void __init __iomem *early_ioremap(phys_addr_t phys_addr, unsigned long size);
 extern void __init early_iounmap(void __iomem *addr, unsigned long size);
 
 #define early_memremap early_ioremap
@@ -25,6 +25,9 @@ extern void __init early_iounmap(void __iomem *addr, unsigned long size);
 static inline void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size,
 					 pgprot_t prot)
 {
+	if (offset > TO_PHYS_MASK)
+		return NULL;
+
 	switch (pgprot_val(prot) & _CACHE_MASK) {
 	case _CACHE_CC:
 		return (void __iomem *)(unsigned long)(CACHE_BASE + offset);
diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
@@ -128,6 +128,7 @@
 #define  CPUCFG6_PMNUM			GENMASK(7, 4)
 #define  CPUCFG6_PMNUM_SHIFT		4
 #define  CPUCFG6_PMBITS			GENMASK(13, 8)
+#define  CPUCFG6_PMBITS_SHIFT		8
 #define  CPUCFG6_UPM			BIT(14)
 
 #define LOONGARCH_CPUCFG16		0x10
@@ -1137,6 +1138,7 @@
 #define  IOCSRF_FLATMODE		BIT_ULL(10)
 #define  IOCSRF_VM			BIT_ULL(11)
 #define  IOCSRF_AVEC			BIT_ULL(15)
+#define  IOCSRF_REDIRECT		BIT_ULL(16)
 
 #define LOONGARCH_IOCSR_VENDOR		0x10
 
diff --git a/arch/loongarch/include/asm/pgalloc.h b/arch/loongarch/include/asm/pgalloc.h
@@ -88,7 +88,7 @@ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
 {
 	pud_t *pud;
-	struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM, 0);
+	struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL, 0);
 
 	if (!ptdesc)
 		return NULL;
diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h
@@ -424,6 +424,9 @@ static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a)
 
 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 {
+	if (pte_val(pte) & _PAGE_DIRTY)
+		pte_val(pte) |= _PAGE_MODIFIED;
+
 	return __pte((pte_val(pte) & _PAGE_CHG_MASK) |
 		     (pgprot_val(newprot) & ~_PAGE_CHG_MASK));
 }
@@ -547,9 +550,11 @@ static inline struct page *pmd_page(pmd_t pmd)
 
 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
 {
-	pmd_val(pmd) = (pmd_val(pmd) & _HPAGE_CHG_MASK) |
-				(pgprot_val(newprot) & ~_HPAGE_CHG_MASK);
-	return pmd;
+	if (pmd_val(pmd) & _PAGE_DIRTY)
+		pmd_val(pmd) |= _PAGE_MODIFIED;
+
+	return __pmd((pmd_val(pmd) & _HPAGE_CHG_MASK) |
+		     (pgprot_val(newprot) & ~_HPAGE_CHG_MASK));
 }
 
 static inline pmd_t pmd_mkinvalid(pmd_t pmd)
diff --git a/arch/loongarch/kernel/cpu-probe.c b/arch/loongarch/kernel/cpu-probe.c
@@ -157,6 +157,8 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c)
 		c->options |= LOONGARCH_CPU_TLB;
 	if (config & CPUCFG1_IOCSR)
 		c->options |= LOONGARCH_CPU_IOCSR;
+	if (config & CPUCFG1_MSGINT)
+		c->options |= LOONGARCH_CPU_MSGINT;
 	if (config & CPUCFG1_UAL) {
 		c->options |= LOONGARCH_CPU_UAL;
 		elf_hwcap |= HWCAP_LOONGARCH_UAL;
@@ -331,6 +333,8 @@ static inline void cpu_probe_loongson(struct cpuinfo_loongarch *c, unsigned int
 		c->options |= LOONGARCH_CPU_EIODECODE;
 	if (config & IOCSRF_AVEC)
 		c->options |= LOONGARCH_CPU_AVECINT;
+	if (config & IOCSRF_REDIRECT)
+		c->options |= LOONGARCH_CPU_REDIRECTINT;
 	if (config & IOCSRF_VM)
 		c->options |= LOONGARCH_CPU_HYPERVISOR;
 }
diff --git a/arch/loongarch/kernel/kexec_efi.c b/arch/loongarch/kernel/kexec_efi.c
@@ -42,7 +42,7 @@ static void *efi_kexec_load(struct kimage *image,
 {
 	int ret;
 	unsigned long text_offset, kernel_segment_number;
-	struct kexec_buf kbuf;
+	struct kexec_buf kbuf = {};
 	struct kexec_segment *kernel_segment;
 	struct loongarch_image_header *h;
 
diff --git a/arch/loongarch/kernel/kexec_elf.c b/arch/loongarch/kernel/kexec_elf.c
@@ -59,7 +59,7 @@ static void *elf_kexec_load(struct kimage *image,
 	int ret;
 	unsigned long text_offset, kernel_segment_number;
 	struct elfhdr ehdr;
-	struct kexec_buf kbuf;
+	struct kexec_buf kbuf = {};
 	struct kexec_elf_info elf_info;
 	struct kexec_segment *kernel_segment;
 
diff --git a/arch/loongarch/kernel/machine_kexec.c b/arch/loongarch/kernel/machine_kexec.c
@@ -39,34 +39,12 @@ static unsigned long systable_ptr;
 static unsigned long start_addr;
 static unsigned long first_ind_entry;
 
-static void kexec_image_info(const struct kimage *kimage)
-{
-	unsigned long i;
-
-	pr_debug("kexec kimage info:\n");
-	pr_debug("\ttype:        %d\n", kimage->type);
-	pr_debug("\tstart:       %lx\n", kimage->start);
-	pr_debug("\thead:        %lx\n", kimage->head);
-	pr_debug("\tnr_segments: %lu\n", kimage->nr_segments);
-
-	for (i = 0; i < kimage->nr_segments; i++) {
-		pr_debug("\t    segment[%lu]: %016lx - %016lx", i,
-			kimage->segment[i].mem,
-			kimage->segment[i].mem + kimage->segment[i].memsz);
-		pr_debug("\t\t0x%lx bytes, %lu pages\n",
-			(unsigned long)kimage->segment[i].memsz,
-			(unsigned long)kimage->segment[i].memsz /  PAGE_SIZE);
-	}
-}
-
 int machine_kexec_prepare(struct kimage *kimage)
 {
 	int i;
 	char *bootloader = "kexec";
 	void *cmdline_ptr = (void *)KEXEC_CMDLINE_ADDR;
 
-	kexec_image_info(kimage);
-
 	kimage->arch.efi_boot = fw_arg0;
 	kimage->arch.systable_ptr = fw_arg2;
 
diff --git a/arch/loongarch/kernel/machine_kexec_file.c b/arch/loongarch/kernel/machine_kexec_file.c
@@ -143,7 +143,7 @@ int load_other_segments(struct kimage *image,
 	unsigned long initrd_load_addr = 0;
 	unsigned long orig_segments = image->nr_segments;
 	char *modified_cmdline = NULL;
-	struct kexec_buf kbuf;
+	struct kexec_buf kbuf = {};
 
 	kbuf.image = image;
 	/* Don't allocate anything below the kernel */
diff --git a/arch/loongarch/kernel/mem.c b/arch/loongarch/kernel/mem.c
@@ -13,15 +13,14 @@
 void __init memblock_init(void)
 {
 	u32 mem_type;
-	u64 mem_start, mem_end, mem_size;
+	u64 mem_start, mem_size;
 	efi_memory_desc_t *md;
 
 	/* Parse memory information */
 	for_each_efi_memory_desc(md) {
 		mem_type = md->type;
 		mem_start = md->phys_addr;
 		mem_size = md->num_pages << EFI_PAGE_SHIFT;
-		mem_end = mem_start + mem_size;
 
 		switch (mem_type) {
 		case EFI_LOADER_CODE:
@@ -31,8 +30,6 @@ void __init memblock_init(void)
 		case EFI_PERSISTENT_MEMORY:
 		case EFI_CONVENTIONAL_MEMORY:
 			memblock_add(mem_start, mem_size);
-			if (max_low_pfn < (mem_end >> PAGE_SHIFT))
-				max_low_pfn = mem_end >> PAGE_SHIFT;
 			break;
 		case EFI_PAL_CODE:
 		case EFI_UNUSABLE_MEMORY:
@@ -49,6 +46,8 @@ void __init memblock_init(void)
 		}
 	}
 
+	max_pfn = PFN_DOWN(memblock_end_of_DRAM());
+	max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn);
 	memblock_set_current_limit(PFN_PHYS(max_low_pfn));
 
 	/* Reserve the first 2MB */
diff --git a/arch/loongarch/kernel/numa.c b/arch/loongarch/kernel/numa.c
@@ -272,7 +272,8 @@ int __init init_numa_memory(void)
 		node_mem_init(node);
 		node_set_online(node);
 	}
-	max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());
+	max_pfn = PFN_DOWN(memblock_end_of_DRAM());
+	max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn);
 
 	setup_nr_node_ids();
 	loongson_sysconf.nr_nodes = nr_node_ids;
@@ -283,26 +284,6 @@ int __init init_numa_memory(void)
 
 #endif
 
-void __init paging_init(void)
-{
-	unsigned int node;
-	unsigned long zones_size[MAX_NR_ZONES] = {0, };
-
-	for_each_online_node(node) {
-		unsigned long start_pfn, end_pfn;
-
-		get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
-
-		if (end_pfn > max_low_pfn)
-			max_low_pfn = end_pfn;
-	}
-#ifdef CONFIG_ZONE_DMA32
-	zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
-#endif
-	zones_size[ZONE_NORMAL] = max_low_pfn;
-	free_area_init(zones_size);
-}
-
 int pcibus_to_node(struct pci_bus *bus)
 {
 	return dev_to_node(&bus->dev);
diff --git a/arch/loongarch/kernel/perf_event.c b/arch/loongarch/kernel/perf_event.c
@@ -845,13 +845,14 @@ static const struct loongarch_perf_event *loongarch_pmu_map_raw_event(u64 config
 
 static int __init init_hw_perf_events(void)
 {
-	int counters;
+	int bits, counters;
 
 	if (!cpu_has_pmp)
 		return -ENODEV;
 
 	pr_info("Performance counters: ");
-	counters = ((read_cpucfg(LOONGARCH_CPUCFG6) & CPUCFG6_PMNUM) >> 4) + 1;
+	bits = ((read_cpucfg(LOONGARCH_CPUCFG6) & CPUCFG6_PMBITS) >> CPUCFG6_PMBITS_SHIFT) + 1;
+	counters = ((read_cpucfg(LOONGARCH_CPUCFG6) & CPUCFG6_PMNUM) >> CPUCFG6_PMNUM_SHIFT) + 1;
 
 	loongarch_pmu.num_counters = counters;
 	loongarch_pmu.max_period = (1ULL << 63) - 1;
@@ -867,7 +868,7 @@ static int __init init_hw_perf_events(void)
 	on_each_cpu(reset_counters, NULL, 1);
 
 	pr_cont("%s PMU enabled, %d %d-bit counters available to each CPU.\n",
-			loongarch_pmu.name, counters, 64);
+			loongarch_pmu.name, counters, bits);
 
 	perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
 
diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c
@@ -294,8 +294,6 @@ static void __init fdt_setup(void)
 
 	early_init_dt_scan(fdt_pointer, __pa(fdt_pointer));
 	early_init_fdt_reserve_self();
-
-	max_low_pfn = PFN_PHYS(memblock_end_of_DRAM());
 #endif
 }
 
@@ -390,7 +388,8 @@ static void __init check_kernel_sections_mem(void)
 static void __init arch_mem_init(char **cmdline_p)
 {
 	/* Recalculate max_low_pfn for "mem=xxx" */
-	max_pfn = max_low_pfn = PHYS_PFN(memblock_end_of_DRAM());
+	max_pfn = PFN_DOWN(memblock_end_of_DRAM());
+	max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn);
 
 	if (usermem)
 		pr_info("User-defined physical RAM map overwrite\n");
diff --git a/arch/loongarch/kernel/traps.c b/arch/loongarch/kernel/traps.c
@@ -1131,8 +1131,8 @@ static void configure_exception_vector(void)
 	tlbrentry = (unsigned long)exception_handlers + 80*VECSIZE;
 
 	csr_write64(eentry, LOONGARCH_CSR_EENTRY);
-	csr_write64(eentry, LOONGARCH_CSR_MERRENTRY);
-	csr_write64(tlbrentry, LOONGARCH_CSR_TLBRENTRY);
+	csr_write64(__pa(eentry), LOONGARCH_CSR_MERRENTRY);
+	csr_write64(__pa(tlbrentry), LOONGARCH_CSR_TLBRENTRY);
 }
 
 void per_cpu_trap_init(int cpu)
diff --git a/arch/loongarch/kvm/intc/eiointc.c b/arch/loongarch/kvm/intc/eiointc.c
@@ -439,7 +439,7 @@ static int kvm_eiointc_ctrl_access(struct kvm_device *dev,
 	spin_lock_irqsave(&s->lock, flags);
 	switch (type) {
 	case KVM_DEV_LOONGARCH_EXTIOI_CTRL_INIT_NUM_CPU:
-		if (val >= EIOINTC_ROUTE_MAX_VCPUS)
+		if (val > EIOINTC_ROUTE_MAX_VCPUS)
 			ret = -EINVAL;
 		else
 			s->num_cpu = val;
diff --git a/arch/loongarch/kvm/mmu.c b/arch/loongarch/kvm/mmu.c
@@ -857,7 +857,7 @@ static int kvm_map_page(struct kvm_vcpu *vcpu, unsigned long gpa, bool write)
 
 	if (writeable) {
 		prot_bits = kvm_pte_mkwriteable(prot_bits);
-		if (write)
+		if (write || !kvm_slot_dirty_track_enabled(memslot))
 			prot_bits = kvm_pte_mkdirty(prot_bits);
 	}
 
diff --git a/arch/loongarch/kvm/timer.c b/arch/loongarch/kvm/timer.c
@@ -4,6 +4,7 @@
  */
 
 #include <linux/kvm_host.h>
+#include <asm/delay.h>
 #include <asm/kvm_csr.h>
 #include <asm/kvm_vcpu.h>
 
@@ -95,6 +96,7 @@ void kvm_restore_timer(struct kvm_vcpu *vcpu)
 		 * and set CSR TVAL with -1
 		 */
 		write_gcsr_timertick(0);
+		__delay(2); /* Wait cycles until timer interrupt injected */
 
 		/*
 		 * Writing CSR_TINTCLR_TI to LOONGARCH_CSR_TINTCLR will clear
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
diff --git a/arch/loongarch/mm/init.c b/arch/loongarch/mm/init.c
diff --git a/arch/loongarch/mm/ioremap.c b/arch/loongarch/mm/ioremap.c
diff --git a/rust/Makefile b/rust/Makefile

Original file line number	Diff line number	Diff line change
`@@ -134,13 +134,13 @@ static inline void hw_breakpoint_thread_switch(struct task_struct *next)`
`134`	`134`	`/* Determine number of BRP registers available. */`
`135`	`135`	`static inline int get_num_brps(void)`
`136`	`136`	`{`
`137`		`- return csr_read64(LOONGARCH_CSR_FWPC) & CSR_FWPC_NUM;`
	`137`	`+ return csr_read32(LOONGARCH_CSR_FWPC) & CSR_FWPC_NUM;`
`138`	`138`	`}`
`139`	`139`
`140`	`140`	`/* Determine number of WRP registers available. */`
`141`	`141`	`static inline int get_num_wrps(void)`
`142`	`142`	`{`
`143`		`- return csr_read64(LOONGARCH_CSR_MWPC) & CSR_MWPC_NUM;`
	`143`	`+ return csr_read32(LOONGARCH_CSR_MWPC) & CSR_MWPC_NUM;`
`144`	`144`	`}`
`145`	`145`
`146`	`146`	`#endif /* __KERNEL__ */`
Original file line number	Diff line number	Diff line change
`@@ -88,7 +88,7 @@ static inline pmd_t pmd_alloc_one(struct mm_struct mm, unsigned long address)`
`88`	`88`	`static inline pud_t pud_alloc_one(struct mm_struct mm, unsigned long address)`
`89`	`89`	`{`
`90`	`90`	`pud_t *pud;`
`91`		`- struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM, 0);`
	`91`	`+ struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL, 0);`
`92`	`92`
`93`	`93`	`if (!ptdesc)`
`94`	`94`	`return NULL;`
Original file line number	Diff line number	Diff line change
`@@ -424,6 +424,9 @@ static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a)`
`424`	`424`
`425`	`425`	`static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)`
`426`	`426`	`{`
	`427`	`+ if (pte_val(pte) & _PAGE_DIRTY)`
	`428`	`+ pte_val(pte) \|= _PAGE_MODIFIED;`
	`429`	`+`
`427`	`430`	`return __pte((pte_val(pte) & _PAGE_CHG_MASK) \|`
`428`	`431`	`(pgprot_val(newprot) & ~_PAGE_CHG_MASK));`
`429`	`432`	`}`
`@@ -547,9 +550,11 @@ static inline struct page *pmd_page(pmd_t pmd)`
`547`	`550`
`548`	`551`	`static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)`
`549`	`552`	`{`
`550`		`- pmd_val(pmd) = (pmd_val(pmd) & _HPAGE_CHG_MASK) \|`
`551`		`- (pgprot_val(newprot) & ~_HPAGE_CHG_MASK);`
`552`		`- return pmd;`
	`553`	`+ if (pmd_val(pmd) & _PAGE_DIRTY)`
	`554`	`+ pmd_val(pmd) \|= _PAGE_MODIFIED;`
	`555`	`+`
	`556`	`+ return __pmd((pmd_val(pmd) & _HPAGE_CHG_MASK) \|`
	`557`	`+ (pgprot_val(newprot) & ~_HPAGE_CHG_MASK));`
`553`	`558`	`}`
`554`	`559`
`555`	`560`	`static inline pmd_t pmd_mkinvalid(pmd_t pmd)`
Original file line number	Diff line number	Diff line change
`@@ -42,7 +42,7 @@ static void efi_kexec_load(struct kimage image,`
`42`	`42`	`{`
`43`	`43`	`int ret;`
`44`	`44`	`unsigned long text_offset, kernel_segment_number;`
`45`		`- struct kexec_buf kbuf;`
	`45`	`+ struct kexec_buf kbuf = {};`
`46`	`46`	`struct kexec_segment *kernel_segment;`
`47`	`47`	`struct loongarch_image_header *h;`
`48`	`48`