diff --git a/arch/alpha/include/asm/pgtable.h b/arch/alpha/include/asm/pgtable.h index 3ea9661c09ffc10c969ea4059fd8ff4a27dd71fe..9e45f6735d5d2cacf678fb9c83ba8dbf04de20e5 100644 --- a/arch/alpha/include/asm/pgtable.h +++ b/arch/alpha/include/asm/pgtable.h @@ -313,8 +313,6 @@ extern inline pte_t mk_swap_pte(unsigned long type, unsigned long offset) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) -#define kern_addr_valid(addr) (1) - #define pte_ERROR(e) \ printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e)) #define pmd_ERROR(e) \ diff --git a/arch/arc/include/asm/pgtable-bits-arcv2.h b/arch/arc/include/asm/pgtable-bits-arcv2.h index b23be557403e3dfefbfe77c72ef445fa5b9a1584..515e82db519fe332bfefd08646f6757f5c4b24d4 100644 --- a/arch/arc/include/asm/pgtable-bits-arcv2.h +++ b/arch/arc/include/asm/pgtable-bits-arcv2.h @@ -120,8 +120,6 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) -#define kern_addr_valid(addr) (1) - #ifdef CONFIG_TRANSPARENT_HUGEPAGE #include #endif diff --git a/arch/arm/include/asm/pgtable-nommu.h b/arch/arm/include/asm/pgtable-nommu.h index d16aba48fa0a411d7ee851ba8ded85fe383d8e5c..25d8c7bb07e0cf9efffa120bad74329494329551 100644 --- a/arch/arm/include/asm/pgtable-nommu.h +++ b/arch/arm/include/asm/pgtable-nommu.h @@ -21,8 +21,6 @@ #define pgd_none(pgd) (0) #define pgd_bad(pgd) (0) #define pgd_clear(pgdp) -#define kern_addr_valid(addr) (1) -/* FIXME */ /* * PMD_SHIFT determines the size of the area a second-level page table can map * PGDIR_SHIFT determines what a third-level page table entry can map diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index 78a532068fec2ccb083886afba64d665e8441206..00954ab1a0393ce25d414d76da5a39bb31f2f068 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h @@ -298,10 +298,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) */ #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS) -/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ -/* FIXME: this is not correct */ -#define kern_addr_valid(addr) (1) - /* * We provide our own arch_get_unmapped_area to cope with VIPT caches. */ diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 71a1af42f0e89775163c9d6428c22901b9a6f1e9..4873c1d6e7d0d73aa8a7c0a704548615a57855a7 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -1021,8 +1021,6 @@ static inline pmd_t pmdp_establish(struct vm_area_struct *vma, */ #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS) -extern int kern_addr_valid(unsigned long addr); - #ifdef CONFIG_ARM64_MTE #define __HAVE_ARCH_PREPARE_TO_SWAP diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 9a7c38965154081eebea1936146d349989a222cb..556154d821bf43de4f5343697155d8bc062c7722 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -814,53 +814,6 @@ void __init paging_init(void) create_idmap(); } -/* - * Check whether a kernel address is valid (derived from arch/x86/). - */ -int kern_addr_valid(unsigned long addr) -{ - pgd_t *pgdp; - p4d_t *p4dp; - pud_t *pudp, pud; - pmd_t *pmdp, pmd; - pte_t *ptep, pte; - - addr = arch_kasan_reset_tag(addr); - if ((((long)addr) >> VA_BITS) != -1UL) - return 0; - - pgdp = pgd_offset_k(addr); - if (pgd_none(READ_ONCE(*pgdp))) - return 0; - - p4dp = p4d_offset(pgdp, addr); - if (p4d_none(READ_ONCE(*p4dp))) - return 0; - - pudp = pud_offset(p4dp, addr); - pud = READ_ONCE(*pudp); - if (pud_none(pud)) - return 0; - - if (pud_sect(pud)) - return pfn_valid(pud_pfn(pud)); - - pmdp = pmd_offset(pudp, addr); - pmd = READ_ONCE(*pmdp); - if (pmd_none(pmd)) - return 0; - - if (pmd_sect(pmd)) - return pfn_valid(pmd_pfn(pmd)); - - ptep = pte_offset_kernel(pmdp, addr); - pte = READ_ONCE(*ptep); - if (pte_none(pte)) - return 0; - - return pfn_valid(pte_pfn(pte)); -} - #ifdef CONFIG_MEMORY_HOTPLUG static void free_hotplug_page_range(struct page *page, size_t size, struct vmem_altmap *altmap) diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c index d107c3d434e224552ae34011a4df3319cc977516..0a741a910a6abb909902ab21b5baf6b6995685bb 100644 --- a/arch/arm64/mm/pageattr.c +++ b/arch/arm64/mm/pageattr.c @@ -201,8 +201,7 @@ void __kernel_map_pages(struct page *page, int numpages, int enable) /* * This function is used to determine if a linear map page has been marked as - * not-valid. Walk the page table and check the PTE_VALID bit. This is based - * on kern_addr_valid(), which almost does what we need. + * not-valid. Walk the page table and check the PTE_VALID bit. * * Because this is only called on the kernel linear map, p?d_sect() implies * p?d_present(). When debug_pagealloc is enabled, sections mappings are diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h index c3d9b92cbe61c81d030eda9cfe1d968fe10d4050..77bc6caff2d23875e0474940db012ad0fb9d5738 100644 --- a/arch/csky/include/asm/pgtable.h +++ b/arch/csky/include/asm/pgtable.h @@ -249,9 +249,6 @@ extern void paging_init(void); void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *pte); -/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ -#define kern_addr_valid(addr) (1) - #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ remap_pfn_range(vma, vaddr, pfn, size, prot) diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/page.h index 7cbf719c578ec455fa3243d7193718dd2462f150..d7d4f9fca32795ef0d921c93c7bda4d4fe732e75 100644 --- a/arch/hexagon/include/asm/page.h +++ b/arch/hexagon/include/asm/page.h @@ -131,13 +131,6 @@ static inline void clear_page(void *page) #define page_to_virt(page) __va(page_to_phys(page)) -/* - * For port to Hexagon Virtual Machine, MAYBE we check for attempts - * to reference reserved HVM space, but in any case, the VM will be - * protected. - */ -#define kern_addr_valid(addr) (1) - #include #include /* XXX Todo: implement assembly-optimized version of getorder. */ diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h index 6925e28ae61d192ff6bfa102c9427daf5f78ce49..01517a5e677891b2a0fbaf0f454248c31ddc0f23 100644 --- a/arch/ia64/include/asm/pgtable.h +++ b/arch/ia64/include/asm/pgtable.h @@ -181,22 +181,6 @@ ia64_phys_addr_valid (unsigned long addr) return (addr & (local_cpu_data->unimpl_pa_mask)) == 0; } -/* - * kern_addr_valid(ADDR) tests if ADDR is pointing to valid kernel - * memory. For the return value to be meaningful, ADDR must be >= - * PAGE_OFFSET. This operation can be relatively expensive (e.g., - * require a hash-, or multi-level tree-lookup or something of that - * sort) but it guarantees to return TRUE only if accessing the page - * at that address does not cause an error. Note that there may be - * addresses for which kern_addr_valid() returns FALSE even though an - * access would not cause an error (e.g., this is typically true for - * memory mapped I/O regions. - * - * XXX Need to implement this for IA-64. - */ -#define kern_addr_valid(addr) (1) - - /* * Now come the defines and routines to manage and access the three-level * page table. diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h index 946704bee599ee843c9abc154355683550b1c6e0..fc70b7041b760ee71f33159a6e2365d41c71fb25 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -421,8 +421,6 @@ static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, __update_tlb(vma, address, (pte_t *)pmdp); } -#define kern_addr_valid(addr) (1) - static inline unsigned long pmd_pfn(pmd_t pmd) { return (pmd_val(pmd) & _PFN_MASK) >> _PFN_SHIFT; diff --git a/arch/m68k/include/asm/pgtable_mm.h b/arch/m68k/include/asm/pgtable_mm.h index 9b4e2fe2ac821671ee5615801cbe791fbee4a8f1..b93c41fe2067864e5f9f3656f28a4ec5fc1aef6f 100644 --- a/arch/m68k/include/asm/pgtable_mm.h +++ b/arch/m68k/include/asm/pgtable_mm.h @@ -145,8 +145,6 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, #endif /* !__ASSEMBLY__ */ -#define kern_addr_valid(addr) (1) - /* MMU-specific headers */ #ifdef CONFIG_SUN3 diff --git a/arch/m68k/include/asm/pgtable_no.h b/arch/m68k/include/asm/pgtable_no.h index bce5ca56c3883dea12147eff894e99b968d964fb..fed58da3a6b65c5adc216135b2f3a37bfaeb10b8 100644 --- a/arch/m68k/include/asm/pgtable_no.h +++ b/arch/m68k/include/asm/pgtable_no.h @@ -20,7 +20,6 @@ #define pgd_none(pgd) (0) #define pgd_bad(pgd) (0) #define pgd_clear(pgdp) -#define kern_addr_valid(addr) (1) #define pmd_offset(a, b) ((void *)0) #define PAGE_NONE __pgprot(0) diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h index ba348e997dbb4a26602b9277692523b9142c3ca5..42f5988e998b8f3be833a6d7db533860edef0cf5 100644 --- a/arch/microblaze/include/asm/pgtable.h +++ b/arch/microblaze/include/asm/pgtable.h @@ -416,9 +416,6 @@ extern unsigned long iopa(unsigned long addr); #define IOMAP_NOCACHE_NONSER 2 #define IOMAP_NO_COPYBACK 3 -/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ -#define kern_addr_valid(addr) (1) - void do_page_fault(struct pt_regs *regs, unsigned long address, unsigned long error_code); diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index 6caec386ad2f6861566588dc3a3b0a5570fe84a8..364a06033105cace5d0d3641b70dc668bfc7e122 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -550,8 +550,6 @@ static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, __update_tlb(vma, address, pte); } -#define kern_addr_valid(addr) (1) - /* * Allow physical addresses to be fixed up to help 36-bit peripherals. */ diff --git a/arch/nios2/include/asm/pgtable.h b/arch/nios2/include/asm/pgtable.h index b3d45e815295f8a833954efe381a7f565de14f53..ab793bc517f5cc8ff115f3659c28ce54d713333d 100644 --- a/arch/nios2/include/asm/pgtable.h +++ b/arch/nios2/include/asm/pgtable.h @@ -249,8 +249,6 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd) #define __swp_entry_to_pte(swp) ((pte_t) { (swp).val }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) -#define kern_addr_valid(addr) (1) - extern void __init paging_init(void); extern void __init mmu_init(void); diff --git a/arch/openrisc/include/asm/pgtable.h b/arch/openrisc/include/asm/pgtable.h index dcae8aea132fdc7d5d7853c7b3c083c9f2725928..6477c17b3062d83c88ddc7765a497d07f763ec07 100644 --- a/arch/openrisc/include/asm/pgtable.h +++ b/arch/openrisc/include/asm/pgtable.h @@ -395,8 +395,6 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) -#define kern_addr_valid(addr) (1) - typedef pte_t *pte_addr_t; #endif /* __ASSEMBLY__ */ diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h index ecd028854469856e0493e191e10b8738cf4fefed..bd09a44cfb2d4b81350a5c81db7492401e14e9ff 100644 --- a/arch/parisc/include/asm/pgtable.h +++ b/arch/parisc/include/asm/pgtable.h @@ -23,21 +23,6 @@ #include #include -/* - * kern_addr_valid(ADDR) tests if ADDR is pointing to valid kernel - * memory. For the return value to be meaningful, ADDR must be >= - * PAGE_OFFSET. This operation can be relatively expensive (e.g., - * require a hash-, or multi-level tree-lookup or something of that - * sort) but it guarantees to return TRUE only if accessing the page - * at that address does not cause an error. Note that there may be - * addresses for which kern_addr_valid() returns FALSE even though an - * access would not cause an error (e.g., this is typically true for - * memory mapped I/O regions. - * - * XXX Need to implement this for parisc. - */ -#define kern_addr_valid(addr) (1) - /* This is for the serialization of PxTLB broadcasts. At least on the N class * systems, only one PxTLB inter processor broadcast can be active at any one * time on the Merced bus. */ diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h index 283f40d05a4d7ee725a3d4bf4c77ee9482ca8feb..9972626ddaf68e3c5d8d2dbd36d8fa8ff7dfd6cd 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -81,13 +81,6 @@ void poking_init(void); extern unsigned long ioremap_bot; extern const pgprot_t protection_map[16]; -/* - * kern_addr_valid is intended to indicate whether an address is a valid - * kernel address. Most 32-bit archs define it as always true (like this) - * but most 64-bit archs actually perform a test. What should we do here? - */ -#define kern_addr_valid(addr) (1) - #ifndef CONFIG_TRANSPARENT_HUGEPAGE #define pmd_large(pmd) 0 #endif diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 7ec936910a96e12d1994ceb2719eb98a2b0820d3..c7993bdf749f1d40ee1c7fccb817d60cbd3f3bcc 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -801,8 +801,6 @@ static inline pmd_t pmdp_establish(struct vm_area_struct *vma, #endif /* !CONFIG_MMU */ -#define kern_addr_valid(addr) (1) /* FIXME */ - extern char _start[]; extern void *_dtb_early_va; extern uintptr_t _dtb_early_pa; diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index f1cb9391190db93f051602be1ac3834492fe5278..e1db072118186df58150e5300ca11b23efa39d30 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1773,8 +1773,6 @@ static inline swp_entry_t __swp_entry(unsigned long type, unsigned long offset) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) -#define kern_addr_valid(addr) (1) - extern int vmem_add_mapping(unsigned long start, unsigned long size); extern void vmem_remove_mapping(unsigned long start, unsigned long size); extern int __vmem_map_4k_page(unsigned long addr, unsigned long phys, pgprot_t prot, bool alloc); diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h index 6fb9ec54cf9b413ab7c1aa8a99a294f509eb161a..3ce30becf6dfa9a85f85e80a9a7cbd198816b70b 100644 --- a/arch/sh/include/asm/pgtable.h +++ b/arch/sh/include/asm/pgtable.h @@ -92,8 +92,6 @@ static inline unsigned long phys_addr_mask(void) typedef pte_t *pte_addr_t; -#define kern_addr_valid(addr) (1) - #define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT))) struct vm_area_struct; diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h index 8ff549004fac4920037fd7622b723c2062062a9b..5acc05b572e65f4dfe1f1c70a6f08649fd8f6b65 100644 --- a/arch/sparc/include/asm/pgtable_32.h +++ b/arch/sparc/include/asm/pgtable_32.h @@ -368,12 +368,6 @@ __get_iospace (unsigned long addr) } } -extern unsigned long *sparc_valid_addr_bitmap; - -/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ -#define kern_addr_valid(addr) \ - (test_bit(__pa((unsigned long)(addr))>>20, sparc_valid_addr_bitmap)) - /* * For sparc32&64, the pfn in io_remap_pfn_range() carries in * its high 4 bits. These macros/functions put it there or get it from there. diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c index d88e774c8eb49ea778b39c76d1631fdb02dea7e0..9c0ea457bdf05571e816ccb83e18a3321cd6ed03 100644 --- a/arch/sparc/mm/init_32.c +++ b/arch/sparc/mm/init_32.c @@ -37,8 +37,7 @@ #include "mm_32.h" -unsigned long *sparc_valid_addr_bitmap; -EXPORT_SYMBOL(sparc_valid_addr_bitmap); +static unsigned long *sparc_valid_addr_bitmap; unsigned long phys_base; EXPORT_SYMBOL(phys_base); diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index d6faee23c77dd04b8e4fd62d8541d52a7d36d3f7..04f9db0c31117936733dfe32d87438a78fcb818c 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -1667,7 +1667,6 @@ bool kern_addr_valid(unsigned long addr) return pfn_valid(pte_pfn(*pte)); } -EXPORT_SYMBOL(kern_addr_valid); static unsigned long __ref kernel_map_hugepud(unsigned long vstart, unsigned long vend, diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h index 66bc3f99d9bef1103fca18fb583c24b3145ced90..4e3052f2671a04c4b7f6d23c0812575942ffe67b 100644 --- a/arch/um/include/asm/pgtable.h +++ b/arch/um/include/asm/pgtable.h @@ -298,8 +298,6 @@ extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr); ((swp_entry_t) { pte_val(pte_mkuptodate(pte)) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) -#define kern_addr_valid(addr) (1) - /* Clear a kernel PTE and flush it from the TLB */ #define kpte_clear_flush(ptep, vaddr) \ do { \ diff --git a/arch/x86/include/asm/pgtable_32.h b/arch/x86/include/asm/pgtable_32.h index 7c9c968a42efedcbbf83b4d9050743710c96d82a..7d4ad8907297c37600c742cca0a2013f93268858 100644 --- a/arch/x86/include/asm/pgtable_32.h +++ b/arch/x86/include/asm/pgtable_32.h @@ -47,15 +47,6 @@ do { \ #endif /* !__ASSEMBLY__ */ -/* - * kern_addr_valid() is (1) for FLATMEM and (0) for SPARSEMEM - */ -#ifdef CONFIG_FLATMEM -#define kern_addr_valid(addr) (1) -#else -#define kern_addr_valid(kaddr) (0) -#endif - /* * This is used to calculate the .brk reservation for initial pagetables. * Enough space is reserved to allocate pagetables sufficient to cover all diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index e479491da8d5164497f6684a87d25246202f0f1e..7929327abe009112b59ed62436d28af4929e1424 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -240,7 +240,6 @@ static inline void native_pgd_clear(pgd_t *pgd) #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) #define __swp_entry_to_pmd(x) ((pmd_t) { .pmd = (x).val }) -extern int kern_addr_valid(unsigned long addr); extern void cleanup_highmap(void); #define HAVE_ARCH_UNMAPPED_AREA diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 3f040c6e5d13adec988114a570b52e600853d328..e8db4edd7cc9b39f96afad568285092d814039b8 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -1416,47 +1416,6 @@ void mark_rodata_ro(void) debug_checkwx(); } -int kern_addr_valid(unsigned long addr) -{ - unsigned long above = ((long)addr) >> __VIRTUAL_MASK_SHIFT; - pgd_t *pgd; - p4d_t *p4d; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - - if (above != 0 && above != -1UL) - return 0; - - pgd = pgd_offset_k(addr); - if (pgd_none(*pgd)) - return 0; - - p4d = p4d_offset(pgd, addr); - if (!p4d_present(*p4d)) - return 0; - - pud = pud_offset(p4d, addr); - if (!pud_present(*pud)) - return 0; - - if (pud_large(*pud)) - return pfn_valid(pud_pfn(*pud)); - - pmd = pmd_offset(pud, addr); - if (!pmd_present(*pmd)) - return 0; - - if (pmd_large(*pmd)) - return pfn_valid(pmd_pfn(*pmd)); - - pte = pte_offset_kernel(pmd, addr); - if (pte_none(*pte)) - return 0; - - return pfn_valid(pte_pfn(*pte)); -} - /* * Block size is the minimum amount of memory which can be hotplugged or * hotremoved. It must be power of two and must be equal or larger than diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h index 54f577c13afa1ecb9349332ed22a7d7ae471be63..5b5484d707b2e59bb69d0ca89c11645c7a90abf7 100644 --- a/arch/xtensa/include/asm/pgtable.h +++ b/arch/xtensa/include/asm/pgtable.h @@ -386,8 +386,6 @@ ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) #else -#define kern_addr_valid(addr) (1) - extern void update_mmu_cache(struct vm_area_struct * vma, unsigned long address, pte_t *ptep); diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index 98f3289556e4a1776e107720847333b8ec893936..71157ee35c1a226364531b5fc96832adb31b69e1 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -540,25 +540,17 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos) fallthrough; case KCORE_VMEMMAP: case KCORE_TEXT: - if (kern_addr_valid(start)) { - /* - * Using bounce buffer to bypass the - * hardened user copy kernel text checks. - */ - if (copy_from_kernel_nofault(buf, (void *)start, - tsz)) { - if (clear_user(buffer, tsz)) { - ret = -EFAULT; - goto out; - } - } else { - if (copy_to_user(buffer, buf, tsz)) { - ret = -EFAULT; - goto out; - } + /* + * Using bounce buffer to bypass the + * hardened user copy kernel text checks. + */ + if (copy_from_kernel_nofault(buf, (void *)start, tsz)) { + if (clear_user(buffer, tsz)) { + ret = -EFAULT; + goto out; } } else { - if (clear_user(buffer, tsz)) { + if (copy_to_user(buffer, buf, tsz)) { ret = -EFAULT; goto out; }