diff options
| author | Alistair Popple <apopple@nvidia.com> | 2025-06-19 18:58:03 +1000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-09 22:42:18 -0700 |
| commit | d438d273417055241ebaaf1ba3be23459fc27cba (patch) | |
| tree | a192770f41a7f38ccecdd3f69a0db07218816e6f /arch/arm64/include/asm/pgtable.h | |
| parent | 28dc88c39ecfe7de5033fa05cdd24fd1a9f8267d (diff) | |
mm: remove devmap related functions and page table bits
Now that DAX and all other reference counts to ZONE_DEVICE pages are
managed normally there is no need for the special devmap PTE/PMD/PUD page
table bits. So drop all references to these, freeing up a software
defined page table bit on architectures supporting it.
Link: https://lkml.kernel.org/r/6389398c32cc9daa3dfcaa9f79c7972525d310ce.1750323463.git-series.apopple@nvidia.com
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Acked-by: Will Deacon <will@kernel.org> # arm64
Acked-by: David Hildenbrand <david@redhat.com>
Suggested-by: Chunyan Zhang <zhang.lyra@gmail.com>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Cc: Balbir Singh <balbirs@nvidia.com>
Cc: Björn Töpel <bjorn@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Deepak Gupta <debug@rivosinc.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Inki Dae <m.szyprowski@samsung.com>
Cc: John Groves <john@groves.net>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/arm64/include/asm/pgtable.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index e511f909f63c..ba63c8736666 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -190,7 +190,6 @@ static inline pteval_t __phys_to_pte_val(phys_addr_t phys) #define pte_user(pte) (!!(pte_val(pte) & PTE_USER)) #define pte_user_exec(pte) (!(pte_val(pte) & PTE_UXN)) #define pte_cont(pte) (!!(pte_val(pte) & PTE_CONT)) -#define pte_devmap(pte) (!!(pte_val(pte) & PTE_DEVMAP)) #define pte_tagged(pte) ((pte_val(pte) & PTE_ATTRINDX_MASK) == \ PTE_ATTRINDX(MT_NORMAL_TAGGED)) @@ -372,11 +371,6 @@ static inline pmd_t pmd_mkcont(pmd_t pmd) return __pmd(pmd_val(pmd) | PMD_SECT_CONT); } -static inline pte_t pte_mkdevmap(pte_t pte) -{ - return set_pte_bit(pte, __pgprot(PTE_DEVMAP | PTE_SPECIAL)); -} - #ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP static inline int pte_uffd_wp(pte_t pte) { @@ -653,14 +647,6 @@ static inline pmd_t pmd_mkhuge(pmd_t pmd) return __pmd((pmd_val(pmd) & ~mask) | val); } -#ifdef CONFIG_TRANSPARENT_HUGEPAGE -#define pmd_devmap(pmd) pte_devmap(pmd_pte(pmd)) -#endif -static inline pmd_t pmd_mkdevmap(pmd_t pmd) -{ - return pte_pmd(set_pte_bit(pmd_pte(pmd), __pgprot(PTE_DEVMAP))); -} - #ifdef CONFIG_ARCH_SUPPORTS_PMD_PFNMAP #define pmd_special(pte) (!!((pmd_val(pte) & PTE_SPECIAL))) static inline pmd_t pmd_mkspecial(pmd_t pmd) @@ -1302,16 +1288,6 @@ static inline int pmdp_set_access_flags(struct vm_area_struct *vma, return __ptep_set_access_flags(vma, address, (pte_t *)pmdp, pmd_pte(entry), dirty); } - -static inline int pud_devmap(pud_t pud) -{ - return 0; -} - -static inline int pgd_devmap(pgd_t pgd) -{ - return 0; -} #endif #ifdef CONFIG_PAGE_TABLE_CHECK |