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 /include | |
| parent | fs/dax: remove FS_DAX_LIMITED config option (diff) | |
| download | linux-d438d273417055241ebaaf1ba3be23459fc27cba.tar.gz linux-d438d273417055241ebaaf1ba3be23459fc27cba.zip | |
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 'include')
| -rw-r--r-- | include/linux/mm.h | 7 | ||||
| -rw-r--r-- | include/linux/pgtable.h | 19 |
2 files changed, 2 insertions, 24 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index fc365420dfa8..4d833f159988 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2704,13 +2704,6 @@ static inline pud_t pud_mkspecial(pud_t pud) } #endif /* CONFIG_ARCH_SUPPORTS_PUD_PFNMAP */ -#ifndef CONFIG_ARCH_HAS_PTE_DEVMAP -static inline int pte_devmap(pte_t pte) -{ - return 0; -} -#endif - extern pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl); static inline pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr, diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index ffcd966cf2d4..cf1515c163e2 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -1643,21 +1643,6 @@ static inline int pud_write(pud_t pud) } #endif /* pud_write */ -#if !defined(CONFIG_ARCH_HAS_PTE_DEVMAP) || !defined(CONFIG_TRANSPARENT_HUGEPAGE) -static inline int pmd_devmap(pmd_t pmd) -{ - return 0; -} -static inline int pud_devmap(pud_t pud) -{ - return 0; -} -static inline int pgd_devmap(pgd_t pgd) -{ - return 0; -} -#endif - #if !defined(CONFIG_TRANSPARENT_HUGEPAGE) || \ !defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) static inline int pud_trans_huge(pud_t pud) @@ -1912,8 +1897,8 @@ typedef unsigned int pgtbl_mod_mask; * - It should contain a huge PFN, which points to a huge page larger than * PAGE_SIZE of the platform. The PFN format isn't important here. * - * - It should cover all kinds of huge mappings (e.g., pXd_trans_huge(), - * pXd_devmap(), or hugetlb mappings). + * - It should cover all kinds of huge mappings (i.e. pXd_trans_huge() + * or hugetlb mappings). */ #ifndef pgd_leaf #define pgd_leaf(x) false |