diff options
| author | Dave Hansen <dave.hansen@linux.intel.com> | 2025-10-22 16:26:31 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-11-16 17:28:17 -0800 |
| commit | 01894295672335ff304beed4359f30d14d5765f2 (patch) | |
| tree | 32abd8d85fd5a5e4e6714f60734194f51180e97c /include | |
| parent | 412d000346ea38ac4b9bb715a86c73ef89d90dea (diff) | |
mm: introduce pure page table freeing function
The pages used for ptdescs are currently freed back to the allocator in a
single location. They will shortly be freed from a second location.
Create a simple helper that just frees them back to the allocator.
Link: https://lkml.kernel.org/r/20251022082635.2462433-6-baolu.lu@linux.intel.com
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Betkov <bp@alien8.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robin Murohy <robin.murphy@arm.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Cc: Vasant Hegde <vasant.hegde@amd.com>
Cc: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Cc: Yi Lai <yi1.lai@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 8f46048875a7..88c0a0fae43a 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3046,6 +3046,13 @@ static inline struct ptdesc *pagetable_alloc_noprof(gfp_t gfp, unsigned int orde } #define pagetable_alloc(...) alloc_hooks(pagetable_alloc_noprof(__VA_ARGS__)) +static inline void __pagetable_free(struct ptdesc *pt) +{ + struct page *page = ptdesc_page(pt); + + __free_pages(page, compound_order(page)); +} + /** * pagetable_free - Free pagetables * @pt: The page table descriptor @@ -3055,12 +3062,10 @@ static inline struct ptdesc *pagetable_alloc_noprof(gfp_t gfp, unsigned int orde */ static inline void pagetable_free(struct ptdesc *pt) { - struct page *page = ptdesc_page(pt); - if (ptdesc_test_kernel(pt)) ptdesc_clear_kernel(pt); - __free_pages(page, compound_order(page)); + __pagetable_free(pt); } #if defined(CONFIG_SPLIT_PTE_PTLOCKS) |