The patch titled
Subject: mm-swap-fix-swp_pfn_bits-with-config_phys_addr_t_64bit-on-32bit-v2
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mm-swap-fix-swp_pfn_bits-with-config_phys_addr_t_64bit-on-32bit-v2.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-swap-fix-swp_pfn_bits-with-config_phys_addr_t_64bit-on-32bit-v2.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: mm-swap-fix-swp_pfn_bits-with-config_phys_addr_t_64bit-on-32bit-v2
Date: Tue, 6 Dec 2022 11:57:37 +0100
rely on sizeof(phys_addr_t) and min_t() instead
Link: https://lkml.kernel.org/r/20221206105737.69478-1-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Acked-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/include/linux/swapops.h~mm-swap-fix-swp_pfn_bits-with-config_phys_addr_t_64bit-on-32bit-v2
+++ a/include/linux/swapops.h
@@ -32,14 +32,14 @@
* store PFN, we only need SWP_PFN_BITS bits. Each of the pfn swap entries
* can use the extra bits to store other information besides PFN.
*/
-#if defined(MAX_PHYSMEM_BITS)
-#define SWP_PFN_BITS (MAX_PHYSMEM_BITS - PAGE_SHIFT)
-#elif !defined(CONFIG_64BIT) && defined(CONFIG_PHYS_ADDR_T_64BIT)
-#define SWP_PFN_BITS SWP_TYPE_SHIFT
-#else
-#define SWP_PFN_BITS (BITS_PER_LONG - PAGE_SHIFT)
-#endif /* defined(MAX_PHYSMEM_BITS) */
-#define SWP_PFN_MASK (BIT(SWP_PFN_BITS) - 1)
+#ifdef MAX_PHYSMEM_BITS
+#define SWP_PFN_BITS (MAX_PHYSMEM_BITS - PAGE_SHIFT)
+#else /* MAX_PHYSMEM_BITS */
+#define SWP_PFN_BITS min_t(phys_addr_t, \
+ sizeof(phys_addr_t) * 8 - PAGE_SHIFT, \
+ SWP_TYPE_SHIFT)
+#endif /* MAX_PHYSMEM_BITS */
+#define SWP_PFN_MASK (BIT(SWP_PFN_BITS) - 1)
/**
* Migration swap entry specific bitfield definitions. Layout:
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
mm-swap-fix-swp_pfn_bits-with-config_phys_addr_t_64bit-on-32bit.patch
mm-swap-fix-swp_pfn_bits-with-config_phys_addr_t_64bit-on-32bit-v2.patch
selftests-vm-add-ksm-unmerge-tests.patch
mm-pagewalk-dont-trigger-test_walk-in-walk_page_vma.patch
selftests-vm-add-test-to-measure-madv_unmergeable-performance.patch
mm-ksm-simplify-break_ksm-to-not-rely-on-vm_fault_write.patch
mm-remove-vm_fault_write.patch
mm-ksm-fix-ksm-cow-breaking-with-userfaultfd-wp-via-fault_flag_unshare.patch
mm-pagewalk-add-walk_page_range_vma.patch
mm-ksm-convert-break_ksm-to-use-walk_page_range_vma.patch
mm-gup-remove-foll_migration.patch
mm-gup_test-fix-pin_longterm_test_read-with-highmem.patch
selftests-vm-madv_populate-fix-missing-madv_populate_readwrite-definitions.patch
selftests-vm-cow-fix-compile-warning-on-32bit.patch
selftests-vm-ksm_functional_tests-fixes-for-32bit.patch
