The patch titled
Subject: mm/debug_vm_pgtable: remove unused code
has been added to the -mm tree. Its filename is
mm-debug_vm_pgtable-remove-unused-code.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-debug_vm_pgtable-remove-unused-code.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-debug_vm_pgtable-remove-unused-code.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Gavin Shan <gshan@xxxxxxxxxx>
Subject: mm/debug_vm_pgtable: remove unused code
The variables used by old implementation isn't needed as we switched to
"struct pgtable_debug_args". Lets remove them and related code in
debug_vm_pgtable().
Link: https://lkml.kernel.org/r/20210809092631.1888748-12-gshan@xxxxxxxxxx
Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
Reviewed-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Tested-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx> [powerpc 8xx]
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Chunyu Hu <chuhu@xxxxxxxxxx>
Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxxxxx>
Cc: Qian Cai <cai@xxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/debug_vm_pgtable.c | 54 ----------------------------------------
1 file changed, 54 deletions(-)
--- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-remove-unused-code
+++ a/mm/debug_vm_pgtable.c
@@ -1189,14 +1189,6 @@ error:
static int __init debug_vm_pgtable(void)
{
struct pgtable_debug_args args;
- struct vm_area_struct *vma;
- struct mm_struct *mm;
- pgd_t *pgdp;
- p4d_t *p4dp;
- pud_t *pudp;
- pmd_t *pmdp, *saved_pmdp, pmd;
- pgtable_t saved_ptep;
- unsigned long vaddr;
spinlock_t *ptl = NULL;
int idx, ret;
@@ -1205,41 +1197,6 @@ static int __init debug_vm_pgtable(void)
if (ret)
return ret;
- vaddr = get_random_vaddr();
- mm = mm_alloc();
- if (!mm) {
- pr_err("mm_struct allocation failed\n");
- return 1;
- }
-
- vma = vm_area_alloc(mm);
- if (!vma) {
- pr_err("vma allocation failed\n");
- return 1;
- }
-
- pgdp = pgd_offset(mm, vaddr);
- p4dp = p4d_alloc(mm, pgdp, vaddr);
- pudp = pud_alloc(mm, p4dp, vaddr);
- pmdp = pmd_alloc(mm, pudp, vaddr);
- /*
- * Allocate pgtable_t
- */
- if (pte_alloc(mm, pmdp)) {
- pr_err("pgtable allocation failed\n");
- return 1;
- }
-
- /*
- * Save all the page table page addresses as the page table
- * entries will be used for testing with random or garbage
- * values. These saved addresses will be used for freeing
- * page table pages.
- */
- pmd = READ_ONCE(*pmdp);
- saved_pmdp = pmd_offset(pudp, 0UL);
- saved_ptep = pmd_pgtable(pmd);
-
/*
* Iterate over the protection_map[] to make sure that all
* the basic page table transformation validations just hold
@@ -1322,17 +1279,6 @@ static int __init debug_vm_pgtable(void)
pgd_populate_tests(&args);
spin_unlock(&(args.mm->page_table_lock));
- p4d_free(mm, p4d_offset(pgdp, 0UL));
- pud_free(mm, pud_offset(p4dp, 0UL));
- pmd_free(mm, saved_pmdp);
- pte_free(mm, saved_ptep);
-
- vm_area_free(vma);
- mm_dec_nr_puds(mm);
- mm_dec_nr_pmds(mm);
- mm_dec_nr_ptes(mm);
- mmdrop(mm);
-
destroy_args(&args);
return 0;
}
_
Patches currently in -mm which might be from gshan@xxxxxxxxxx are
mm-debug_vm_pgtable-introduce-struct-pgtable_debug_args.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-basic-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-leaf-and-savewrite-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-protnone-and-devmap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-soft_dirty-and-swap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-migration-and-thp-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pte-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pmd-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pgd-and-p4d-modifying-tests.patch
mm-debug_vm_pgtable-remove-unused-code.patch
mm-debug_vm_pgtable-fix-corrupted-page-flag.patch
