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authorGavin Shan <gshan@redhat.com>2021-09-02 14:52:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-03 09:58:10 -0700
commitfda88cfda1ab666ee6c136eeb401b4ead7ecd066 (patch)
treec2bdda96959e22d87742ccb3d993d2bbcf318e94 /mm
parent2f87f8c39a91effbbfd88a4642bd245b9c2b7ad3 (diff)
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@redhat.com Signed-off-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu> [powerpc 8xx] Tested-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> [s390] Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chunyu Hu <chuhu@redhat.com> Cc: Qian Cai <cai@lca.pw> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/debug_vm_pgtable.c54
1 files changed, 0 insertions, 54 deletions
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index 9e932ae9f158..4409e30adcf6 100644
--- a/mm/debug_vm_pgtable.c
+++ b/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;
}