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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>
This commit is contained in:
Gavin Shan 2021-09-02 14:52:51 -07:00 committed by Linus Torvalds
parent 2f87f8c39a
commit fda88cfda1
1 changed files with 0 additions and 54 deletions
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54
mm/debug_vm_pgtable.c
View File

@ -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;
}