Release 4.11 arch/x86/mm/ident_map.c
/*
* Helper routines for building identity mapping page tables. This is
* included by both the compressed kernel and the regular kernel.
*/
static void ident_pmd_init(struct x86_mapping_info *info, pmd_t *pmd_page,
unsigned long addr, unsigned long end)
{
addr &= PMD_MASK;
for (; addr < end; addr += PMD_SIZE) {
pmd_t *pmd = pmd_page + pmd_index(addr);
if (pmd_present(*pmd))
continue;
set_pmd(pmd, __pmd((addr - info->offset) | info->pmd_flag));
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Yinghai Lu | 67 | 83.75% | 1 | 50.00% |
| Rafael J. Wysocki | 13 | 16.25% | 1 | 50.00% |
| Total | 80 | 100.00% | 2 | 100.00% |
static int ident_pud_init(struct x86_mapping_info *info, pud_t *pud_page,
unsigned long addr, unsigned long end)
{
unsigned long next;
for (; addr < end; addr = next) {
pud_t *pud = pud_page + pud_index(addr);
pmd_t *pmd;
next = (addr & PUD_MASK) + PUD_SIZE;
if (next > end)
next = end;
if (pud_present(*pud)) {
pmd = pmd_offset(pud, 0);
ident_pmd_init(info, pmd, addr, next);
continue;
}
pmd = (pmd_t *)info->alloc_pgt_page(info->context);
if (!pmd)
return -ENOMEM;
ident_pmd_init(info, pmd, addr, next);
set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE));
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Yinghai Lu | 159 | 100.00% | 1 | 100.00% |
| Total | 159 | 100.00% | 1 | 100.00% |
int kernel_ident_mapping_init(struct x86_mapping_info *info, pgd_t *pgd_page,
unsigned long pstart, unsigned long pend)
{
unsigned long addr = pstart + info->offset;
unsigned long end = pend + info->offset;
unsigned long next;
int result;
for (; addr < end; addr = next) {
pgd_t *pgd = pgd_page + pgd_index(addr);
pud_t *pud;
next = (addr & PGDIR_MASK) + PGDIR_SIZE;
if (next > end)
next = end;
if (pgd_present(*pgd)) {
pud = pud_offset(pgd, 0);
result = ident_pud_init(info, pud, addr, next);
if (result)
return result;
continue;
}
pud = (pud_t *)info->alloc_pgt_page(info->context);
if (!pud)
return -ENOMEM;
result = ident_pud_init(info, pud, addr, next);
if (result)
return result;
set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE));
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Yinghai Lu | 177 | 88.94% | 1 | 50.00% |
| Rafael J. Wysocki | 22 | 11.06% | 1 | 50.00% |
| Total | 199 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Yinghai Lu | 403 | 91.80% | 1 | 33.33% |
| Rafael J. Wysocki | 35 | 7.97% | 1 | 33.33% |
| Kees Cook | 1 | 0.23% | 1 | 33.33% |
| Total | 439 | 100.00% | 3 | 100.00% |
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