Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
x86: cpa, micro-optimization
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
authored by Thomas Gleixner and committed by Ingo Molnar 7b610eec 87f7f8fe
+2
-4
arch/x86/mm/pageattr.c
+2
-4
arch/x86/mm/pageattr.c
···
237
if (!SHARED_KERNEL_PMD) {
238
struct page *page;
239
240
list_for_each_entry(page, &pgd_list, lru) {
241
pgd_t *pgd;
242
pud_t *pud;
···
352
353
static int split_large_page(pte_t *kpte, unsigned long address)
354
{
355
-
unsigned long flags, addr, pfn, pfninc = 1;
356
gfp_t gfp_flags = GFP_KERNEL;
357
unsigned int i, level;
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pte_t *pbase, *tmp;
···
375
if (tmp != kpte)
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goto out_unlock;
377
378
-
address = __pa(address);
379
-
addr = address & PMD_PAGE_MASK;
380
pbase = (pte_t *)page_address(base);
381
#ifdef CONFIG_X86_32
382
paravirt_alloc_pt(&init_mm, page_to_pfn(base));
···
385
if (level == PG_LEVEL_1G) {
386
pfninc = PMD_PAGE_SIZE >> PAGE_SHIFT;
387
pgprot_val(ref_prot) |= _PAGE_PSE;
388
-
addr &= PUD_PAGE_MASK;
389
}
390
#endif
391
···
237
if (!SHARED_KERNEL_PMD) {
238
struct page *page;
239
240
+
address = __pa(address);
241
list_for_each_entry(page, &pgd_list, lru) {
242
pgd_t *pgd;
243
pud_t *pud;
···
351
352
static int split_large_page(pte_t *kpte, unsigned long address)
353
{
354
+
unsigned long flags, pfn, pfninc = 1;
355
gfp_t gfp_flags = GFP_KERNEL;
356
unsigned int i, level;
357
pte_t *pbase, *tmp;
···
374
if (tmp != kpte)
375
goto out_unlock;
376
377
pbase = (pte_t *)page_address(base);
378
#ifdef CONFIG_X86_32
379
paravirt_alloc_pt(&init_mm, page_to_pfn(base));
···
386
if (level == PG_LEVEL_1G) {
387
pfninc = PMD_PAGE_SIZE >> PAGE_SHIFT;
388
pgprot_val(ref_prot) |= _PAGE_PSE;
389
}
390
#endif
391