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x86/mm: Convert sync_global_pgds_l4() to ptdescs

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Convert sync_global_pgds_l4() to ptdescs in preparation for the
eventual splitting of ptdescs from struct page.

Signed-off-by: Vishal Moola <vishal.moola@gmail.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: William Kucharski <william.kucharski@linux.dev>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Link: https://patch.msgid.link/20260629185742.126987-7-vishal.moola@gmail.com
This commit is contained in:
Vishal Moola 2026-06-29 11:57:39 -07:00 committed by Dave Hansen
parent 90c881895f
commit 9c453f8784
1 changed files with 4 additions and 4 deletions
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8
arch/x86/mm/init_64.c
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@ -174,7 +174,7 @@ static void sync_global_pgds_l4(unsigned long start, unsigned long end)
for (addr = start; addr <= end; addr = ALIGN(addr + 1, PGDIR_SIZE)) {
pgd_t *pgd_ref = pgd_offset_k(addr);
const p4d_t *p4d_ref;
struct page *page;
struct ptdesc *ptdesc;
/*
* With folded p4d, pgd_none() is always false, we need to
@ -187,15 +187,15 @@ static void sync_global_pgds_l4(unsigned long start, unsigned long end)
continue;
spin_lock(&pgd_lock);
list_for_each_entry(page, &pgd_list, lru) {
list_for_each_entry(ptdesc, &pgd_list, pt_list) {
pgd_t *pgd;
p4d_t *p4d;
spinlock_t *pgt_lock;
pgd = (pgd_t *)page_address(page) + pgd_index(addr);
pgd = (pgd_t *)ptdesc_address(ptdesc) + pgd_index(addr);
p4d = p4d_offset(pgd, addr);
/* the pgt_lock only for Xen */
pgt_lock = &pgd_page_get_mm(page)->page_table_lock;
pgt_lock = &pgd_page_get_mm(ptdesc_page(ptdesc))->page_table_lock;
spin_lock(pgt_lock);
if (!p4d_none(*p4d_ref) && !p4d_none(*p4d))