[PATCH 10/11] x86/mm: Remove pgd_list leftovers

Ingo Molnar
2015-09-22T06:24:44Z

Nothing uses the pgd_list anymore - remove the list itself and its helpers.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <Waiman.Long@hp.com>
Cc: linux-mm@kvack.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/include/asm/pgtable.h | 3 ---
arch/x86/mm/fault.c | 1 -
arch/x86/mm/pgtable.c | 26 --------------------------
3 files changed, 30 deletions(-)

diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 867da5bbb4a3..8338c8175409 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -29,9 +29,6 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))

extern spinlock_t pgd_lock;
-extern struct list_head pgd_list;
-
-extern struct mm_struct *pgd_page_get_mm(struct page *page);

#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 9322d5ad3811..546fbca9621d 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -189,7 +189,6 @@ force_sig_info_fault(int si_signo, int si_code, unsigned long address,
}

DEFINE_SPINLOCK(pgd_lock);
-LIST_HEAD(pgd_list);

#ifdef CONFIG_X86_32
static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 8a42d54f44ba..cb5b8cbcf96b 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -84,35 +84,9 @@ void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
#endif /* CONFIG_PGTABLE_LEVELS > 3 */
#endif /* CONFIG_PGTABLE_LEVELS > 2 */

-static inline void pgd_list_add(pgd_t *pgd)
-{
- struct page *page = virt_to_page(pgd);
-
- list_add(&page->lru, &pgd_list);
-}
-
-static inline void pgd_list_del(pgd_t *pgd)
-{
- struct page *page = virt_to_page(pgd);
-
- list_del(&page->lru);
-}
-
#define UNSHARED_PTRS_PER_PGD \
(SHARED_KERNEL_PMD ? KERNEL_PGD_BOUNDARY : PTRS_PER_PGD)

-
-static void pgd_set_mm(pgd_t *pgd, struct mm_struct *mm)
-{
- BUILD_BUG_ON(sizeof(virt_to_page(pgd)->index) < sizeof(mm));
- virt_to_page(pgd)->index = (pgoff_t)mm;
-}
-
-struct mm_struct *pgd_page_get_mm(struct page *page)
-{
- return (struct mm_struct *)page->index;
-}
-
static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd)
{
/* If the pgd points to a shared pagetable level (either the
--
2.1.4