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Groups > linux.kernel > #1229919

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

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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

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Thread

[PATCH 00/11] x86/mm: Implement lockless pgd_alloc()/pgd_free() Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200
  [PATCH 07/11] x86/mm: Remove pgd_list use from vmalloc_sync_all() Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200
    Re: [PATCH 07/11] x86/mm: Remove pgd_list use from vmalloc_sync_all() Linus Torvalds <torvalds@linux-foundation.org> - 2015-09-22 20:00 +0200
  [PATCH 06/11] x86/virt/guest/xen: Remove use of pgd_list from the Xen guest code Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200
    Re: [PATCH 06/11] x86/virt/guest/xen: Remove use of pgd_list from the  Xen guest code Linus Torvalds <torvalds@linux-foundation.org> - 2015-09-22 20:00 +0200
      Re: [PATCH 06/11] x86/virt/guest/xen: Remove use of pgd_list from  the Xen guest code Ingo Molnar <mingo@kernel.org> - 2015-09-29 10:50 +0200
  [PATCH 10/11] x86/mm: Remove pgd_list leftovers Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200
  [PATCH 08/11] x86/mm/pat/32: Remove pgd_list use from the PAT code Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200
  [PATCH 09/11] x86/mm: Make pgd_alloc()/pgd_free() lockless Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200
  [PATCH 02/11] x86/mm/hotplug: Remove pgd_list use from the memory hotplug code Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200
    Re: [PATCH 02/11] x86/mm/hotplug: Remove pgd_list use from the memory  hotplug code Linus Torvalds <torvalds@linux-foundation.org> - 2015-09-22 19:50 +0200
      Re: [PATCH 02/11] x86/mm/hotplug: Remove pgd_list use from the  memory hotplug code Oleg Nesterov <oleg@redhat.com> - 2015-09-23 13:50 +0200
        Re: [PATCH 02/11] x86/mm/hotplug: Remove pgd_list use from the  memory hotplug code Ingo Molnar <mingo@kernel.org> - 2015-09-29 10:50 +0200
          Re: [PATCH 02/11] x86/mm/hotplug: Remove pgd_list use from the  memory hotplug code Oleg Nesterov <oleg@redhat.com> - 2015-09-29 19:00 +0200
  [PATCH 03/11] x86/mm/hotplug: Don't remove PGD entries in remove_pagetable() Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200
  [PATCH 01/11] x86/mm/pat: Don't free PGD entries on memory unmap Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200
    Re: [PATCH 01/11] x86/mm/pat: Don't free PGD entries on memory unmap Linus Torvalds <torvalds@linux-foundation.org> - 2015-09-22 19:50 +0200
      Re: [PATCH 01/11] x86/mm/pat: Don't free PGD entries on memory unmap Andy Lutomirski <luto@amacapital.net> - 2015-09-22 20:10 +0200
  [PATCH 04/11] x86/mm/hotplug: Simplify sync_global_pgds() Ingo Molnar <mingo@kernel.org> - 2015-09-22 08:30 +0200

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