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From: Andi Kleen <ak@suse.de>
To: tglx@linutronix.de, mingo@elte.hu, linux-kernel@vger.kernel.org
Subject: [PATCH] [10/12] GBPAGES: Remove now unused clear_kernel_mapping
Date: Fri,  1 Feb 2008 10:53:23 +0100 (CET)	[thread overview]
Message-ID: <20080201095323.5A1D31B416F@basil.firstfloor.org> (raw)
In-Reply-To: <200802011053.107168490@suse.de>


Signed-off-by: Andi Kleen <ak@suse.de>

---
 arch/x86/mm/init_64.c        |   43 -------------------------------------------
 include/asm-x86/pgtable_64.h |    1 -
 2 files changed, 44 deletions(-)

Index: linux/arch/x86/mm/init_64.c
===================================================================
--- linux.orig/arch/x86/mm/init_64.c
+++ linux/arch/x86/mm/init_64.c
@@ -456,49 +456,6 @@ void __init paging_init(void)
 #endif
 
 /*
- * Unmap a kernel mapping if it exists. This is useful to avoid
- * prefetches from the CPU leading to inconsistent cache lines.
- * address and size must be aligned to 2MB boundaries.
- * Does nothing when the mapping doesn't exist.
- */
-void __init clear_kernel_mapping(unsigned long address, unsigned long size)
-{
-	unsigned long end = address + size;
-
-	BUG_ON(address & ~PMD_PAGE_MASK);
-	BUG_ON(size & ~PMD_PAGE_MASK);
-
-	for (; address < end; address += PMD_PAGE_SIZE) {
-		pgd_t *pgd = pgd_offset_k(address);
-		pud_t *pud;
-		pmd_t *pmd;
-
-		if (pgd_none(*pgd))
-			continue;
-
-		pud = pud_offset(pgd, address);
-		if (pud_none(*pud))
-			continue;
-
-		pmd = pmd_offset(pud, address);
-		if (!pmd || pmd_none(*pmd))
-			continue;
-
-		if (!(pmd_val(*pmd) & _PAGE_PSE)) {
-			/*
-			 * Could handle this, but it should not happen
-			 * currently:
-			 */
-			printk(KERN_ERR "clear_kernel_mapping: "
-				"mapping has been split. will leak memory\n");
-			pmd_ERROR(*pmd);
-		}
-		set_pmd(pmd, __pmd(0));
-	}
-	__flush_tlb_all();
-}
-
-/*
  * Memory hotplug specific functions
  */
 void online_page(struct page *page)
Index: linux/include/asm-x86/pgtable_64.h
===================================================================
--- linux.orig/include/asm-x86/pgtable_64.h
+++ linux/include/asm-x86/pgtable_64.h
@@ -21,7 +21,6 @@ extern pgd_t init_level4_pgt[];
 #define swapper_pg_dir init_level4_pgt
 
 extern void paging_init(void);
-extern void clear_kernel_mapping(unsigned long addr, unsigned long size);
 
 #endif /* !__ASSEMBLY__ */
 

  parent reply	other threads:[~2008-02-01  9:56 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-01  9:53 [PATCH] [0/12] GBPAGES patchkit for 2.6.25 v3 Andi Kleen
2008-02-01  9:53 ` [PATCH] [1/12] GBPAGES: Add feature macros for the gbpages cpuid bit Andi Kleen
2008-02-01  9:53 ` [PATCH] [2/12] GBPAGES: Rename LARGE_PAGE_SIZE to PMD_PAGE_SIZE Andi Kleen
2008-02-01  9:53 ` [PATCH] [3/12] GBPAGES: Add PUD_PAGE_SIZE Andi Kleen
2008-02-01  9:53 ` [PATCH] [4/12] Add pgtable accessor functions for GB pages Andi Kleen
2008-02-01  9:53 ` [PATCH] [5/12] GBPAGES: Support gbpages in pagetable dump Andi Kleen
2008-02-01  9:53 ` [PATCH] [6/12] GBPAGES: Add gbpages support to lookup_address Andi Kleen
2008-02-01  9:53 ` [PATCH] [7/12] GBPAGES: Add an option to disable direct mapping gbpages and a global variable Andi Kleen
2008-02-05 22:41   ` Randy Dunlap
2008-02-01  9:53 ` [PATCH] [8/12] GBPAGES: Implement gbpages support in change_page_attr() Andi Kleen
2008-02-01  9:53 ` [PATCH] [9/12] GBPAGES: Switch pci-gart over to using cpa instead of clear_kernel_mapping Andi Kleen
2008-02-01  9:53 ` Andi Kleen [this message]
2008-02-01  9:53 ` [PATCH] [11/12] GBPAGES: Do kernel direct mapping at boot using GB pages Andi Kleen
2008-02-01  9:53 ` [PATCH] [12/12] GBPAGES: Switch direct mapping setup over to set_pte Andi Kleen
2008-02-01 17:37   ` Jeremy Fitzhardinge
2008-02-01 17:58     ` Andi Kleen
2008-02-01 19:16       ` Jeremy Fitzhardinge
2008-02-01 12:25 ` [PATCH] [0/12] GBPAGES patchkit for 2.6.25 v3 Thomas Gleixner

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