Commit 869c34f5 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'x86-fixes-for-linus' of... 

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: ce4100: Set pci ops via callback instead of module init
  x86/mm: Fix pgd_lock deadlock
  x86/mm: Handle mm_fault_error() in kernel space
  x86: Don't check for BIOS corruption in first 64K when there's no need to
parents 52d3c036 03150171

arch/x86/include/asm/ce4100.h

0 → 100644
+6 −0
Original line number Diff line number Diff line 
#ifndef _ASM_CE4100_H_

#define _ASM_CE4100_H_



int ce4100_pci_init(void);



#endif

arch/x86/kernel/check.c

+4 −4
Original line number Diff line number Diff line
@@ -106,8 +106,8 @@ void __init setup_bios_corruption_check(void) 
		addr += size;

	}



	printk(KERN_INFO "Scanning %d areas for low memory corruption\n",

	       num_scan_areas);

	if (num_scan_areas)

		printk(KERN_INFO "Scanning %d areas for low memory corruption\n", num_scan_areas);

}
@@ -148,7 +148,7 @@ static void check_corruption(struct work_struct *dummy) 


static int start_periodic_check_for_corruption(void)

{

	if (!memory_corruption_check || corruption_check_period == 0)

	if (!num_scan_areas || !memory_corruption_check || corruption_check_period == 0)

		return 0;



	printk(KERN_INFO "Scanning for low memory corruption every %d seconds\n",

arch/x86/mm/fault.c

+10 −4
Original line number Diff line number Diff line
@@ -229,15 +229,14 @@ void vmalloc_sync_all(void) 
	for (address = VMALLOC_START & PMD_MASK;

	     address >= TASK_SIZE && address < FIXADDR_TOP;

	     address += PMD_SIZE) {



		unsigned long flags;

		struct page *page;



		spin_lock_irqsave(&pgd_lock, flags);

		spin_lock(&pgd_lock);

		list_for_each_entry(page, &pgd_list, lru) {

			spinlock_t *pgt_lock;

			pmd_t *ret;



			/* the pgt_lock only for Xen */

			pgt_lock = &pgd_page_get_mm(page)->page_table_lock;



			spin_lock(pgt_lock);
@@ -247,7 +246,7 @@ void vmalloc_sync_all(void) 
			if (!ret)

				break;

		}

		spin_unlock_irqrestore(&pgd_lock, flags);

		spin_unlock(&pgd_lock);

	}

}
@@ -828,6 +827,13 @@ mm_fault_error(struct pt_regs *regs, unsigned long error_code, 
	       unsigned long address, unsigned int fault)

{

	if (fault & VM_FAULT_OOM) {

		/* Kernel mode? Handle exceptions or die: */

		if (!(error_code & PF_USER)) {

			up_read(&current->mm->mmap_sem);

			no_context(regs, error_code, address);

			return;

		}



		out_of_memory(regs, error_code, address);

	} else {

		if (fault & (VM_FAULT_SIGBUS|VM_FAULT_HWPOISON|

arch/x86/mm/init_64.c

+3 −3
Original line number Diff line number Diff line
@@ -105,18 +105,18 @@ void sync_global_pgds(unsigned long start, unsigned long end) 


	for (address = start; address <= end; address += PGDIR_SIZE) {

		const pgd_t *pgd_ref = pgd_offset_k(address);

		unsigned long flags;

		struct page *page;



		if (pgd_none(*pgd_ref))

			continue;



		spin_lock_irqsave(&pgd_lock, flags);

		spin_lock(&pgd_lock);

		list_for_each_entry(page, &pgd_list, lru) {

			pgd_t *pgd;

			spinlock_t *pgt_lock;



			pgd = (pgd_t *)page_address(page) + pgd_index(address);

			/* the pgt_lock only for Xen */

			pgt_lock = &pgd_page_get_mm(page)->page_table_lock;

			spin_lock(pgt_lock);
@@ -128,7 +128,7 @@ void sync_global_pgds(unsigned long start, unsigned long end) 


			spin_unlock(pgt_lock);

		}

		spin_unlock_irqrestore(&pgd_lock, flags);

		spin_unlock(&pgd_lock);

	}

}

arch/x86/mm/pageattr.c

+8 −10
Original line number Diff line number Diff line
@@ -57,12 +57,10 @@ static unsigned long direct_pages_count[PG_LEVEL_NUM]; 


void update_page_count(int level, unsigned long pages)

{

	unsigned long flags;



	/* Protect against CPA */

	spin_lock_irqsave(&pgd_lock, flags);

	spin_lock(&pgd_lock);

	direct_pages_count[level] += pages;

	spin_unlock_irqrestore(&pgd_lock, flags);

	spin_unlock(&pgd_lock);

}



static void split_page_count(int level)
@@ -394,7 +392,7 @@ static int 
try_preserve_large_page(pte_t *kpte, unsigned long address,

			struct cpa_data *cpa)

{

	unsigned long nextpage_addr, numpages, pmask, psize, flags, addr, pfn;

	unsigned long nextpage_addr, numpages, pmask, psize, addr, pfn;

	pte_t new_pte, old_pte, *tmp;

	pgprot_t old_prot, new_prot, req_prot;

	int i, do_split = 1;
@@ -403,7 +401,7 @@ try_preserve_large_page(pte_t *kpte, unsigned long address, 
	if (cpa->force_split)

		return 1;



	spin_lock_irqsave(&pgd_lock, flags);

	spin_lock(&pgd_lock);

	/*

	 * Check for races, another CPU might have split this page

	 * up already:
@@ -498,14 +496,14 @@ try_preserve_large_page(pte_t *kpte, unsigned long address, 
	}



out_unlock:

	spin_unlock_irqrestore(&pgd_lock, flags);

	spin_unlock(&pgd_lock);



	return do_split;

}



static int split_large_page(pte_t *kpte, unsigned long address)

{

	unsigned long flags, pfn, pfninc = 1;

	unsigned long pfn, pfninc = 1;

	unsigned int i, level;

	pte_t *pbase, *tmp;

	pgprot_t ref_prot;
@@ -519,7 +517,7 @@ static int split_large_page(pte_t *kpte, unsigned long address) 
	if (!base)

		return -ENOMEM;



	spin_lock_irqsave(&pgd_lock, flags);

	spin_lock(&pgd_lock);

	/*

	 * Check for races, another CPU might have split this page

	 * up for us already:
@@ -591,7 +589,7 @@ out_unlock: 
	 */

	if (base)

		__free_page(base);

	spin_unlock_irqrestore(&pgd_lock, flags);

	spin_unlock(&pgd_lock);



	return 0;

}

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