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

* '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

diff --git a/arch/x86/include/asm/ce4100.h b/arch/x86/include/asm/ce4100.h
new file mode 100644 (file)
index 0000000..e656ad8
--- /dev/null
+++ b/arch/x86/include/asm/ce4100.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_CE4100_H_
+#define _ASM_CE4100_H_
+
+int ce4100_pci_init(void);
+
+#endif

diff --git a/arch/x86/kernel/check.c b/arch/x86/kernel/check.c
index 13a389179514eb4b17c7d5fc6d5100e1996d0770..452932d3473077cabf505d00f96073319c93b983 100644 (file)
--- a/arch/x86/kernel/check.c
+++ b/arch/x86/kernel/check.c
@@ -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);
 }
 
 
@@ -143,12 +143,12 @@ static void check_corruption(struct work_struct *dummy)
 {
        check_for_bios_corruption();
        schedule_delayed_work(&bios_check_work,
-               round_jiffies_relative(corruption_check_period*HZ)); 
+               round_jiffies_relative(corruption_check_period*HZ));
 }
 
 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",

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 7d90ceb882a41ec55f0d8aea7b2c40cd806afd81..20e3f8702d1e5701b130d2891e23bf39fbe81663 100644 (file)
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -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|

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 71a59296af80779f56d3f31c98f0ce2d790fe373..c14a5422e15226e72b1b7bc9655a0982ea706555 100644 (file)
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -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);
        }
 }
 

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index d343b3c81f3c1e79a7a4f21eb51dc4672f7a1c9b..90825f2eb0f4ef25c9f4d474b29d6a986014f012 100644 (file)
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -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;
 }

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 500242d3c96d61741607af926d3675ed9a309c46..0113d19c8aa60985764dfce5bcc4488c8ee57c5c 100644 (file)
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -121,14 +121,12 @@ static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd)
 
 static void pgd_dtor(pgd_t *pgd)
 {
-       unsigned long flags; /* can be called from interrupt context */
-
        if (SHARED_KERNEL_PMD)
                return;
 
-       spin_lock_irqsave(&pgd_lock, flags);
+       spin_lock(&pgd_lock);
        pgd_list_del(pgd);
-       spin_unlock_irqrestore(&pgd_lock, flags);
+       spin_unlock(&pgd_lock);
 }
 
 /*
@@ -260,7 +258,6 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
 {
        pgd_t *pgd;
        pmd_t *pmds[PREALLOCATED_PMDS];
-       unsigned long flags;
 
        pgd = (pgd_t *)__get_free_page(PGALLOC_GFP);
 
@@ -280,12 +277,12 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
         * respect to anything walking the pgd_list, so that they
         * never see a partially populated pgd.
         */
-       spin_lock_irqsave(&pgd_lock, flags);
+       spin_lock(&pgd_lock);
 
        pgd_ctor(mm, pgd);
        pgd_prepopulate_pmd(mm, pgd, pmds);
 
-       spin_unlock_irqrestore(&pgd_lock, flags);
+       spin_unlock(&pgd_lock);
 
        return pgd;
 

diff --git a/arch/x86/pci/ce4100.c b/arch/x86/pci/ce4100.c
index 85b68ef5e80965a7fecf7e00d10b34439f8d34fb..9260b3eb18d41f82be4c1befa1a47e1aea567cf1 100644 (file)
--- a/arch/x86/pci/ce4100.c
+++ b/arch/x86/pci/ce4100.c
@@ -34,6 +34,7 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 
+#include <asm/ce4100.h>
 #include <asm/pci_x86.h>
 
 struct sim_reg {
@@ -306,10 +307,10 @@ struct pci_raw_ops ce4100_pci_conf = {
        .write = ce4100_conf_write,
 };
 
-static int __init ce4100_pci_init(void)
+int __init ce4100_pci_init(void)
 {
        init_sim_regs();
        raw_pci_ops = &ce4100_pci_conf;
-       return 0;
+       /* Indicate caller that it should invoke pci_legacy_init() */
+       return 1;
 }
-subsys_initcall(ce4100_pci_init);

diff --git a/arch/x86/platform/ce4100/ce4100.c b/arch/x86/platform/ce4100/ce4100.c
index d2c0d51a71784def793560a71500e2394b939315..cd6f184c3b3f181e5431a50e1639e746c917bb76 100644 (file)
--- a/arch/x86/platform/ce4100/ce4100.c
+++ b/arch/x86/platform/ce4100/ce4100.c
@@ -15,6 +15,7 @@
 #include <linux/serial_reg.h>
 #include <linux/serial_8250.h>
 
+#include <asm/ce4100.h>
 #include <asm/setup.h>
 #include <asm/io.h>
 
@@ -129,4 +130,5 @@ void __init x86_ce4100_early_setup(void)
        x86_init.resources.probe_roms = x86_init_noop;
        x86_init.mpparse.get_smp_config = x86_init_uint_noop;
        x86_init.mpparse.find_smp_config = sdv_find_smp_config;
+       x86_init.pci.init = ce4100_pci_init;
 }

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 5e92b61ad574dd6514f09644737dd450d0311dd0..f6089421147a0affdc98916081a7fbf54eb70b39 100644 (file)
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -986,10 +986,9 @@ static void xen_pgd_pin(struct mm_struct *mm)
  */
 void xen_mm_pin_all(void)
 {
-       unsigned long flags;
        struct page *page;
 
-       spin_lock_irqsave(&pgd_lock, flags);
+       spin_lock(&pgd_lock);
 
        list_for_each_entry(page, &pgd_list, lru) {
                if (!PagePinned(page)) {
@@ -998,7 +997,7 @@ void xen_mm_pin_all(void)
                }
        }
 
-       spin_unlock_irqrestore(&pgd_lock, flags);
+       spin_unlock(&pgd_lock);
 }
 
 /*
@@ -1099,10 +1098,9 @@ static void xen_pgd_unpin(struct mm_struct *mm)
  */
 void xen_mm_unpin_all(void)
 {
-       unsigned long flags;
        struct page *page;
 
-       spin_lock_irqsave(&pgd_lock, flags);
+       spin_lock(&pgd_lock);
 
        list_for_each_entry(page, &pgd_list, lru) {
                if (PageSavePinned(page)) {
@@ -1112,7 +1110,7 @@ void xen_mm_unpin_all(void)
                }
        }
 
-       spin_unlock_irqrestore(&pgd_lock, flags);
+       spin_unlock(&pgd_lock);
 }
 
 void xen_activate_mm(struct mm_struct *prev, struct mm_struct *next)