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, smpboot: Fix cores per node printing on boot
  x86/amd-iommu: Fall back to GART if initialization fails
  x86/amd-iommu: Fix crash when request_mem_region fails
  x86/mm: Remove unused DBG() macro
  arch/x86/kernel: Add missing spin_unlock

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index fa5a147..0d20286 100644 (file)
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1487,6 +1487,7 @@ static int __attach_device(struct device *dev,
                           struct protection_domain *domain)
 {
        struct iommu_dev_data *dev_data, *alias_data;
+       int ret;
 
        dev_data   = get_dev_data(dev);
        alias_data = get_dev_data(dev_data->alias);
@@ -1498,13 +1499,14 @@ static int __attach_device(struct device *dev,
        spin_lock(&domain->lock);
 
        /* Some sanity checks */
+       ret = -EBUSY;
        if (alias_data->domain != NULL &&
            alias_data->domain != domain)
-               return -EBUSY;
+               goto out_unlock;
 
        if (dev_data->domain != NULL &&
            dev_data->domain != domain)
-               return -EBUSY;
+               goto out_unlock;
 
        /* Do real assignment */
        if (dev_data->alias != dev) {
@@ -1520,10 +1522,14 @@ static int __attach_device(struct device *dev,
 
        atomic_inc(&dev_data->bind);
 
+       ret = 0;
+
+out_unlock:
+
        /* ready */
        spin_unlock(&domain->lock);
 
-       return 0;
+       return ret;
 }
 
 /*
@@ -2324,10 +2330,6 @@ int __init amd_iommu_init_dma_ops(void)
 
        iommu_detected = 1;
        swiotlb = 0;
-#ifdef CONFIG_GART_IOMMU
-       gart_iommu_aperture_disabled = 1;
-       gart_iommu_aperture = 0;
-#endif
 
        /* Make the driver finally visible to the drivers */
        dma_ops = &amd_iommu_dma_ops;

diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 3bacb4d..3cc63e2 100644 (file)
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -287,8 +287,12 @@ static u8 * __init iommu_map_mmio_space(u64 address)
 {
        u8 *ret;
 
-       if (!request_mem_region(address, MMIO_REGION_LENGTH, "amd_iommu"))
+       if (!request_mem_region(address, MMIO_REGION_LENGTH, "amd_iommu")) {
+               pr_err("AMD-Vi: Can not reserve memory region %llx for mmio\n",
+                       address);
+               pr_err("AMD-Vi: This is a BIOS bug. Please contact your hardware vendor\n");
                return NULL;
+       }
 
        ret = ioremap_nocache(address, MMIO_REGION_LENGTH);
        if (ret != NULL)
@@ -1314,7 +1318,7 @@ static int __init amd_iommu_init(void)
                ret = amd_iommu_init_dma_ops();
 
        if (ret)
-               goto free;
+               goto free_disable;
 
        amd_iommu_init_api();
 
@@ -1332,9 +1336,10 @@ static int __init amd_iommu_init(void)
 out:
        return ret;
 
-free:
+free_disable:
        disable_iommus();
 
+free:
        amd_iommu_uninit_devices();
 
        free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
@@ -1353,6 +1358,15 @@ free:
 
        free_unity_maps();
 
+#ifdef CONFIG_GART_IOMMU
+       /*
+        * We failed to initialize the AMD IOMMU - try fallback to GART
+        * if possible.
+        */
+       gart_iommu_init();
+
+#endif
+
        goto out;
 }
 

diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index cf59276..de3b63a 100644 (file)
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -21,12 +21,6 @@
 #include <asm/cpu.h>
 #include <asm/stackprotector.h>
 
-#ifdef CONFIG_DEBUG_PER_CPU_MAPS
-# define DBG(fmt, ...) pr_dbg(fmt, ##__VA_ARGS__)
-#else
-# define DBG(fmt, ...) do { if (0) pr_dbg(fmt, ##__VA_ARGS__); } while (0)
-#endif
-
 DEFINE_PER_CPU(int, cpu_number);
 EXPORT_PER_CPU_SYMBOL(cpu_number);
 

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 37462f1..c4f33b2 100644 (file)
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -686,7 +686,7 @@ static void __cpuinit do_fork_idle(struct work_struct *work)
 static void __cpuinit announce_cpu(int cpu, int apicid)
 {
        static int current_node = -1;
-       int node = cpu_to_node(cpu);
+       int node = early_cpu_to_node(cpu);
 
        if (system_state == SYSTEM_BOOTING) {
                if (node != current_node) {

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 550df48..787c52c 100644 (file)
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -3,12 +3,6 @@
 #include <linux/module.h>
 #include <linux/bootmem.h>
 
-#ifdef CONFIG_DEBUG_PER_CPU_MAPS
-# define DBG(x...) printk(KERN_DEBUG x)
-#else
-# define DBG(x...)
-#endif
-
 /*
  * Which logical CPUs are on which nodes
  */