]> Pileus Git - ~andy/linux/commitdiff
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
authorLinus Torvalds <torvalds@linux-foundation.org>
Fri, 28 Mar 2014 22:09:37 +0000 (15:09 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 28 Mar 2014 22:09:37 +0000 (15:09 -0700)
Pull networking fixes from David Miller:

 1) We've discovered a common error in several networking drivers, they
    put VLAN offload features into ->vlan_features, which would suggest
    that they support offloading 2 or more levels of VLAN encapsulation.
    Not only do these devices not do that, but we don't have the
    infrastructure yet to handle that at all.

    Fixes from Vlad Yasevich.

 2) Fix tcpdump crash with bridging and vlans, also from Vlad.

 3) Some MAINTAINERS updates for random32 and bonding.

 4) Fix late reseeds of prandom generator, from Sasha Levin.

 5) Bridge doesn't handle stacked vlans properly, fix from Toshiaki
    Makita.

 6) Fix deadlock in openvswitch, from Flavio Leitner.

 7) get_timewait4_sock() doesn't report delay times correctly, fix from
    Eric Dumazet.

 8) Duplicate address detection and addrconf verification need to run in
    contexts where RTNL can be obtained.  Move them to run from a
    workqueue.  From Hannes Frederic Sowa.

 9) Fix route refcount leaking in ip tunnels, from Pravin B Shelar.

10) Don't return -EINTR from non-blocking recvmsg() on AF_UNIX sockets,
    from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (28 commits)
  vlan: Warn the user if lowerdev has bad vlan features.
  veth: Turn off vlan rx acceleration in vlan_features
  ifb: Remove vlan acceleration from vlan_features
  qlge: Do not propaged vlan tag offloads to vlans
  bridge: Fix crash with vlan filtering and tcpdump
  net: Account for all vlan headers in skb_mac_gso_segment
  MAINTAINERS: bonding: change email address
  MAINTAINERS: bonding: change email address
  ipv6: move DAD and addrconf_verify processing to workqueue
  tcp: fix get_timewait4_sock() delay computation on 64bit
  openvswitch: fix a possible deadlock and lockdep warning
  bridge: Fix handling stacked vlan tags
  bridge: Fix inabillity to retrieve vlan tags when tx offload is disabled
  vhost: validate vhost_get_vq_desc return value
  vhost: fix total length when packets are too short
  random32: avoid attempt to late reseed if in the middle of seeding
  random32: assign to network folks in MAINTAINERS
  net/mlx4_core: pass pci_device_id.driver_data to __mlx4_init_one during reset
  core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors
  vlan: Set hard_header_len according to available acceleration
  ...

16 files changed:
arch/x86/include/asm/pgtable.h
arch/x86/include/asm/topology.h
arch/x86/xen/mmu.c
drivers/gpu/drm/i915/i915_gem_gtt.c
drivers/gpu/drm/nouveau/nouveau_drm.c
drivers/gpu/drm/radeon/radeon_drv.c
drivers/gpu/drm/udl/udl_gem.c
drivers/i2c/busses/i2c-cpm.c
drivers/input/keyboard/adp5588-keys.c
drivers/input/misc/da9052_onkey.c
drivers/input/mouse/cypress_ps2.c
drivers/input/mouse/synaptics.c
drivers/xen/balloon.c
fs/anon_inodes.c
fs/ocfs2/stackglue.c
kernel/trace/trace.c

index 5ad38ad07890fc4ca8698aae41c6e60e48a451f4..bbc8b12fa443d47ee9a8faa59b36767e7aec866c 100644 (file)
@@ -445,20 +445,10 @@ static inline int pte_same(pte_t a, pte_t b)
        return a.pte == b.pte;
 }
 
-static inline int pteval_present(pteval_t pteval)
-{
-       /*
-        * Yes Linus, _PAGE_PROTNONE == _PAGE_NUMA. Expressing it this
-        * way clearly states that the intent is that protnone and numa
-        * hinting ptes are considered present for the purposes of
-        * pagetable operations like zapping, protection changes, gup etc.
-        */
-       return pteval & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_NUMA);
-}
-
 static inline int pte_present(pte_t a)
 {
-       return pteval_present(pte_flags(a));
+       return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE |
+                              _PAGE_NUMA);
 }
 
 #define pte_accessible pte_accessible
index d35f24e231cd2429c8d17c0d5b3d722951d3e04b..1306d117967daa60b2947c30b1fd682255641a51 100644 (file)
@@ -119,9 +119,10 @@ static inline void setup_node_to_cpumask_map(void) { }
 
 extern const struct cpumask *cpu_coregroup_mask(int cpu);
 
-#ifdef ENABLE_TOPO_DEFINES
 #define topology_physical_package_id(cpu)      (cpu_data(cpu).phys_proc_id)
 #define topology_core_id(cpu)                  (cpu_data(cpu).cpu_core_id)
+
+#ifdef ENABLE_TOPO_DEFINES
 #define topology_core_cpumask(cpu)             (per_cpu(cpu_core_map, cpu))
 #define topology_thread_cpumask(cpu)           (per_cpu(cpu_sibling_map, cpu))
 #endif
index 256282e7888b118b02e61d657f78ae8490bf0fe4..2423ef04ffea596fd43eeb918f290003277fbb21 100644 (file)
@@ -365,7 +365,7 @@ void xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
 /* Assume pteval_t is equivalent to all the other *val_t types. */
 static pteval_t pte_mfn_to_pfn(pteval_t val)
 {
-       if (pteval_present(val)) {
+       if (val & _PAGE_PRESENT) {
                unsigned long mfn = (val & PTE_PFN_MASK) >> PAGE_SHIFT;
                unsigned long pfn = mfn_to_pfn(mfn);
 
@@ -381,7 +381,7 @@ static pteval_t pte_mfn_to_pfn(pteval_t val)
 
 static pteval_t pte_pfn_to_mfn(pteval_t val)
 {
-       if (pteval_present(val)) {
+       if (val & _PAGE_PRESENT) {
                unsigned long pfn = (val & PTE_PFN_MASK) >> PAGE_SHIFT;
                pteval_t flags = val & PTE_FLAGS_MASK;
                unsigned long mfn;
index 40a2b36b276baa774028b56ae60b6ae6c59e919d..d278be110805ba50965f1e071213720434cb9e78 100644 (file)
@@ -842,7 +842,7 @@ void i915_gem_suspend_gtt_mappings(struct drm_device *dev)
        dev_priv->gtt.base.clear_range(&dev_priv->gtt.base,
                                       dev_priv->gtt.base.start / PAGE_SIZE,
                                       dev_priv->gtt.base.total / PAGE_SIZE,
-                                      false);
+                                      true);
 }
 
 void i915_gem_restore_gtt_mappings(struct drm_device *dev)
index 89c484d8ac2666d8b3c04bb818cb5eec2665bb38..4ee702ac8907bcc3d486000b525ad61857cdf5ff 100644 (file)
@@ -866,13 +866,16 @@ static int nouveau_pmops_runtime_suspend(struct device *dev)
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        int ret;
 
-       if (nouveau_runtime_pm == 0)
-               return -EINVAL;
+       if (nouveau_runtime_pm == 0) {
+               pm_runtime_forbid(dev);
+               return -EBUSY;
+       }
 
        /* are we optimus enabled? */
        if (nouveau_runtime_pm == -1 && !nouveau_is_optimus() && !nouveau_is_v1_dsm()) {
                DRM_DEBUG_DRIVER("failing to power off - not optimus\n");
-               return -EINVAL;
+               pm_runtime_forbid(dev);
+               return -EBUSY;
        }
 
        nv_debug_level(SILENT);
@@ -923,12 +926,15 @@ static int nouveau_pmops_runtime_idle(struct device *dev)
        struct nouveau_drm *drm = nouveau_drm(drm_dev);
        struct drm_crtc *crtc;
 
-       if (nouveau_runtime_pm == 0)
+       if (nouveau_runtime_pm == 0) {
+               pm_runtime_forbid(dev);
                return -EBUSY;
+       }
 
        /* are we optimus enabled? */
        if (nouveau_runtime_pm == -1 && !nouveau_is_optimus() && !nouveau_is_v1_dsm()) {
                DRM_DEBUG_DRIVER("failing to power off - not optimus\n");
+               pm_runtime_forbid(dev);
                return -EBUSY;
        }
 
index 84a1bbb75f914a7bd914ad9120b8a2e2ac9aac5a..f633c2782170b09bcc8722d1568cbe0a8c665f12 100644 (file)
@@ -403,11 +403,15 @@ static int radeon_pmops_runtime_suspend(struct device *dev)
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        int ret;
 
-       if (radeon_runtime_pm == 0)
-               return -EINVAL;
+       if (radeon_runtime_pm == 0) {
+               pm_runtime_forbid(dev);
+               return -EBUSY;
+       }
 
-       if (radeon_runtime_pm == -1 && !radeon_is_px())
-               return -EINVAL;
+       if (radeon_runtime_pm == -1 && !radeon_is_px()) {
+               pm_runtime_forbid(dev);
+               return -EBUSY;
+       }
 
        drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
        drm_kms_helper_poll_disable(drm_dev);
@@ -456,12 +460,15 @@ static int radeon_pmops_runtime_idle(struct device *dev)
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        struct drm_crtc *crtc;
 
-       if (radeon_runtime_pm == 0)
+       if (radeon_runtime_pm == 0) {
+               pm_runtime_forbid(dev);
                return -EBUSY;
+       }
 
        /* are we PX enabled? */
        if (radeon_runtime_pm == -1 && !radeon_is_px()) {
                DRM_DEBUG_DRIVER("failing to power off - not px\n");
+               pm_runtime_forbid(dev);
                return -EBUSY;
        }
 
index 8d67b943ac05ce2d1dd44597d00a1e5a07fd9bdb..0394811251bd7e8dd75159d9d01b045d089d2290 100644 (file)
@@ -177,8 +177,10 @@ void udl_gem_free_object(struct drm_gem_object *gem_obj)
        if (obj->vmapping)
                udl_gem_vunmap(obj);
 
-       if (gem_obj->import_attach)
+       if (gem_obj->import_attach) {
                drm_prime_gem_destroy(gem_obj, obj->sg);
+               put_device(gem_obj->dev->dev);
+       }
 
        if (obj->pages)
                udl_gem_put_pages(obj);
@@ -256,9 +258,12 @@ struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
        int ret;
 
        /* need to attach */
+       get_device(dev->dev);
        attach = dma_buf_attach(dma_buf, dev->dev);
-       if (IS_ERR(attach))
+       if (IS_ERR(attach)) {
+               put_device(dev->dev);
                return ERR_CAST(attach);
+       }
 
        get_dma_buf(dma_buf);
 
@@ -282,6 +287,6 @@ fail_unmap:
 fail_detach:
        dma_buf_detach(dma_buf, attach);
        dma_buf_put(dma_buf);
-
+       put_device(dev->dev);
        return ERR_PTR(ret);
 }
index be7f0a20d634d1107a7bb3147b32edf0256546ed..f3b89a4698b6192a24d031bab358796e51fbb767 100644 (file)
@@ -39,7 +39,9 @@
 #include <linux/i2c.h>
 #include <linux/io.h>
 #include <linux/dma-mapping.h>
+#include <linux/of_address.h>
 #include <linux/of_device.h>
+#include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <sysdev/fsl_soc.h>
 #include <asm/cpm.h>
index bb3b57bea8ba4578df5d29c72230882ac29bd62a..5ef7fcf0e2509b8196cf69a993247febae4c20b7 100644 (file)
@@ -76,8 +76,18 @@ static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off)
        struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
        unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
        unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
+       int val;
 
-       return !!(adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank) & bit);
+       mutex_lock(&kpad->gpio_lock);
+
+       if (kpad->dir[bank] & bit)
+               val = kpad->dat_out[bank];
+       else
+               val = adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank);
+
+       mutex_unlock(&kpad->gpio_lock);
+
+       return !!(val & bit);
 }
 
 static void adp5588_gpio_set_value(struct gpio_chip *chip,
index 1f695f229ea8988001da801bb60db7b6d939f293..184c8f21ab59a9736feb262f79331cae878af1ff 100644 (file)
@@ -27,29 +27,32 @@ struct da9052_onkey {
 
 static void da9052_onkey_query(struct da9052_onkey *onkey)
 {
-       int key_stat;
+       int ret;
 
-       key_stat = da9052_reg_read(onkey->da9052, DA9052_EVENT_B_REG);
-       if (key_stat < 0) {
+       ret = da9052_reg_read(onkey->da9052, DA9052_STATUS_A_REG);
+       if (ret < 0) {
                dev_err(onkey->da9052->dev,
-                       "Failed to read onkey event %d\n", key_stat);
+                       "Failed to read onkey event err=%d\n", ret);
        } else {
                /*
                 * Since interrupt for deassertion of ONKEY pin is not
                 * generated, onkey event state determines the onkey
                 * button state.
                 */
-               key_stat &= DA9052_EVENTB_ENONKEY;
-               input_report_key(onkey->input, KEY_POWER, key_stat);
+               bool pressed = !(ret & DA9052_STATUSA_NONKEY);
+
+               input_report_key(onkey->input, KEY_POWER, pressed);
                input_sync(onkey->input);
-       }
 
-       /*
-        * Interrupt is generated only when the ONKEY pin is asserted.
-        * Hence the deassertion of the pin is simulated through work queue.
-        */
-       if (key_stat)
-               schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
+               /*
+                * Interrupt is generated only when the ONKEY pin
+                * is asserted.  Hence the deassertion of the pin
+                * is simulated through work queue.
+                */
+               if (pressed)
+                       schedule_delayed_work(&onkey->work,
+                                               msecs_to_jiffies(50));
+       }
 }
 
 static void da9052_onkey_work(struct work_struct *work)
index 87095e2f5153c7dedeae38a18cd10efaa62a9e0c..8af34ffe208b16eff1ab240de45967fb84b6610f 100644 (file)
@@ -409,7 +409,6 @@ static int cypress_set_input_params(struct input_dev *input,
        __clear_bit(REL_X, input->relbit);
        __clear_bit(REL_Y, input->relbit);
 
-       __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
        __set_bit(EV_KEY, input->evbit);
        __set_bit(BTN_LEFT, input->keybit);
        __set_bit(BTN_RIGHT, input->keybit);
index 26386f9d25696841584f4b7f698a3cc8727fdc54..d8d49d10f9bb60d477124bba603fb9f61be1efdb 100644 (file)
@@ -265,11 +265,22 @@ static int synaptics_identify(struct psmouse *psmouse)
  * Read touchpad resolution and maximum reported coordinates
  * Resolution is left zero if touchpad does not support the query
  */
+
+static const int *quirk_min_max;
+
 static int synaptics_resolution(struct psmouse *psmouse)
 {
        struct synaptics_data *priv = psmouse->private;
        unsigned char resp[3];
 
+       if (quirk_min_max) {
+               priv->x_min = quirk_min_max[0];
+               priv->x_max = quirk_min_max[1];
+               priv->y_min = quirk_min_max[2];
+               priv->y_max = quirk_min_max[3];
+               return 0;
+       }
+
        if (SYN_ID_MAJOR(priv->identity) < 4)
                return 0;
 
@@ -1485,10 +1496,54 @@ static const struct dmi_system_id olpc_dmi_table[] __initconst = {
        { }
 };
 
+static const struct dmi_system_id min_max_dmi_table[] __initconst = {
+#if defined(CONFIG_DMI)
+       {
+               /* Lenovo ThinkPad Helix */
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+                       DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"),
+               },
+               .driver_data = (int []){1024, 5052, 2258, 4832},
+       },
+       {
+               /* Lenovo ThinkPad X240 */
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+                       DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X240"),
+               },
+               .driver_data = (int []){1232, 5710, 1156, 4696},
+       },
+       {
+               /* Lenovo ThinkPad T440s */
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+                       DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T440"),
+               },
+               .driver_data = (int []){1024, 5112, 2024, 4832},
+       },
+       {
+               /* Lenovo ThinkPad T540p */
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+                       DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T540"),
+               },
+               .driver_data = (int []){1024, 5056, 2058, 4832},
+       },
+#endif
+       { }
+};
+
 void __init synaptics_module_init(void)
 {
+       const struct dmi_system_id *min_max_dmi;
+
        impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
        broken_olpc_ec = dmi_check_system(olpc_dmi_table);
+
+       min_max_dmi = dmi_first_match(min_max_dmi_table);
+       if (min_max_dmi)
+               quirk_min_max = min_max_dmi->driver_data;
 }
 
 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
index 37d06ea624aa953d40448bcd2a2d4943baf79fa9..61a6ac8fa8fc7ab00dcc7c33cea47981f2509d4b 100644 (file)
@@ -399,11 +399,25 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp)
                        state = BP_EAGAIN;
                        break;
                }
+               scrub_page(page);
 
-               pfn = page_to_pfn(page);
-               frame_list[i] = pfn_to_mfn(pfn);
+               frame_list[i] = page_to_pfn(page);
+       }
 
-               scrub_page(page);
+       /*
+        * Ensure that ballooned highmem pages don't have kmaps.
+        *
+        * Do this before changing the p2m as kmap_flush_unused()
+        * reads PTEs to obtain pages (and hence needs the original
+        * p2m entry).
+        */
+       kmap_flush_unused();
+
+       /* Update direct mapping, invalidate P2M, and add to balloon. */
+       for (i = 0; i < nr_pages; i++) {
+               pfn = frame_list[i];
+               frame_list[i] = pfn_to_mfn(pfn);
+               page = pfn_to_page(pfn);
 
 #ifdef CONFIG_XEN_HAVE_PVMMU
                /*
@@ -429,11 +443,9 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp)
                }
 #endif
 
-               balloon_append(pfn_to_page(pfn));
+               balloon_append(page);
        }
 
-       /* Ensure that ballooned highmem pages don't have kmaps. */
-       kmap_flush_unused();
        flush_tlb_all();
 
        set_xen_guest_handle(reservation.extent_start, frame_list);
index 24084732b1d0b264b5c3262796f1ec3dd5fc505f..80ef38c73e5a16af0f9443d94bec3aae700370df 100644 (file)
@@ -41,19 +41,8 @@ static const struct dentry_operations anon_inodefs_dentry_operations = {
 static struct dentry *anon_inodefs_mount(struct file_system_type *fs_type,
                                int flags, const char *dev_name, void *data)
 {
-       struct dentry *root;
-       root = mount_pseudo(fs_type, "anon_inode:", NULL,
+       return mount_pseudo(fs_type, "anon_inode:", NULL,
                        &anon_inodefs_dentry_operations, ANON_INODE_FS_MAGIC);
-       if (!IS_ERR(root)) {
-               struct super_block *s = root->d_sb;
-               anon_inode_inode = alloc_anon_inode(s);
-               if (IS_ERR(anon_inode_inode)) {
-                       dput(root);
-                       deactivate_locked_super(s);
-                       root = ERR_CAST(anon_inode_inode);
-               }
-       }
-       return root;
 }
 
 static struct file_system_type anon_inode_fs_type = {
@@ -175,22 +164,15 @@ EXPORT_SYMBOL_GPL(anon_inode_getfd);
 
 static int __init anon_inode_init(void)
 {
-       int error;
-
-       error = register_filesystem(&anon_inode_fs_type);
-       if (error)
-               goto err_exit;
        anon_inode_mnt = kern_mount(&anon_inode_fs_type);
-       if (IS_ERR(anon_inode_mnt)) {
-               error = PTR_ERR(anon_inode_mnt);
-               goto err_unregister_filesystem;
-       }
-       return 0;
+       if (IS_ERR(anon_inode_mnt))
+               panic("anon_inode_init() kernel mount failed (%ld)\n", PTR_ERR(anon_inode_mnt));
 
-err_unregister_filesystem:
-       unregister_filesystem(&anon_inode_fs_type);
-err_exit:
-       panic(KERN_ERR "anon_inode_init() failed (%d)\n", error);
+       anon_inode_inode = alloc_anon_inode(anon_inode_mnt->mnt_sb);
+       if (IS_ERR(anon_inode_inode))
+               panic("anon_inode_init() inode allocation failed (%ld)\n", PTR_ERR(anon_inode_inode));
+
+       return 0;
 }
 
 fs_initcall(anon_inode_init);
index 1324e6600e57378b8e4d1624dc1366af57fde7b2..ca5ce14cbddcef81498305f8ccbccc978750faed 100644 (file)
@@ -346,7 +346,9 @@ int ocfs2_cluster_connect(const char *stack_name,
 
        strlcpy(new_conn->cc_name, group, GROUP_NAME_MAX + 1);
        new_conn->cc_namelen = grouplen;
-       strlcpy(new_conn->cc_cluster_name, cluster_name, CLUSTER_NAME_MAX + 1);
+       if (cluster_name_len)
+               strlcpy(new_conn->cc_cluster_name, cluster_name,
+                       CLUSTER_NAME_MAX + 1);
        new_conn->cc_cluster_name_len = cluster_name_len;
        new_conn->cc_recovery_handler = recovery_handler;
        new_conn->cc_recovery_data = recovery_data;
index 815c878f409bd94e08777d1b9f83b1553f4a2e24..24c1f23825579df4f2bf46e2dca98e6af8fb4abd 100644 (file)
@@ -1600,15 +1600,31 @@ void trace_buffer_unlock_commit(struct ring_buffer *buffer,
 }
 EXPORT_SYMBOL_GPL(trace_buffer_unlock_commit);
 
+static struct ring_buffer *temp_buffer;
+
 struct ring_buffer_event *
 trace_event_buffer_lock_reserve(struct ring_buffer **current_rb,
                          struct ftrace_event_file *ftrace_file,
                          int type, unsigned long len,
                          unsigned long flags, int pc)
 {
+       struct ring_buffer_event *entry;
+
        *current_rb = ftrace_file->tr->trace_buffer.buffer;
-       return trace_buffer_lock_reserve(*current_rb,
+       entry = trace_buffer_lock_reserve(*current_rb,
                                         type, len, flags, pc);
+       /*
+        * If tracing is off, but we have triggers enabled
+        * we still need to look at the event data. Use the temp_buffer
+        * to store the trace event for the tigger to use. It's recusive
+        * safe and will not be recorded anywhere.
+        */
+       if (!entry && ftrace_file->flags & FTRACE_EVENT_FL_TRIGGER_COND) {
+               *current_rb = temp_buffer;
+               entry = trace_buffer_lock_reserve(*current_rb,
+                                                 type, len, flags, pc);
+       }
+       return entry;
 }
 EXPORT_SYMBOL_GPL(trace_event_buffer_lock_reserve);
 
@@ -6494,11 +6510,16 @@ __init static int tracer_alloc_buffers(void)
 
        raw_spin_lock_init(&global_trace.start_lock);
 
+       /* Used for event triggers */
+       temp_buffer = ring_buffer_alloc(PAGE_SIZE, RB_FL_OVERWRITE);
+       if (!temp_buffer)
+               goto out_free_cpumask;
+
        /* TODO: make the number of buffers hot pluggable with CPUS */
        if (allocate_trace_buffers(&global_trace, ring_buf_size) < 0) {
                printk(KERN_ERR "tracer: failed to allocate ring buffer!\n");
                WARN_ON(1);
-               goto out_free_cpumask;
+               goto out_free_temp_buffer;
        }
 
        if (global_trace.buffer_disabled)
@@ -6540,6 +6561,8 @@ __init static int tracer_alloc_buffers(void)
 
        return 0;
 
+out_free_temp_buffer:
+       ring_buffer_free(temp_buffer);
 out_free_cpumask:
        free_percpu(global_trace.trace_buffer.data);
 #ifdef CONFIG_TRACER_MAX_TRACE