Merge commit 'v2.6.35' into perf/core

Conflicts:
	tools/perf/Makefile
	tools/perf/util/hist.c

Merge reason: Resolve the conflicts and update to latest upstream.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

5 files changed, 37 insertions, 10 deletions

diff --git a/kernel/cred.c b/kernel/cred.c
index a2d5504fbcc2..60bc8b1e32e6 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -209,6 +209,31 @@ void exit_creds(struct task_struct *tsk)
         }
 }
 
+/**
+ * get_task_cred - Get another task's objective credentials
+ * @task: The task to query
+ *
+ * Get the objective credentials of a task, pinning them so that they can't go
+ * away.  Accessing a task's credentials directly is not permitted.
+ *
+ * The caller must also make sure task doesn't get deleted, either by holding a
+ * ref on task or by holding tasklist_lock to prevent it from being unlinked.
+ */
+const struct cred *get_task_cred(struct task_struct *task)
+{
+        const struct cred *cred;
+
+        rcu_read_lock();
+
+        do {
+                cred = __task_cred((task));
+                BUG_ON(!cred);
+        } while (!atomic_inc_not_zero(&((struct cred *)cred)->usage));
+
+        rcu_read_unlock();
+        return cred;
+}
+
 /*
  * Allocate blank credentials, such that the credentials can be filled in at a
  * later date without risk of ENOMEM.
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index 5cb7cd1de10c..8bc5eeffec8a 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -605,13 +605,13 @@ cpu_master_loop:
                 if (dbg_kdb_mode) {
                         kgdb_connected = 1;
                         error = kdb_stub(ks);
+                        kgdb_connected = 0;
                 } else {
                         error = gdb_serial_stub(ks);
                 }
 
                 if (error == DBG_PASS_EVENT) {
                         dbg_kdb_mode = !dbg_kdb_mode;
-                        kgdb_connected = 0;
                 } else if (error == DBG_SWITCH_CPU_EVENT) {
                         dbg_cpu_switch(cpu, dbg_switch_cpu);
                         goto cpu_loop;
diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
index 4b17b3269525..e8fd6868682d 100644
--- a/kernel/debug/gdbstub.c
+++ b/kernel/debug/gdbstub.c
@@ -621,10 +621,8 @@ static void gdb_cmd_query(struct kgdb_state *ks)
         switch (remcom_in_buffer[1]) {
         case 's':
         case 'f':
-                if (memcmp(remcom_in_buffer + 2, "ThreadInfo", 10)) {
-                        error_packet(remcom_out_buffer, -EINVAL);
+                if (memcmp(remcom_in_buffer + 2, "ThreadInfo", 10))
                         break;
-                }
 
                 i = 0;
                 remcom_out_buffer[0] = 'm';
@@ -665,10 +663,9 @@ static void gdb_cmd_query(struct kgdb_state *ks)
                 pack_threadid(remcom_out_buffer + 2, thref);
                 break;
         case 'T':
-                if (memcmp(remcom_in_buffer + 1, "ThreadExtraInfo,", 16)) {
-                        error_packet(remcom_out_buffer, -EINVAL);
+                if (memcmp(remcom_in_buffer + 1, "ThreadExtraInfo,", 16))
                         break;
-                }
+
                 ks->threadid = 0;
                 ptr = remcom_in_buffer + 17;
                 kgdb_hex2long(&ptr, &ks->threadid);
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index 184cd8209c36..ebe4a287419e 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -1820,9 +1820,8 @@ static int kdb_sr(int argc, const char **argv)
 {
         if (argc != 1)
                 return KDB_ARGCOUNT;
-        sysrq_toggle_support(1);
         kdb_trap_printk++;
-        handle_sysrq(*argv[1], NULL);
+        __handle_sysrq(*argv[1], NULL, 0);
         kdb_trap_printk--;
 
         return 0;
@@ -1883,6 +1882,7 @@ static int kdb_lsmod(int argc, const char **argv)
                         kdb_printf(" (Loading)");
                 else
                         kdb_printf(" (Live)");
+                kdb_printf(" 0x%p", mod->module_core);
 
 #ifdef CONFIG_MODULE_UNLOAD
                 {
@@ -2291,6 +2291,9 @@ static int kdb_ll(int argc, const char **argv)
         while (va) {
                 char buf[80];
 
+                if (KDB_FLAG(CMD_INTERRUPT))
+                        return 0;
+
                 sprintf(buf, "%s " kdb_machreg_fmt "\n", command, va);
                 diag = kdb_parse(buf);
                 if (diag)
diff --git a/kernel/module.c b/kernel/module.c
index 5d2d28197c82..6c562828c85c 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -787,7 +787,6 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
 
         /* Store the name of the last unloaded module for diagnostic purposes */
         strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
-        ddebug_remove_module(mod->name);
 
         free_module(mod);
         return 0;
@@ -1550,6 +1549,9 @@ static void free_module(struct module *mod)
         remove_sect_attrs(mod);
         mod_kobject_remove(mod);
 
+        /* Remove dynamic debug info */
+        ddebug_remove_module(mod->name);
+
         /* Arch-specific cleanup. */
         module_arch_cleanup(mod);