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authorIngo Molnar <mingo@elte.hu>2010-08-02 10:29:56 +0400
committerIngo Molnar <mingo@elte.hu>2010-08-02 10:31:54 +0400
commit3772b734720e1a3f2dc1d95cfdfaa5332f4ccf01 (patch)
treea1a8cc85948c086aa12a1d8014151a7ca7c04ea8 /kernel
parent9fc3af467d0749989518a23f7289a6f44e5cb214 (diff)
parent9fe6206f400646a2322096b56c59891d530e8d51 (diff)
downloadlinux-3772b734720e1a3f2dc1d95cfdfaa5332f4ccf01.tar.xz
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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/cred.c25
-rw-r--r--kernel/debug/debug_core.c2
-rw-r--r--kernel/debug/gdbstub.c9
-rw-r--r--kernel/debug/kdb/kdb_main.c7
-rw-r--r--kernel/module.c4
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);