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authorLinus Torvalds <torvalds@linux-foundation.org>2011-10-31 17:46:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-31 17:46:07 -0700
commit094803e0aab3fe75bbf8202a8f4b5280eaade375 (patch)
tree278528ca9245a767fcfcfa97d977bd5714c082fd /kernel
parent32087d4eeca14b82660dab288b1d659963b954bd (diff)
parentd8805e633e054c816c47cb6e727c81f156d9253d (diff)
Merge branch 'akpm' (Andrew's incoming)
Quoth Andrew: - Most of MM. Still waiting for the poweroc guys to get off their butts and review some threaded hugepages patches. - alpha - vfs bits - drivers/misc - a few core kerenl tweaks - printk() features - MAINTAINERS updates - backlight merge - leds merge - various lib/ updates - checkpatch updates * akpm: (127 commits) epoll: fix spurious lockdep warnings checkpatch: add a --strict check for utf-8 in commit logs kernel.h/checkpatch: mark strict_strto<foo> and simple_strto<foo> as obsolete llist-return-whether-list-is-empty-before-adding-in-llist_add-fix wireless: at76c50x: follow rename pack_hex_byte to hex_byte_pack fat: follow rename pack_hex_byte() to hex_byte_pack() security: follow rename pack_hex_byte() to hex_byte_pack() kgdb: follow rename pack_hex_byte() to hex_byte_pack() lib: rename pack_hex_byte() to hex_byte_pack() lib/string.c: fix strim() semantics for strings that have only blanks lib/idr.c: fix comment for ida_get_new_above() lib/percpu_counter.c: enclose hotplug only variables in hotplug ifdef lib/bitmap.c: quiet sparse noise about address space lib/spinlock_debug.c: print owner on spinlock lockup lib/kstrtox: common code between kstrto*() and simple_strto*() functions drivers/leds/leds-lp5521.c: check if reset is successful leds: turn the blink_timer off before starting to blink leds: save the delay values after a successful call to blink_set() drivers/leds/leds-gpio.c: use gpio_get_value_cansleep() when initializing drivers/leds/leds-lm3530.c: add __devexit_p where needed ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/debug/gdbstub.c12
-rw-r--r--kernel/events/core.c6
-rw-r--r--kernel/exit.c2
-rw-r--r--kernel/fork.c10
-rw-r--r--kernel/printk.c10
-rw-r--r--kernel/stop_machine.c22
-rw-r--r--kernel/sys_ni.c4
-rw-r--r--kernel/sysctl.c9
-rw-r--r--kernel/watchdog.c4
9 files changed, 54 insertions, 25 deletions
diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
index 34872482315e..c22d8c28ad84 100644
--- a/kernel/debug/gdbstub.c
+++ b/kernel/debug/gdbstub.c
@@ -217,7 +217,7 @@ void gdbstub_msg_write(const char *s, int len)
/* Pack in hex chars */
for (i = 0; i < wcount; i++)
- bufptr = pack_hex_byte(bufptr, s[i]);
+ bufptr = hex_byte_pack(bufptr, s[i]);
*bufptr = '\0';
/* Move up */
@@ -249,7 +249,7 @@ char *kgdb_mem2hex(char *mem, char *buf, int count)
if (err)
return NULL;
while (count > 0) {
- buf = pack_hex_byte(buf, *tmp);
+ buf = hex_byte_pack(buf, *tmp);
tmp++;
count--;
}
@@ -411,14 +411,14 @@ static char *pack_threadid(char *pkt, unsigned char *id)
limit = id + (BUF_THREAD_ID_SIZE / 2);
while (id < limit) {
if (!lzero || *id != 0) {
- pkt = pack_hex_byte(pkt, *id);
+ pkt = hex_byte_pack(pkt, *id);
lzero = 0;
}
id++;
}
if (lzero)
- pkt = pack_hex_byte(pkt, 0);
+ pkt = hex_byte_pack(pkt, 0);
return pkt;
}
@@ -486,7 +486,7 @@ static void gdb_cmd_status(struct kgdb_state *ks)
dbg_remove_all_break();
remcom_out_buffer[0] = 'S';
- pack_hex_byte(&remcom_out_buffer[1], ks->signo);
+ hex_byte_pack(&remcom_out_buffer[1], ks->signo);
}
static void gdb_get_regs_helper(struct kgdb_state *ks)
@@ -954,7 +954,7 @@ int gdb_serial_stub(struct kgdb_state *ks)
/* Reply to host that an exception has occurred */
ptr = remcom_out_buffer;
*ptr++ = 'T';
- ptr = pack_hex_byte(ptr, ks->signo);
+ ptr = hex_byte_pack(ptr, ks->signo);
ptr += strlen(strcpy(ptr, "thread:"));
int_to_threadref(thref, shadow_pid(current->pid));
ptr = pack_threadid(ptr, thref);
diff --git a/kernel/events/core.c b/kernel/events/core.c
index d1a1bee35228..12a0287e0358 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3544,7 +3544,7 @@ static void perf_mmap_close(struct vm_area_struct *vma)
struct ring_buffer *rb = event->rb;
atomic_long_sub((size >> PAGE_SHIFT) + 1, &user->locked_vm);
- vma->vm_mm->locked_vm -= event->mmap_locked;
+ vma->vm_mm->pinned_vm -= event->mmap_locked;
rcu_assign_pointer(event->rb, NULL);
mutex_unlock(&event->mmap_mutex);
@@ -3625,7 +3625,7 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
lock_limit = rlimit(RLIMIT_MEMLOCK);
lock_limit >>= PAGE_SHIFT;
- locked = vma->vm_mm->locked_vm + extra;
+ locked = vma->vm_mm->pinned_vm + extra;
if ((locked > lock_limit) && perf_paranoid_tracepoint_raw() &&
!capable(CAP_IPC_LOCK)) {
@@ -3651,7 +3651,7 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
atomic_long_add(user_extra, &user->locked_vm);
event->mmap_locked = extra;
event->mmap_user = get_current_user();
- vma->vm_mm->locked_vm += event->mmap_locked;
+ vma->vm_mm->pinned_vm += event->mmap_locked;
unlock:
if (!ret)
diff --git a/kernel/exit.c b/kernel/exit.c
index 2913b3509d42..d0b7d988f873 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -681,8 +681,6 @@ static void exit_mm(struct task_struct * tsk)
enter_lazy_tlb(mm, current);
/* We don't want this task to be frozen prematurely */
clear_freeze_flag(tsk);
- if (tsk->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
- atomic_dec(&mm->oom_disable_count);
task_unlock(tsk);
mm_update_next_owner(mm);
mmput(mm);
diff --git a/kernel/fork.c b/kernel/fork.c
index 8e6b6f4fb272..70d76191afb9 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -501,7 +501,6 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
mm->cached_hole_size = ~0UL;
mm_init_aio(mm);
mm_init_owner(mm, p);
- atomic_set(&mm->oom_disable_count, 0);
if (likely(!mm_alloc_pgd(mm))) {
mm->def_flags = 0;
@@ -816,8 +815,6 @@ good_mm:
/* Initializing for Swap token stuff */
mm->token_priority = 0;
mm->last_interval = 0;
- if (tsk->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
- atomic_inc(&mm->oom_disable_count);
tsk->mm = mm;
tsk->active_mm = mm;
@@ -1391,13 +1388,8 @@ bad_fork_cleanup_io:
bad_fork_cleanup_namespaces:
exit_task_namespaces(p);
bad_fork_cleanup_mm:
- if (p->mm) {
- task_lock(p);
- if (p->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
- atomic_dec(&p->mm->oom_disable_count);
- task_unlock(p);
+ if (p->mm)
mmput(p->mm);
- }
bad_fork_cleanup_signal:
if (!(clone_flags & CLONE_THREAD))
free_signal_struct(p->signal);
diff --git a/kernel/printk.c b/kernel/printk.c
index b7da18391c38..1455a0d4eedd 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -532,6 +532,9 @@ static int __init ignore_loglevel_setup(char *str)
}
early_param("ignore_loglevel", ignore_loglevel_setup);
+module_param_named(ignore_loglevel, ignore_loglevel, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(ignore_loglevel, "ignore loglevel setting, to"
+ "print all kernel messages to the console.");
/*
* Write out chars from start to end - 1 inclusive
@@ -592,9 +595,6 @@ static size_t log_prefix(const char *p, unsigned int *level, char *special)
/* multi digit including the level and facility number */
char *endp = NULL;
- if (p[1] < '0' && p[1] > '9')
- return 0;
-
lev = (simple_strtoul(&p[1], &endp, 10) & 7);
if (endp == NULL || endp[0] != '>')
return 0;
@@ -1108,6 +1108,10 @@ static int __init console_suspend_disable(char *str)
return 1;
}
__setup("no_console_suspend", console_suspend_disable);
+module_param_named(console_suspend, console_suspend_enabled,
+ bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(console_suspend, "suspend console during suspend"
+ " and hibernate operations");
/**
* suspend_console - suspend the console subsystem
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index ba5070ce5765..5b0951aa0496 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -41,6 +41,7 @@ struct cpu_stopper {
};
static DEFINE_PER_CPU(struct cpu_stopper, cpu_stopper);
+static bool stop_machine_initialized = false;
static void cpu_stop_init_done(struct cpu_stop_done *done, unsigned int nr_todo)
{
@@ -386,6 +387,8 @@ static int __init cpu_stop_init(void)
cpu_stop_cpu_callback(&cpu_stop_cpu_notifier, CPU_ONLINE, bcpu);
register_cpu_notifier(&cpu_stop_cpu_notifier);
+ stop_machine_initialized = true;
+
return 0;
}
early_initcall(cpu_stop_init);
@@ -485,6 +488,25 @@ int __stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus)
.num_threads = num_online_cpus(),
.active_cpus = cpus };
+ if (!stop_machine_initialized) {
+ /*
+ * Handle the case where stop_machine() is called
+ * early in boot before stop_machine() has been
+ * initialized.
+ */
+ unsigned long flags;
+ int ret;
+
+ WARN_ON_ONCE(smdata.num_threads != 1);
+
+ local_irq_save(flags);
+ hard_irq_disable();
+ ret = (*fn)(data);
+ local_irq_restore(flags);
+
+ return ret;
+ }
+
/* Set the initial state and stop all online cpus. */
set_state(&smdata, STOPMACHINE_PREPARE);
return stop_cpus(cpu_online_mask, stop_machine_cpu_stop, &smdata);
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index a9a5de07c4f1..47bfa16430d7 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -145,6 +145,10 @@ cond_syscall(sys_io_submit);
cond_syscall(sys_io_cancel);
cond_syscall(sys_io_getevents);
cond_syscall(sys_syslog);
+cond_syscall(sys_process_vm_readv);
+cond_syscall(sys_process_vm_writev);
+cond_syscall(compat_sys_process_vm_readv);
+cond_syscall(compat_sys_process_vm_writev);
/* arch-specific weak syscall entries */
cond_syscall(sys_pciconfig_read);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 2fe2bc2a57ea..ae2719643854 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -57,6 +57,7 @@
#include <linux/pipe_fs_i.h>
#include <linux/oom.h>
#include <linux/kmod.h>
+#include <linux/capability.h>
#include <asm/uaccess.h>
#include <asm/processor.h>
@@ -134,6 +135,7 @@ static int minolduid;
static int min_percpu_pagelist_fract = 8;
static int ngroups_max = NGROUPS_MAX;
+static const int cap_last_cap = CAP_LAST_CAP;
#ifdef CONFIG_INOTIFY_USER
#include <linux/inotify.h>
@@ -732,6 +734,13 @@ static struct ctl_table kern_table[] = {
.mode = 0444,
.proc_handler = proc_dointvec,
},
+ {
+ .procname = "cap_last_cap",
+ .data = (void *)&cap_last_cap,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ },
#if defined(CONFIG_LOCKUP_DETECTOR)
{
.procname = "watchdog",
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index d680381b0e9c..1d7bca7f4f52 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -481,6 +481,8 @@ static void watchdog_disable(int cpu)
}
}
+/* sysctl functions */
+#ifdef CONFIG_SYSCTL
static void watchdog_enable_all_cpus(void)
{
int cpu;
@@ -510,8 +512,6 @@ static void watchdog_disable_all_cpus(void)
}
-/* sysctl functions */
-#ifdef CONFIG_SYSCTL
/*
* proc handler for /proc/sys/kernel/nmi_watchdog,watchdog_thresh
*/