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authorLinus Torvalds <torvalds@linux-foundation.org>2013-03-22 16:41:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-03-22 16:41:44 -0700
commit14629ed31467741d12f342c95621900646173519 (patch)
tree2213913ecb569a9b386cac11dbe0aac37911d97f
parentb9cb3bf42efc2faa55e815f4368738978536c6d1 (diff)
parent38d78e587d4960d0db94add518d27ee74bad2301 (diff)
downloadconfigs-14629ed31467741d12f342c95621900646173519.tar.gz
Merge branch 'akpm' (fixes from Andrew)
Merge misc fixes from Andrew Morton. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mqueue: sys_mq_open: do not call mnt_drop_write() if read-only mm/hotplug: only free wait_table if it's allocated by vmalloc dma-debug: update DMA debug API to better handle multiple mappings of a buffer dma-debug: fix locking bug in check_unmap() drivers/rtc/rtc-at91rm9200.c: use a variable for storing IMR drivers/video/ep93xx-fb.c: include <linux/io.h> for devm_ioremap() drivers/rtc/rtc-da9052.c: fix for rtc device registration mm: zone_end_pfn is too small poweroff: change orderly_poweroff() to use schedule_work() mm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting printk: Provide a wake_up_klogd() off-case irq_work.h: fix warning when CONFIG_IRQ_WORK=n
-rw-r--r--drivers/rtc/rtc-at91rm9200.c50
-rw-r--r--drivers/rtc/rtc-at91rm9200.h1
-rw-r--r--drivers/rtc/rtc-da9052.c8
-rw-r--r--drivers/video/ep93xx-fb.c1
-rw-r--r--include/linux/irq_work.h2
-rw-r--r--include/linux/kernel.h1
-rw-r--r--include/linux/mmzone.h2
-rw-r--r--include/linux/printk.h6
-rw-r--r--ipc/mqueue.c3
-rw-r--r--kernel/printk.c80
-rw-r--r--kernel/sys.c57
-rw-r--r--lib/bust_spinlocks.c3
-rw-r--r--lib/dma-debug.c45
-rw-r--r--mm/hugetlb.c8
-rw-r--r--mm/memory_hotplug.c6
15 files changed, 159 insertions, 114 deletions
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 434ebc3a99d..0a9f27e094e 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -44,6 +44,7 @@ static DECLARE_COMPLETION(at91_rtc_updated);
static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
static void __iomem *at91_rtc_regs;
static int irq;
+static u32 at91_rtc_imr;
/*
* Decode time/date into rtc_time structure
@@ -108,9 +109,11 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
cr = at91_rtc_read(AT91_RTC_CR);
at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM);
+ at91_rtc_imr |= AT91_RTC_ACKUPD;
at91_rtc_write(AT91_RTC_IER, AT91_RTC_ACKUPD);
wait_for_completion(&at91_rtc_updated); /* wait for ACKUPD interrupt */
at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD);
+ at91_rtc_imr &= ~AT91_RTC_ACKUPD;
at91_rtc_write(AT91_RTC_TIMR,
bin2bcd(tm->tm_sec) << 0
@@ -142,7 +145,7 @@ static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
tm->tm_year = at91_alarm_year - 1900;
- alrm->enabled = (at91_rtc_read(AT91_RTC_IMR) & AT91_RTC_ALARM)
+ alrm->enabled = (at91_rtc_imr & AT91_RTC_ALARM)
? 1 : 0;
dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
@@ -168,6 +171,7 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
tm.tm_sec = alrm->time.tm_sec;
at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
+ at91_rtc_imr &= ~AT91_RTC_ALARM;
at91_rtc_write(AT91_RTC_TIMALR,
bin2bcd(tm.tm_sec) << 0
| bin2bcd(tm.tm_min) << 8
@@ -180,6 +184,7 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
if (alrm->enabled) {
at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
+ at91_rtc_imr |= AT91_RTC_ALARM;
at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
}
@@ -196,9 +201,12 @@ static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
if (enabled) {
at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
+ at91_rtc_imr |= AT91_RTC_ALARM;
at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
- } else
+ } else {
at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
+ at91_rtc_imr &= ~AT91_RTC_ALARM;
+ }
return 0;
}
@@ -207,12 +215,10 @@ static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
*/
static int at91_rtc_proc(struct device *dev, struct seq_file *seq)
{
- unsigned long imr = at91_rtc_read(AT91_RTC_IMR);
-
seq_printf(seq, "update_IRQ\t: %s\n",
- (imr & AT91_RTC_ACKUPD) ? "yes" : "no");
+ (at91_rtc_imr & AT91_RTC_ACKUPD) ? "yes" : "no");
seq_printf(seq, "periodic_IRQ\t: %s\n",
- (imr & AT91_RTC_SECEV) ? "yes" : "no");
+ (at91_rtc_imr & AT91_RTC_SECEV) ? "yes" : "no");
return 0;
}
@@ -227,7 +233,7 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
unsigned int rtsr;
unsigned long events = 0;
- rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read(AT91_RTC_IMR);
+ rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_imr;
if (rtsr) { /* this interrupt is shared! Is it ours? */
if (rtsr & AT91_RTC_ALARM)
events |= (RTC_AF | RTC_IRQF);
@@ -291,6 +297,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
AT91_RTC_SECEV | AT91_RTC_TIMEV |
AT91_RTC_CALEV);
+ at91_rtc_imr = 0;
ret = request_irq(irq, at91_rtc_interrupt,
IRQF_SHARED,
@@ -329,6 +336,7 @@ static int __exit at91_rtc_remove(struct platform_device *pdev)
at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
AT91_RTC_SECEV | AT91_RTC_TIMEV |
AT91_RTC_CALEV);
+ at91_rtc_imr = 0;
free_irq(irq, pdev);
rtc_device_unregister(rtc);
@@ -341,31 +349,35 @@ static int __exit at91_rtc_remove(struct platform_device *pdev)
/* AT91RM9200 RTC Power management control */
-static u32 at91_rtc_imr;
+static u32 at91_rtc_bkpimr;
+
static int at91_rtc_suspend(struct device *dev)
{
/* this IRQ is shared with DBGU and other hardware which isn't
* necessarily doing PM like we are...
*/
- at91_rtc_imr = at91_rtc_read(AT91_RTC_IMR)
- & (AT91_RTC_ALARM|AT91_RTC_SECEV);
- if (at91_rtc_imr) {
- if (device_may_wakeup(dev))
+ at91_rtc_bkpimr = at91_rtc_imr & (AT91_RTC_ALARM|AT91_RTC_SECEV);
+ if (at91_rtc_bkpimr) {
+ if (device_may_wakeup(dev)) {
enable_irq_wake(irq);
- else
- at91_rtc_write(AT91_RTC_IDR, at91_rtc_imr);
- }
+ } else {
+ at91_rtc_write(AT91_RTC_IDR, at91_rtc_bkpimr);
+ at91_rtc_imr &= ~at91_rtc_bkpimr;
+ }
+}
return 0;
}
static int at91_rtc_resume(struct device *dev)
{
- if (at91_rtc_imr) {
- if (device_may_wakeup(dev))
+ if (at91_rtc_bkpimr) {
+ if (device_may_wakeup(dev)) {
disable_irq_wake(irq);
- else
- at91_rtc_write(AT91_RTC_IER, at91_rtc_imr);
+ } else {
+ at91_rtc_imr |= at91_rtc_bkpimr;
+ at91_rtc_write(AT91_RTC_IER, at91_rtc_bkpimr);
+ }
}
return 0;
}
diff --git a/drivers/rtc/rtc-at91rm9200.h b/drivers/rtc/rtc-at91rm9200.h
index da1945e5f71..5f940b6844c 100644
--- a/drivers/rtc/rtc-at91rm9200.h
+++ b/drivers/rtc/rtc-at91rm9200.h
@@ -64,7 +64,6 @@
#define AT91_RTC_SCCR 0x1c /* Status Clear Command Register */
#define AT91_RTC_IER 0x20 /* Interrupt Enable Register */
#define AT91_RTC_IDR 0x24 /* Interrupt Disable Register */
-#define AT91_RTC_IMR 0x28 /* Interrupt Mask Register */
#define AT91_RTC_VER 0x2c /* Valid Entry Register */
#define AT91_RTC_NVTIM (1 << 0) /* Non valid Time */
diff --git a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c
index 0dde688ca09..969abbad7fe 100644
--- a/drivers/rtc/rtc-da9052.c
+++ b/drivers/rtc/rtc-da9052.c
@@ -239,11 +239,9 @@ static int da9052_rtc_probe(struct platform_device *pdev)
rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
platform_set_drvdata(pdev, rtc);
- rtc->irq = platform_get_irq_byname(pdev, "ALM");
- ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL,
- da9052_rtc_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
- "ALM", rtc);
+ rtc->irq = DA9052_IRQ_ALARM;
+ ret = da9052_request_irq(rtc->da9052, rtc->irq, "ALM",
+ da9052_rtc_irq, rtc);
if (ret != 0) {
rtc_err(rtc->da9052, "irq registration failed: %d\n", ret);
return ret;
diff --git a/drivers/video/ep93xx-fb.c b/drivers/video/ep93xx-fb.c
index 3f2519d3071..e06cd5d90c9 100644
--- a/drivers/video/ep93xx-fb.c
+++ b/drivers/video/ep93xx-fb.c
@@ -23,6 +23,7 @@
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/fb.h>
+#include <linux/io.h>
#include <linux/platform_data/video-ep93xx.h>
diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h
index f5dbce50466..66017028dcb 100644
--- a/include/linux/irq_work.h
+++ b/include/linux/irq_work.h
@@ -37,7 +37,7 @@ void irq_work_sync(struct irq_work *work);
#ifdef CONFIG_IRQ_WORK
bool irq_work_needs_cpu(void);
#else
-static bool irq_work_needs_cpu(void) { return false; }
+static inline bool irq_work_needs_cpu(void) { return false; }
#endif
#endif /* _LINUX_IRQ_WORK_H */
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 80d36874689..79fdd80a42d 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -390,7 +390,6 @@ extern struct pid *session_of_pgrp(struct pid *pgrp);
unsigned long int_sqrt(unsigned long);
extern void bust_spinlocks(int yes);
-extern void wake_up_klogd(void);
extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
extern int panic_timeout;
extern int panic_on_oops;
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ede274957e0..c74092eebf5 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -527,7 +527,7 @@ static inline int zone_is_oom_locked(const struct zone *zone)
return test_bit(ZONE_OOM_LOCKED, &zone->flags);
}
-static inline unsigned zone_end_pfn(const struct zone *zone)
+static inline unsigned long zone_end_pfn(const struct zone *zone)
{
return zone->zone_start_pfn + zone->spanned_pages;
}
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 1249a54d17e..822171fcb1c 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -134,6 +134,8 @@ extern int printk_delay_msec;
extern int dmesg_restrict;
extern int kptr_restrict;
+extern void wake_up_klogd(void);
+
void log_buf_kexec_setup(void);
void __init setup_log_buf(int early);
#else
@@ -162,6 +164,10 @@ static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
return false;
}
+static inline void wake_up_klogd(void)
+{
+}
+
static inline void log_buf_kexec_setup(void)
{
}
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index e5c4f609f22..3953fda2e8b 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -840,7 +840,8 @@ out_putfd:
fd = error;
}
mutex_unlock(&root->d_inode->i_mutex);
- mnt_drop_write(mnt);
+ if (!ro)
+ mnt_drop_write(mnt);
out_putname:
putname(name);
return fd;
diff --git a/kernel/printk.c b/kernel/printk.c
index 0b31715f335..abbdd9e2ac8 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -63,8 +63,6 @@ void asmlinkage __attribute__((weak)) early_printk(const char *fmt, ...)
#define MINIMUM_CONSOLE_LOGLEVEL 1 /* Minimum loglevel we let people use */
#define DEFAULT_CONSOLE_LOGLEVEL 7 /* anything MORE serious than KERN_DEBUG */
-DECLARE_WAIT_QUEUE_HEAD(log_wait);
-
int console_printk[4] = {
DEFAULT_CONSOLE_LOGLEVEL, /* console_loglevel */
DEFAULT_MESSAGE_LOGLEVEL, /* default_message_loglevel */
@@ -224,6 +222,7 @@ struct log {
static DEFINE_RAW_SPINLOCK(logbuf_lock);
#ifdef CONFIG_PRINTK
+DECLARE_WAIT_QUEUE_HEAD(log_wait);
/* the next printk record to read by syslog(READ) or /proc/kmsg */
static u64 syslog_seq;
static u32 syslog_idx;
@@ -1957,45 +1956,6 @@ int is_console_locked(void)
return console_locked;
}
-/*
- * Delayed printk version, for scheduler-internal messages:
- */
-#define PRINTK_BUF_SIZE 512
-
-#define PRINTK_PENDING_WAKEUP 0x01
-#define PRINTK_PENDING_SCHED 0x02
-
-static DEFINE_PER_CPU(int, printk_pending);
-static DEFINE_PER_CPU(char [PRINTK_BUF_SIZE], printk_sched_buf);
-
-static void wake_up_klogd_work_func(struct irq_work *irq_work)
-{
- int pending = __this_cpu_xchg(printk_pending, 0);
-
- if (pending & PRINTK_PENDING_SCHED) {
- char *buf = __get_cpu_var(printk_sched_buf);
- printk(KERN_WARNING "[sched_delayed] %s", buf);
- }
-
- if (pending & PRINTK_PENDING_WAKEUP)
- wake_up_interruptible(&log_wait);
-}
-
-static DEFINE_PER_CPU(struct irq_work, wake_up_klogd_work) = {
- .func = wake_up_klogd_work_func,
- .flags = IRQ_WORK_LAZY,
-};
-
-void wake_up_klogd(void)
-{
- preempt_disable();
- if (waitqueue_active(&log_wait)) {
- this_cpu_or(printk_pending, PRINTK_PENDING_WAKEUP);
- irq_work_queue(&__get_cpu_var(wake_up_klogd_work));
- }
- preempt_enable();
-}
-
static void console_cont_flush(char *text, size_t size)
{
unsigned long flags;
@@ -2458,6 +2418,44 @@ static int __init printk_late_init(void)
late_initcall(printk_late_init);
#if defined CONFIG_PRINTK
+/*
+ * Delayed printk version, for scheduler-internal messages:
+ */
+#define PRINTK_BUF_SIZE 512
+
+#define PRINTK_PENDING_WAKEUP 0x01
+#define PRINTK_PENDING_SCHED 0x02
+
+static DEFINE_PER_CPU(int, printk_pending);
+static DEFINE_PER_CPU(char [PRINTK_BUF_SIZE], printk_sched_buf);
+
+static void wake_up_klogd_work_func(struct irq_work *irq_work)
+{
+ int pending = __this_cpu_xchg(printk_pending, 0);
+
+ if (pending & PRINTK_PENDING_SCHED) {
+ char *buf = __get_cpu_var(printk_sched_buf);
+ printk(KERN_WARNING "[sched_delayed] %s", buf);
+ }
+
+ if (pending & PRINTK_PENDING_WAKEUP)
+ wake_up_interruptible(&log_wait);
+}
+
+static DEFINE_PER_CPU(struct irq_work, wake_up_klogd_work) = {
+ .func = wake_up_klogd_work_func,
+ .flags = IRQ_WORK_LAZY,
+};
+
+void wake_up_klogd(void)
+{
+ preempt_disable();
+ if (waitqueue_active(&log_wait)) {
+ this_cpu_or(printk_pending, PRINTK_PENDING_WAKEUP);
+ irq_work_queue(&__get_cpu_var(wake_up_klogd_work));
+ }
+ preempt_enable();
+}
int printk_sched(const char *fmt, ...)
{
diff --git a/kernel/sys.c b/kernel/sys.c
index 81f56445fba..39c9c4a2949 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2185,9 +2185,8 @@ SYSCALL_DEFINE3(getcpu, unsigned __user *, cpup, unsigned __user *, nodep,
char poweroff_cmd[POWEROFF_CMD_PATH_LEN] = "/sbin/poweroff";
-static int __orderly_poweroff(void)
+static int __orderly_poweroff(bool force)
{
- int argc;
char **argv;
static char *envp[] = {
"HOME=/",
@@ -2196,20 +2195,40 @@ static int __orderly_poweroff(void)
};
int ret;
- argv = argv_split(GFP_ATOMIC, poweroff_cmd, &argc);
- if (argv == NULL) {
+ argv = argv_split(GFP_KERNEL, poweroff_cmd, NULL);
+ if (argv) {
+ ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
+ argv_free(argv);
+ } else {
printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
- __func__, poweroff_cmd);
- return -ENOMEM;
+ __func__, poweroff_cmd);
+ ret = -ENOMEM;
}
- ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_WAIT_EXEC,
- NULL, NULL, NULL);
- argv_free(argv);
+ if (ret && force) {
+ printk(KERN_WARNING "Failed to start orderly shutdown: "
+ "forcing the issue\n");
+ /*
+ * I guess this should try to kick off some daemon to sync and
+ * poweroff asap. Or not even bother syncing if we're doing an
+ * emergency shutdown?
+ */
+ emergency_sync();
+ kernel_power_off();
+ }
return ret;
}
+static bool poweroff_force;
+
+static void poweroff_work_func(struct work_struct *work)
+{
+ __orderly_poweroff(poweroff_force);
+}
+
+static DECLARE_WORK(poweroff_work, poweroff_work_func);
+
/**
* orderly_poweroff - Trigger an orderly system poweroff
* @force: force poweroff if command execution fails
@@ -2219,21 +2238,9 @@ static int __orderly_poweroff(void)
*/
int orderly_poweroff(bool force)
{
- int ret = __orderly_poweroff();
-
- if (ret && force) {
- printk(KERN_WARNING "Failed to start orderly shutdown: "
- "forcing the issue\n");
-
- /*
- * I guess this should try to kick off some daemon to sync and
- * poweroff asap. Or not even bother syncing if we're doing an
- * emergency shutdown?
- */
- emergency_sync();
- kernel_power_off();
- }
-
- return ret;
+ if (force) /* do not override the pending "true" */
+ poweroff_force = true;
+ schedule_work(&poweroff_work);
+ return 0;
}
EXPORT_SYMBOL_GPL(orderly_poweroff);
diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c
index 9681d54b95d..f8e0e536739 100644
--- a/lib/bust_spinlocks.c
+++ b/lib/bust_spinlocks.c
@@ -8,6 +8,7 @@
*/
#include <linux/kernel.h>
+#include <linux/printk.h>
#include <linux/spinlock.h>
#include <linux/tty.h>
#include <linux/wait.h>
@@ -28,5 +29,3 @@ void __attribute__((weak)) bust_spinlocks(int yes)
wake_up_klogd();
}
}
-
-
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 5e396accd3d..d87a17a819d 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -862,17 +862,21 @@ static void check_unmap(struct dma_debug_entry *ref)
entry = bucket_find_exact(bucket, ref);
if (!entry) {
+ /* must drop lock before calling dma_mapping_error */
+ put_hash_bucket(bucket, &flags);
+
if (dma_mapping_error(ref->dev, ref->dev_addr)) {
err_printk(ref->dev, NULL,
- "DMA-API: device driver tries "
- "to free an invalid DMA memory address\n");
- return;
+ "DMA-API: device driver tries to free an "
+ "invalid DMA memory address\n");
+ } else {
+ err_printk(ref->dev, NULL,
+ "DMA-API: device driver tries to free DMA "
+ "memory it has not allocated [device "
+ "address=0x%016llx] [size=%llu bytes]\n",
+ ref->dev_addr, ref->size);
}
- err_printk(ref->dev, NULL, "DMA-API: device driver tries "
- "to free DMA memory it has not allocated "
- "[device address=0x%016llx] [size=%llu bytes]\n",
- ref->dev_addr, ref->size);
- goto out;
+ return;
}
if (ref->size != entry->size) {
@@ -936,7 +940,6 @@ static void check_unmap(struct dma_debug_entry *ref)
hash_bucket_del(entry);
dma_entry_free(entry);
-out:
put_hash_bucket(bucket, &flags);
}
@@ -1082,13 +1085,27 @@ void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
ref.dev = dev;
ref.dev_addr = dma_addr;
bucket = get_hash_bucket(&ref, &flags);
- entry = bucket_find_exact(bucket, &ref);
- if (!entry)
- goto out;
+ list_for_each_entry(entry, &bucket->list, list) {
+ if (!exact_match(&ref, entry))
+ continue;
+
+ /*
+ * The same physical address can be mapped multiple
+ * times. Without a hardware IOMMU this results in the
+ * same device addresses being put into the dma-debug
+ * hash multiple times too. This can result in false
+ * positives being reported. Therefore we implement a
+ * best-fit algorithm here which updates the first entry
+ * from the hash which fits the reference value and is
+ * not currently listed as being checked.
+ */
+ if (entry->map_err_type == MAP_ERR_NOT_CHECKED) {
+ entry->map_err_type = MAP_ERR_CHECKED;
+ break;
+ }
+ }
- entry->map_err_type = MAP_ERR_CHECKED;
-out:
put_hash_bucket(bucket, &flags);
}
EXPORT_SYMBOL(debug_dma_mapping_error);
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 0a0be33bb19..ca9a7c6d7e9 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2124,8 +2124,12 @@ int hugetlb_report_node_meminfo(int nid, char *buf)
/* Return the number pages of memory we physically have, in PAGE_SIZE units. */
unsigned long hugetlb_total_pages(void)
{
- struct hstate *h = &default_hstate;
- return h->nr_huge_pages * pages_per_huge_page(h);
+ struct hstate *h;
+ unsigned long nr_total_pages = 0;
+
+ for_each_hstate(h)
+ nr_total_pages += h->nr_huge_pages * pages_per_huge_page(h);
+ return nr_total_pages;
}
static int hugetlb_acct_memory(struct hstate *h, long delta)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 9597eec8239..ee376576081 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1779,7 +1779,11 @@ void try_offline_node(int nid)
for (i = 0; i < MAX_NR_ZONES; i++) {
struct zone *zone = pgdat->node_zones + i;
- if (zone->wait_table)
+ /*
+ * wait_table may be allocated from boot memory,
+ * here only free if it's allocated by vmalloc.
+ */
+ if (is_vmalloc_addr(zone->wait_table))
vfree(zone->wait_table);
}