---

yaml --- r: 40091 b: refs/heads/master c: f1877fb h: refs/heads/master i: 40089: 9a2c0a8 40087: 7e3ced3 v: v3
git-mirror · Oct 20, 2006 · 4ec1360 · 4ec1360
1 parent ce43432
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diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d89e36d8df547fde2beaea82211954868da2282d
+refs/heads/master: f1877fb2967ec8c0c6e946cc24c253bb52ce4d06
diff --git a/trunk/Documentation/cpu-hotplug.txt b/trunk/Documentation/cpu-hotplug.txt
@@ -46,7 +46,7 @@ maxcpus=n    Restrict boot time cpus to n. Say if you have 4 cpus, using
              maxcpus=2 will only boot 2. You can choose to bring the
              other cpus later online, read FAQ's for more info.
 
-additional_cpus*=n	Use this to limit hotpluggable cpus. This option sets
+additional_cpus=n (*)	Use this to limit hotpluggable cpus. This option sets
   			cpu_possible_map = cpu_present_map + additional_cpus
 
 (*) Option valid only for following architectures
@@ -101,15 +101,15 @@ cpu_possible_map/for_each_possible_cpu() to iterate.
 
 Never use anything other than cpumask_t to represent bitmap of CPUs.
 
-#include <linux/cpumask.h>
+	#include <linux/cpumask.h>
 
-for_each_possible_cpu     - Iterate over cpu_possible_map
-for_each_online_cpu       - Iterate over cpu_online_map
-for_each_present_cpu      - Iterate over cpu_present_map
-for_each_cpu_mask(x,mask) - Iterate over some random collection of cpu mask.
+	for_each_possible_cpu     - Iterate over cpu_possible_map
+	for_each_online_cpu       - Iterate over cpu_online_map
+	for_each_present_cpu      - Iterate over cpu_present_map
+	for_each_cpu_mask(x,mask) - Iterate over some random collection of cpu mask.
 
-#include <linux/cpu.h>
-lock_cpu_hotplug() and unlock_cpu_hotplug():
+	#include <linux/cpu.h>
+	lock_cpu_hotplug() and unlock_cpu_hotplug():
 
 The above calls are used to inhibit cpu hotplug operations. While holding the
 cpucontrol mutex, cpu_online_map will not change. If you merely need to avoid
@@ -120,7 +120,7 @@ will work as long as stop_machine_run() is used to take a cpu down.
 
 CPU Hotplug - Frequently Asked Questions.
 
-Q: How to i enable my kernel to support CPU hotplug?
+Q: How to enable my kernel to support CPU hotplug?
 A: When doing make defconfig, Enable CPU hotplug support
 
    "Processor type and Features" -> Support for Hotpluggable CPUs
@@ -141,57 +141,57 @@ A: You should now notice an entry in sysfs.
 Check if sysfs is mounted, using the "mount" command. You should notice
 an entry as shown below in the output.
 
-....
-none on /sys type sysfs (rw)
-....
+	....
+	none on /sys type sysfs (rw)
+	....
 
-if this is not mounted, do the following.
+If this is not mounted, do the following.
 
-#mkdir /sysfs
-#mount -t sysfs sys /sys
+	 #mkdir /sysfs
+	#mount -t sysfs sys /sys
 
-now you should see entries for all present cpu, the following is an example
+Now you should see entries for all present cpu, the following is an example
 in a 8-way system.
 
-#pwd
-#/sys/devices/system/cpu
-#ls -l
-total 0
-drwxr-xr-x  10 root root 0 Sep 19 07:44 .
-drwxr-xr-x  13 root root 0 Sep 19 07:45 ..
-drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu0
-drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu1
-drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu2
-drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu3
-drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu4
-drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu5
-drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu6
-drwxr-xr-x   3 root root 0 Sep 19 07:48 cpu7
+	#pwd
+	#/sys/devices/system/cpu
+	#ls -l
+	total 0
+	drwxr-xr-x  10 root root 0 Sep 19 07:44 .
+	drwxr-xr-x  13 root root 0 Sep 19 07:45 ..
+	drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu0
+	drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu1
+	drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu2
+	drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu3
+	drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu4
+	drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu5
+	drwxr-xr-x   3 root root 0 Sep 19 07:44 cpu6
+	drwxr-xr-x   3 root root 0 Sep 19 07:48 cpu7
 
 Under each directory you would find an "online" file which is the control
 file to logically online/offline a processor.
 
 Q: Does hot-add/hot-remove refer to physical add/remove of cpus?
 A: The usage of hot-add/remove may not be very consistently used in the code.
-CONFIG_CPU_HOTPLUG enables logical online/offline capability in the kernel.
+CONFIG_HOTPLUG_CPU enables logical online/offline capability in the kernel.
 To support physical addition/removal, one would need some BIOS hooks and
 the platform should have something like an attention button in PCI hotplug.
 CONFIG_ACPI_HOTPLUG_CPU enables ACPI support for physical add/remove of CPUs.
 
 Q: How do i logically offline a CPU?
 A: Do the following.
 
-#echo 0 > /sys/devices/system/cpu/cpuX/online
+	#echo 0 > /sys/devices/system/cpu/cpuX/online
 
-once the logical offline is successful, check
+Once the logical offline is successful, check
 
-#cat /proc/interrupts
+	#cat /proc/interrupts
 
-you should now not see the CPU that you removed. Also online file will report
+You should now not see the CPU that you removed. Also online file will report
 the state as 0 when a cpu if offline and 1 when its online.
 
-#To display the current cpu state.
-#cat /sys/devices/system/cpu/cpuX/online
+	#To display the current cpu state.
+	#cat /sys/devices/system/cpu/cpuX/online
 
 Q: Why cant i remove CPU0 on some systems?
 A: Some architectures may have some special dependency on a certain CPU.
@@ -234,8 +234,8 @@ Q: If i have some kernel code that needs to be aware of CPU arrival and
    departure, how to i arrange for proper notification?
 A: This is what you would need in your kernel code to receive notifications.
 
-    #include <linux/cpu.h>
-    static int __cpuinit foobar_cpu_callback(struct notifier_block *nfb,
+	#include <linux/cpu.h>
+	static int __cpuinit foobar_cpu_callback(struct notifier_block *nfb,
 					    unsigned long action, void *hcpu)
 	{
 		unsigned int cpu = (unsigned long)hcpu;
@@ -279,10 +279,10 @@ Q: I don't see my action being called for all CPUs already up and running?
 A: Yes, CPU notifiers are called only when new CPUs are on-lined or offlined.
    If you need to perform some action for each cpu already in the system, then
 
-  for_each_online_cpu(i) {
+	for_each_online_cpu(i) {
 		foobar_cpu_callback(&foobar_cpu_notifier, CPU_UP_PREPARE, i);
-		foobar_cpu_callback(&foobar-cpu_notifier, CPU_ONLINE, i);
-  }
+		foobar_cpu_callback(&foobar_cpu_notifier, CPU_ONLINE, i);
+	}
 
 Q: If i would like to develop cpu hotplug support for a new architecture,
    what do i need at a minimum?
@@ -307,38 +307,38 @@ Q: I need to ensure that a particular cpu is not removed when there is some
    work specific to this cpu is in progress.
 A: First switch the current thread context to preferred cpu
 
-   int my_func_on_cpu(int cpu)
-   {
-       cpumask_t saved_mask, new_mask = CPU_MASK_NONE;
-       int curr_cpu, err = 0;
-
-       saved_mask = current->cpus_allowed;
-       cpu_set(cpu, new_mask);
-       err = set_cpus_allowed(current, new_mask);
-
-       if (err)
-           return err;
-
-       /*
-        * If we got scheduled out just after the return from
-        * set_cpus_allowed() before running the work, this ensures
-        * we stay locked.
-        */
-       curr_cpu = get_cpu();
-
-       if (curr_cpu != cpu) {
-	   err = -EAGAIN;
-           goto ret;
-       } else {
-       	   /*
-	    * Do work : But cant sleep, since get_cpu() disables preempt
-	    */
-       }
-    ret:
-    	put_cpu();
-	set_cpus_allowed(current, saved_mask);
-	return err;
-    }
+	int my_func_on_cpu(int cpu)
+	{
+		cpumask_t saved_mask, new_mask = CPU_MASK_NONE;
+		int curr_cpu, err = 0;
+
+		saved_mask = current->cpus_allowed;
+		cpu_set(cpu, new_mask);
+		err = set_cpus_allowed(current, new_mask);
+
+		if (err)
+			return err;
+
+		/*
+		 * If we got scheduled out just after the return from
+		 * set_cpus_allowed() before running the work, this ensures
+		 * we stay locked.
+		 */
+		curr_cpu = get_cpu();
+
+		if (curr_cpu != cpu) {
+			err = -EAGAIN;
+			goto ret;
+		} else {
+			/*
+			 * Do work : But cant sleep, since get_cpu() disables preempt
+			 */
+		}
+		ret:
+			put_cpu();
+			set_cpus_allowed(current, saved_mask);
+			return err;
+		}
 
 
 Q: How do we determine how many CPUs are available for hotplug.

diff --git a/trunk/Documentation/memory-barriers.txt b/trunk/Documentation/memory-barriers.txt
@@ -1898,7 +1898,7 @@ queue before processing any further requests:
 	smp_wmb();
 	<A:modify v=2>	<C:busy>
 			<C:queue v=2>
-	p = &b;		q = p;
+	p = &v;		q = p;
 			<D:request p>
 	<B:modify p=&v>	<D:commit p=&v>
 		  	<D:read p>

diff --git a/trunk/arch/arm/mach-lh7a40x/common.h b/trunk/arch/arm/mach-lh7a40x/common.h
@@ -15,4 +15,4 @@ extern void lh7a404_init_irq (void);
 extern void lh7a40x_clcd_init (void);
 extern void lh7a40x_init_board_irq (void);
 
-#define IRQ_DISPATCH(irq) desc_handle_irq((irq),(irq_desc + irq), regs)
+#define IRQ_DISPATCH(irq) desc_handle_irq((irq),(irq_desc + irq))
diff --git a/trunk/arch/i386/kernel/alternative.c b/trunk/arch/i386/kernel/alternative.c
@@ -344,13 +344,16 @@ void alternatives_smp_switch(int smp)
 
 void __init alternative_instructions(void)
 {
+	unsigned long flags;
 	if (no_replacement) {
 		printk(KERN_INFO "(SMP-)alternatives turned off\n");
 		free_init_pages("SMP alternatives",
 				(unsigned long)__smp_alt_begin,
 				(unsigned long)__smp_alt_end);
 		return;
 	}
+
+	local_irq_save(flags);
 	apply_alternatives(__alt_instructions, __alt_instructions_end);
 
 	/* switch to patch-once-at-boottime-only mode and free the
@@ -386,4 +389,5 @@ void __init alternative_instructions(void)
 		alternatives_smp_switch(0);
 	}
 #endif
+	local_irq_restore(flags);
 }
diff --git a/trunk/arch/i386/lib/usercopy.c b/trunk/arch/i386/lib/usercopy.c
@@ -9,6 +9,7 @@
 #include <linux/highmem.h>
 #include <linux/blkdev.h>
 #include <linux/module.h>
+#include <linux/backing-dev.h>
 #include <asm/uaccess.h>
 #include <asm/mmx.h>
 
@@ -741,7 +742,7 @@ unsigned long __copy_to_user_ll(void __user *to, const void *from,
 
 			if (retval == -ENOMEM && is_init(current)) {
 				up_read(&current->mm->mmap_sem);
-				blk_congestion_wait(WRITE, HZ/50);
+				congestion_wait(WRITE, HZ/50);
 				goto survive;
 			}
 

diff --git a/trunk/arch/sparc64/kernel/of_device.c b/trunk/arch/sparc64/kernel/of_device.c
@@ -131,8 +131,13 @@ static int of_device_resume(struct device * dev)
 void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name)
 {
 	unsigned long ret = res->start + offset;
+	struct resource *r;
 
-	if (!request_region(ret, size, name))
+	if (res->flags & IORESOURCE_MEM)
+		r = request_mem_region(ret, size, name);
+	else
+		r = request_region(ret, size, name);
+	if (!r)
 		ret = 0;
 
 	return (void __iomem *) ret;

diff --git a/trunk/arch/sparc64/kernel/pci_sabre.c b/trunk/arch/sparc64/kernel/pci_sabre.c
@@ -1465,5 +1465,5 @@ void sabre_init(struct device_node *dp, char *model_name)
 	/*
 	 * Look for APB underneath.
 	 */
-	sabre_pbm_init(p, dp, vdma[0], vdma[1]);
+	sabre_pbm_init(p, dp, vdma[0], vdma[0] + vdma[1]);
 }
diff --git a/trunk/arch/um/Kconfig b/trunk/arch/um/Kconfig
@@ -1,3 +1,8 @@
+config DEFCONFIG_LIST
+	string
+	option defconfig_list
+	default "arch/$ARCH/defconfig"
+
 # UML uses the generic IRQ sugsystem
 config GENERIC_HARDIRQS
 	bool
@@ -52,6 +57,7 @@ menu "UML-specific options"
 config MODE_TT
 	bool "Tracing thread support (DEPRECATED)"
 	default n
+	depends on BROKEN
 	help
 	This option controls whether tracing thread support is compiled
 	into UML. This option is largely obsolete, given that skas0 provides

diff --git a/trunk/arch/um/Kconfig.char b/trunk/arch/um/Kconfig.char
@@ -190,6 +190,11 @@ config HOSTAUDIO
 	tristate
 	default UML_SOUND
 
+#It is selected elsewhere, so kconfig would warn without this.
+config HW_RANDOM
+	tristate
+	default n
+
 config UML_RANDOM
 	tristate "Hardware random number generator"
 	help

diff --git a/trunk/arch/um/drivers/cow_sys.h b/trunk/arch/um/drivers/cow_sys.h
@@ -5,6 +5,7 @@
 #include "user_util.h"
 #include "os.h"
 #include "user.h"
+#include "um_malloc.h"
 
 static inline void *cow_malloc(int size)
 {

diff --git a/trunk/arch/um/drivers/daemon_user.c b/trunk/arch/um/drivers/daemon_user.c
@@ -17,6 +17,7 @@
 #include "user_util.h"
 #include "user.h"
 #include "os.h"
+#include "um_malloc.h"
 
 #define MAX_PACKET (ETH_MAX_PACKET + ETH_HEADER_OTHER)
 

diff --git a/trunk/arch/um/drivers/fd.c b/trunk/arch/um/drivers/fd.c
@@ -12,6 +12,7 @@
 #include "user_util.h"
 #include "chan_user.h"
 #include "os.h"
+#include "um_malloc.h"
 
 struct fd_chan {
 	int fd;

diff --git a/trunk/arch/um/drivers/mcast_user.c b/trunk/arch/um/drivers/mcast_user.c
@@ -23,6 +23,7 @@
 #include "user_util.h"
 #include "user.h"
 #include "os.h"
+#include "um_malloc.h"
 
 #define MAX_PACKET (ETH_MAX_PACKET + ETH_HEADER_OTHER)
 

diff --git a/trunk/arch/um/drivers/mmapper_kern.c b/trunk/arch/um/drivers/mmapper_kern.c
@@ -95,7 +95,8 @@ static const struct file_operations mmapper_fops = {
 	.release	= mmapper_release,
 };
 
-static const struct miscdevice mmapper_dev = {
+/* No locking needed - only used (and modified) by below initcall and exitcall. */
+static struct miscdevice mmapper_dev = {
 	.minor		= MISC_DYNAMIC_MINOR,
 	.name		= "mmapper",
 	.fops		= &mmapper_fops

diff --git a/trunk/arch/um/drivers/net_user.c b/trunk/arch/um/drivers/net_user.c
@@ -18,6 +18,7 @@
 #include "kern_util.h"
 #include "net_user.h"
 #include "os.h"
+#include "um_malloc.h"
 
 int tap_open_common(void *dev, char *gate_addr)
 {

diff --git a/trunk/arch/um/drivers/pcap_user.c b/trunk/arch/um/drivers/pcap_user.c
@@ -12,6 +12,7 @@
 #include "net_user.h"
 #include "pcap_user.h"
 #include "user.h"
+#include "um_malloc.h"
 
 #define MAX_PACKET (ETH_MAX_PACKET + ETH_HEADER_OTHER)
 

diff --git a/trunk/arch/um/drivers/port_user.c b/trunk/arch/um/drivers/port_user.c
@@ -19,6 +19,7 @@
 #include "chan_user.h"
 #include "port.h"
 #include "os.h"
+#include "um_malloc.h"
 
 struct port_chan {
 	int raw;