Merge /pub/scm/linux/kernel/git/torvalds/linux-2.6

6 files changed, 113 insertions, 10 deletions

diff --git a/init/Kconfig b/init/Kconfig
index a7660ccc693..05a75c4f5ce 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -164,6 +164,7 @@ config SYSCTL
 
 config AUDIT
 	bool "Auditing support"
+	depends on NET
 	default y if SECURITY_SELINUX
 	help
 	  Enable auditing infrastructure that can be used with another
@@ -173,7 +174,7 @@ config AUDIT
 
 config AUDITSYSCALL
 	bool "Enable system-call auditing support"
-	depends on AUDIT && (X86 || PPC64 || ARCH_S390 || IA64 || UML)
+	depends on AUDIT && (X86 || PPC || PPC64 || ARCH_S390 || IA64 || UML || SPARC64)
 	default y if SECURITY_SELINUX
 	help
 	  Enable low-overhead system-call auditing infrastructure that
@@ -230,7 +231,7 @@ config CPUSETS
 	bool "Cpuset support"
 	depends on SMP
 	help
-	  This options will let you create and manage CPUSET's which
+	  This option will let you create and manage CPUSETs which
 	  allow dynamically partitioning a system into sets of CPUs and
 	  Memory Nodes and assigning tasks to run only within those sets.
 	  This is primarily useful on large SMP or NUMA systems.
diff --git a/init/calibrate.c b/init/calibrate.c
index c698e04a3db..d206c7548fe 100644
--- a/init/calibrate.c
+++ b/init/calibrate.c
@@ -8,6 +8,8 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 
+#include <asm/timex.h>
+
 static unsigned long preset_lpj;
 static int __init lpj_setup(char *str)
 {
@@ -17,6 +19,92 @@ static int __init lpj_setup(char *str)
 
 __setup("lpj=", lpj_setup);
 
+#ifdef ARCH_HAS_READ_CURRENT_TIMER
+
+/* This routine uses the read_current_timer() routine and gets the
+ * loops per jiffy directly, instead of guessing it using delay().
+ * Also, this code tries to handle non-maskable asynchronous events
+ * (like SMIs)
+ */
+#define DELAY_CALIBRATION_TICKS			((HZ < 100) ? 1 : (HZ/100))
+#define MAX_DIRECT_CALIBRATION_RETRIES		5
+
+static unsigned long __devinit calibrate_delay_direct(void)
+{
+	unsigned long pre_start, start, post_start;
+	unsigned long pre_end, end, post_end;
+	unsigned long start_jiffies;
+	unsigned long tsc_rate_min, tsc_rate_max;
+	unsigned long good_tsc_sum = 0;
+	unsigned long good_tsc_count = 0;
+	int i;
+
+	if (read_current_timer(&pre_start) < 0 )
+		return 0;
+
+	/*
+	 * A simple loop like
+	 *	while ( jiffies < start_jiffies+1)
+	 *		start = read_current_timer();
+	 * will not do. As we don't really know whether jiffy switch
+	 * happened first or timer_value was read first. And some asynchronous
+	 * event can happen between these two events introducing errors in lpj.
+	 *
+	 * So, we do
+	 * 1. pre_start <- When we are sure that jiffy switch hasn't happened
+	 * 2. check jiffy switch
+	 * 3. start <- timer value before or after jiffy switch
+	 * 4. post_start <- When we are sure that jiffy switch has happened
+	 *
+	 * Note, we don't know anything about order of 2 and 3.
+	 * Now, by looking at post_start and pre_start difference, we can
+	 * check whether any asynchronous event happened or not
+	 */
+
+	for (i = 0; i < MAX_DIRECT_CALIBRATION_RETRIES; i++) {
+		pre_start = 0;
+		read_current_timer(&start);
+		start_jiffies = jiffies;
+		while (jiffies <= (start_jiffies + 1)) {
+			pre_start = start;
+			read_current_timer(&start);
+		}
+		read_current_timer(&post_start);
+
+		pre_end = 0;
+		end = post_start;
+		while (jiffies <=
+		       (start_jiffies + 1 + DELAY_CALIBRATION_TICKS)) {
+			pre_end = end;
+			read_current_timer(&end);
+		}
+		read_current_timer(&post_end);
+
+		tsc_rate_max = (post_end - pre_start) / DELAY_CALIBRATION_TICKS;
+		tsc_rate_min = (pre_end - post_start) / DELAY_CALIBRATION_TICKS;
+
+		/*
+	 	 * If the upper limit and lower limit of the tsc_rate is
+		 * >= 12.5% apart, redo calibration.
+		 */
+		if (pre_start != 0 && pre_end != 0 &&
+		    (tsc_rate_max - tsc_rate_min) < (tsc_rate_max >> 3)) {
+			good_tsc_count++;
+			good_tsc_sum += tsc_rate_max;
+		}
+	}
+
+	if (good_tsc_count)
+		return (good_tsc_sum/good_tsc_count);
+
+	printk(KERN_WARNING "calibrate_delay_direct() failed to get a good "
+	       "estimate for loops_per_jiffy.\nProbably due to long platform interrupts. Consider using \"lpj=\" boot option.\n");
+	return 0;
+}
+#else
+static unsigned long __devinit calibrate_delay_direct(void) {return 0;}
+#endif
+
 /*
  * This is the number of bits of precision for the loops_per_jiffy.  Each
  * bit takes on average 1.5/HZ seconds.  This (like the original) is a little
@@ -35,6 +123,12 @@ void __devinit calibrate_delay(void)
 			"%lu.%02lu BogoMIPS preset\n",
 			loops_per_jiffy/(500000/HZ),
 			(loops_per_jiffy/(5000/HZ)) % 100);
+	} else if ((loops_per_jiffy = calibrate_delay_direct()) != 0) {
+		printk("Calibrating delay using timer specific routine.. ");
+		printk("%lu.%02lu BogoMIPS (lpj=%lu)\n",
+			loops_per_jiffy/(500000/HZ),
+			(loops_per_jiffy/(5000/HZ)) % 100,
+			loops_per_jiffy);
 	} else {
 		loops_per_jiffy = (1<<12);
 
diff --git a/init/do_mounts.c b/init/do_mounts.c
index b7570c074d0..4e11a9aaf14 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -7,6 +7,7 @@
 #include <linux/root_dev.h>
 #include <linux/security.h>
 #include <linux/delay.h>
+#include <linux/mount.h>
 
 #include <linux/nfs_fs.h>
 #include <linux/nfs_fs_sb.h>
@@ -25,8 +26,6 @@ static char __initdata saved_root_name[64];
 /* this is initialized in init/main.c */
 dev_t ROOT_DEV;
 
-EXPORT_SYMBOL(ROOT_DEV);
-
 static int __init load_ramdisk(char *str)
 {
 	rd_doload = simple_strtol(str,NULL,0) & 3;
diff --git a/init/do_mounts.h b/init/do_mounts.h
index de92bee4f35..e0a7ac9649e 100644
--- a/init/do_mounts.h
+++ b/init/do_mounts.h
@@ -9,7 +9,6 @@
 #include <linux/major.h>
 #include <linux/root_dev.h>
 
-dev_t name_to_dev_t(char *name);
 void  change_floppy(char *fmt, ...);
 void  mount_block_root(char *name, int flags);
 void  mount_root(void);
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 07e7d31f2d0..a05cabd0fd1 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -41,7 +41,7 @@ static int __init do_linuxrc(void * shell)
 static void __init handle_initrd(void)
 {
 	int error;
-	int i, pid;
+	int pid;
 
 	real_root_dev = new_encode_dev(ROOT_DEV);
 	create_dev("/dev/root.old", Root_RAM0, NULL);
@@ -58,7 +58,7 @@ static void __init handle_initrd(void)
 
 	pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
 	if (pid > 0) {
-		while (pid != sys_wait4(-1, &i, 0, NULL))
+		while (pid != sys_wait4(-1, NULL, 0, NULL))
 			yield();
 	}
 
@@ -86,7 +86,10 @@ static void __init handle_initrd(void)
 		printk("okay\n");
 	else {
 		int fd = sys_open("/dev/root.old", O_RDWR, 0);
-		printk("failed\n");
+		if (error == -ENOENT)
+			printk("/initrd does not exist. Ignored.\n");
+		else
+			printk("failed\n");
 		printk(KERN_NOTICE "Unmounting old root\n");
 		sys_umount("/old", MNT_DETACH);
 		printk(KERN_NOTICE "Trying to free ramdisk memory ... ");
diff --git a/init/main.c b/init/main.c
index 40bf367ffdf..c9c311cf177 100644
--- a/init/main.c
+++ b/init/main.c
@@ -51,6 +51,7 @@
 #include <asm/io.h>
 #include <asm/bugs.h>
 #include <asm/setup.h>
+#include <asm/sections.h>
 
 /*
  * This is one of the first .c files built. Error out early
@@ -323,8 +324,6 @@ static void __init setup_per_cpu_areas(void)
 {
 	unsigned long size, i;
 	char *ptr;
-	/* Created by linker magic */
-	extern char __per_cpu_start[], __per_cpu_end[];
 
 	/* Copy section for each CPU (we discard the original) */
 	size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
@@ -383,6 +382,13 @@ static void noinline rest_init(void)
 	numa_default_policy();
 	unlock_kernel();
 	preempt_enable_no_resched();
+
+	/*
+	 * The boot idle thread must execute schedule()
+	 * at least one to get things moving:
+	 */
+	schedule();
+
 	cpu_idle();
 } 
 
@@ -490,6 +496,7 @@ asmlinkage void __init start_kernel(void)
 	vfs_caches_init_early();
 	mem_init();
 	kmem_cache_init();
+	setup_per_cpu_pageset();
 	numa_policy_init();
 	if (late_time_init)
 		late_time_init();