Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (225 commits)
  [PATCH] Don't set calgary iommu as default y
  [PATCH] i386/x86-64: New Intel feature flags
  [PATCH] x86: Add a cumulative thermal throttle event counter.
  [PATCH] i386: Make the jiffies compares use the 64bit safe macros.
  [PATCH] x86: Refactor thermal throttle processing
  [PATCH] Add 64bit jiffies compares (for use with get_jiffies_64)
  [PATCH] Fix unwinder warning in traps.c
  [PATCH] x86: Allow disabling early pci scans with pci=noearly or disallowing conf1
  [PATCH] x86: Move direct PCI scanning functions out of line
  [PATCH] i386/x86-64: Make all early PCI scans dependent on CONFIG_PCI
  [PATCH] Don't leak NT bit into next task
  [PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder
  [PATCH] Fix some broken white space in ia32_signal.c
  [PATCH] Initialize argument registers for 32bit signal handlers.
  [PATCH] Remove all traces of signal number conversion
  [PATCH] Don't synchronize time reading on single core AMD systems
  [PATCH] Remove outdated comment in x86-64 mmconfig code
  [PATCH] Use string instructions for Core2 copy/clear
  [PATCH] x86: - restore i8259A eoi status on resume
  [PATCH] i386: Split multi-line printk in oops output.
  ...

5 files changed, 27 insertions, 45 deletions

diff --git a/arch/i386/mm/discontig.c b/arch/i386/mm/discontig.c
index fb5d8b747de..941d1a5ebab 100644
--- a/arch/i386/mm/discontig.c
+++ b/arch/i386/mm/discontig.c
@@ -322,6 +322,11 @@ unsigned long __init setup_memory(void)
 		highstart_pfn = system_max_low_pfn;
 	printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
 	       pages_to_mb(highend_pfn - highstart_pfn));
+	num_physpages = highend_pfn;
+	high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
+#else
+	num_physpages = system_max_low_pfn;
+	high_memory = (void *) __va(system_max_low_pfn * PAGE_SIZE - 1) + 1;
 #endif
 	printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
 			pages_to_mb(system_max_low_pfn));
diff --git a/arch/i386/mm/extable.c b/arch/i386/mm/extable.c
index de03c5430ab..0ce4f22a263 100644
--- a/arch/i386/mm/extable.c
+++ b/arch/i386/mm/extable.c
@@ -11,7 +11,7 @@ int fixup_exception(struct pt_regs *regs)
 	const struct exception_table_entry *fixup;
 
 #ifdef CONFIG_PNPBIOS
-	if (unlikely((regs->xcs & ~15) == (GDT_ENTRY_PNPBIOS_BASE << 3)))
+	if (unlikely(SEGMENT_IS_PNP_CODE(regs->xcs)))
 	{
 		extern u32 pnp_bios_fault_eip, pnp_bios_fault_esp;
 		extern u32 pnp_bios_is_utter_crap;
diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c
index f7279468323..5e17a3f43b4 100644
--- a/arch/i386/mm/fault.c
+++ b/arch/i386/mm/fault.c
@@ -27,21 +27,24 @@
 #include <asm/uaccess.h>
 #include <asm/desc.h>
 #include <asm/kdebug.h>
+#include <asm/segment.h>
 
 extern void die(const char *,struct pt_regs *,long);
 
-#ifdef CONFIG_KPROBES
-ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
+static ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
+
 int register_page_fault_notifier(struct notifier_block *nb)
 {
 	vmalloc_sync_all();
 	return atomic_notifier_chain_register(&notify_page_fault_chain, nb);
 }
+EXPORT_SYMBOL_GPL(register_page_fault_notifier);
 
 int unregister_page_fault_notifier(struct notifier_block *nb)
 {
 	return atomic_notifier_chain_unregister(&notify_page_fault_chain, nb);
 }
+EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
 
 static inline int notify_page_fault(enum die_val val, const char *str,
 			struct pt_regs *regs, long err, int trap, int sig)
@@ -55,14 +58,6 @@ static inline int notify_page_fault(enum die_val val, const char *str,
 	};
 	return atomic_notifier_call_chain(&notify_page_fault_chain, val, &args);
 }
-#else
-static inline int notify_page_fault(enum die_val val, const char *str,
-			struct pt_regs *regs, long err, int trap, int sig)
-{
-	return NOTIFY_DONE;
-}
-#endif
-
 
 /*
  * Unlock any spinlocks which will prevent us from getting the
@@ -119,10 +114,10 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
 	}
 
 	/* The standard kernel/user address space limit. */
-	*eip_limit = (seg & 3) ? USER_DS.seg : KERNEL_DS.seg;
+	*eip_limit = user_mode(regs) ? USER_DS.seg : KERNEL_DS.seg;
 	
 	/* By far the most common cases. */
-	if (likely(seg == __USER_CS || seg == __KERNEL_CS))
+	if (likely(SEGMENT_IS_FLAT_CODE(seg)))
 		return eip;
 
 	/* Check the segment exists, is within the current LDT/GDT size,
@@ -436,11 +431,7 @@ good_area:
 	write = 0;
 	switch (error_code & 3) {
 		default:	/* 3: write, present */
-#ifdef TEST_VERIFY_AREA
-			if (regs->cs == KERNEL_CS)
-				printk("WP fault at %08lx\n", regs->eip);
-#endif
-			/* fall through */
+				/* fall through */
 		case 2:		/* write, not present */
 			if (!(vma->vm_flags & VM_WRITE))
 				goto bad_area;
diff --git a/arch/i386/mm/highmem.c b/arch/i386/mm/highmem.c
index b6eb4dcb877..ba44000b906 100644
--- a/arch/i386/mm/highmem.c
+++ b/arch/i386/mm/highmem.c
@@ -54,7 +54,7 @@ void kunmap_atomic(void *kvaddr, enum km_type type)
 	unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
 	enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
 
-	if (vaddr < FIXADDR_START) { // FIXME
+	if (vaddr >= PAGE_OFFSET && vaddr < (unsigned long)high_memory) {
 		dec_preempt_count();
 		preempt_check_resched();
 		return;
diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c
index efd0bcdac65..4a5a914b343 100644
--- a/arch/i386/mm/init.c
+++ b/arch/i386/mm/init.c
@@ -435,16 +435,22 @@ u64 __supported_pte_mask __read_mostly = ~_PAGE_NX;
  * on      Enable
  * off     Disable
  */
-void __init noexec_setup(const char *str)
+static int __init noexec_setup(char *str)
 {
-	if (!strncmp(str, "on",2) && cpu_has_nx) {
-		__supported_pte_mask |= _PAGE_NX;
-		disable_nx = 0;
-	} else if (!strncmp(str,"off",3)) {
+	if (!str || !strcmp(str, "on")) {
+		if (cpu_has_nx) {
+			__supported_pte_mask |= _PAGE_NX;
+			disable_nx = 0;
+		}
+	} else if (!strcmp(str,"off")) {
 		disable_nx = 1;
 		__supported_pte_mask &= ~_PAGE_NX;
-	}
+	} else
+		return -EINVAL;
+
+	return 0;
 }
+early_param("noexec", noexec_setup);
 
 int nx_enabled = 0;
 #ifdef CONFIG_X86_PAE
@@ -552,18 +558,6 @@ static void __init test_wp_bit(void)
 	}
 }
 
-static void __init set_max_mapnr_init(void)
-{
-#ifdef CONFIG_HIGHMEM
-	num_physpages = highend_pfn;
-#else
-	num_physpages = max_low_pfn;
-#endif
-#ifdef CONFIG_FLATMEM
-	max_mapnr = num_physpages;
-#endif
-}
-
 static struct kcore_list kcore_mem, kcore_vmalloc; 
 
 void __init mem_init(void)
@@ -590,14 +584,6 @@ void __init mem_init(void)
 	}
 #endif
  
-	set_max_mapnr_init();
-
-#ifdef CONFIG_HIGHMEM
-	high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
-#else
-	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
-#endif
-
 	/* this will put all low memory onto the freelists */
 	totalram_pages += free_all_bootmem();