11 files changed, 102 insertions, 57 deletions

diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index b1b2b30b1b8e..c7c9c2a15fab 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -1212,21 +1212,26 @@ source "drivers/Kconfig"
 
 source "fs/Kconfig"
 
-menu "Instrumentation Support"
+menuconfig INSTRUMENTATION
+        bool "Instrumentation Support"
         depends on EXPERIMENTAL
+        default y
+
+if INSTRUMENTATION
 
 source "arch/i386/oprofile/Kconfig"
 
 config KPROBES
-        bool "Kprobes (EXPERIMENTAL)"
-        depends on KALLSYMS && EXPERIMENTAL && MODULES
+        bool "Kprobes"
+        depends on KALLSYMS && MODULES
         help
           Kprobes allows you to trap at almost any kernel address and
           execute a callback function.  register_kprobe() establishes
           a probepoint and specifies the callback.  Kprobes is useful
           for kernel debugging, non-intrusive instrumentation and testing.
           If in doubt, say "N".
-endmenu
+
+endif # INSTRUMENTATION
 
 source "arch/i386/Kconfig.debug"
 
diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index bd28f9f9b4b7..181cc29a7c4f 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -108,6 +108,7 @@ drivers-$(CONFIG_PCI)			+= arch/i386/pci/
 # must be linked after kernel/
 drivers-$(CONFIG_OPROFILE)              += arch/i386/oprofile/
 drivers-$(CONFIG_PM)                    += arch/i386/power/
+drivers-$(CONFIG_FB)                    += arch/i386/video/
 
 CFLAGS += $(mflags-y)
 AFLAGS += $(mflags-y)
diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index 4112afe712b9..47001d50a083 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -222,6 +222,7 @@
 #include <linux/capability.h>
 #include <linux/device.h>
 #include <linux/kernel.h>
+#include <linux/freezer.h>
 #include <linux/smp.h>
 #include <linux/dmi.h>
 #include <linux/suspend.h>
@@ -2311,7 +2312,6 @@ static int __init apm_init(void)
                 remove_proc_entry("apm", NULL);
                 return err;
         }
-        kapmd_task->flags |= PF_NOFREEZE;
         wake_up_process(kapmd_task);
 
         if (num_online_cpus() > 1 && !smp ) {
diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S
index f74dfc419b56..82714668d43b 100644
--- a/arch/i386/kernel/head.S
+++ b/arch/i386/kernel/head.S
@@ -168,6 +168,12 @@ page_pde_offset = (__PAGE_OFFSET >> 20);
 .section .init.text,"ax",@progbits
 #endif
 
+        /* Do an early initialization of the fixmap area */
+        movl $(swapper_pg_dir - __PAGE_OFFSET), %edx
+        movl $(swapper_pg_pmd - __PAGE_OFFSET), %eax
+        addl $0x007, %eax                       /* 0x007 = PRESENT+RW+USER */
+        movl %eax, 4092(%edx)
+
 #ifdef CONFIG_SMP
 ENTRY(startup_32_smp)
         cld
@@ -507,6 +513,8 @@ ENTRY(_stext)
 .section ".bss.page_aligned","w"
 ENTRY(swapper_pg_dir)
         .fill 1024,4,0
+ENTRY(swapper_pg_pmd)
+        .fill 1024,4,0
 ENTRY(empty_zero_page)
         .fill 4096,1,0
 
diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c
index 7f8b7af2b95f..21db8f56c9a1 100644
--- a/arch/i386/kernel/io_apic.c
+++ b/arch/i386/kernel/io_apic.c
@@ -667,6 +667,7 @@ static int balanced_irq(void *unused)
                 set_pending_irq(i, cpumask_of_cpu(0));
         }
 
+        set_freezable();
         for ( ; ; ) {
                 time_remaining = schedule_timeout_interruptible(time_remaining);
                 try_to_freeze();
diff --git a/arch/i386/kernel/nmi.c b/arch/i386/kernel/nmi.c
index fba121f7973f..03b7f5584d71 100644
--- a/arch/i386/kernel/nmi.c
+++ b/arch/i386/kernel/nmi.c
@@ -295,7 +295,7 @@ static unsigned int
         last_irq_sums [NR_CPUS],
         alert_counter [NR_CPUS];
 
-void touch_nmi_watchdog (void)
+void touch_nmi_watchdog(void)
 {
         if (nmi_watchdog > 0) {
                 unsigned cpu;
@@ -304,8 +304,10 @@ void touch_nmi_watchdog (void)
                  * Just reset the alert counters, (other CPUs might be
                  * spinning on locks we hold):
                  */
-                for_each_present_cpu (cpu)
-                        alert_counter[cpu] = 0;
+                for_each_present_cpu(cpu) {
+                        if (alert_counter[cpu])
+                                alert_counter[cpu] = 0;
+                }
         }
 
         /*
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c
index 06dfa65ad180..6c49acb96982 100644
--- a/arch/i386/kernel/process.c
+++ b/arch/i386/kernel/process.c
@@ -538,8 +538,31 @@ int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
         return 1;
 }
 
-static noinline void __switch_to_xtra(struct task_struct *next_p,
-                                    struct tss_struct *tss)
+#ifdef CONFIG_SECCOMP
+void hard_disable_TSC(void)
+{
+        write_cr4(read_cr4() | X86_CR4_TSD);
+}
+void disable_TSC(void)
+{
+        preempt_disable();
+        if (!test_and_set_thread_flag(TIF_NOTSC))
+                /*
+                 * Must flip the CPU state synchronously with
+                 * TIF_NOTSC in the current running context.
+                 */
+                hard_disable_TSC();
+        preempt_enable();
+}
+void hard_enable_TSC(void)
+{
+        write_cr4(read_cr4() & ~X86_CR4_TSD);
+}
+#endif /* CONFIG_SECCOMP */
+
+static noinline void
+__switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
+                 struct tss_struct *tss)
 {
         struct thread_struct *next;
 
@@ -555,6 +578,17 @@ static noinline void __switch_to_xtra(struct task_struct *next_p,
                 set_debugreg(next->debugreg[7], 7);
         }
 
+#ifdef CONFIG_SECCOMP
+        if (test_tsk_thread_flag(prev_p, TIF_NOTSC) ^
+            test_tsk_thread_flag(next_p, TIF_NOTSC)) {
+                /* prev and next are different */
+                if (test_tsk_thread_flag(next_p, TIF_NOTSC))
+                        hard_disable_TSC();
+                else
+                        hard_enable_TSC();
+        }
+#endif
+
         if (!test_tsk_thread_flag(next_p, TIF_IO_BITMAP)) {
                 /*
                  * Disable the bitmap via an invalid offset. We still cache
@@ -586,33 +620,6 @@ static noinline void __switch_to_xtra(struct task_struct *next_p,
 }
 
 /*
- * This function selects if the context switch from prev to next
- * has to tweak the TSC disable bit in the cr4.
- */
-static inline void disable_tsc(struct task_struct *prev_p,
-                               struct task_struct *next_p)
-{
-        struct thread_info *prev, *next;
-
-        /*
-         * gcc should eliminate the ->thread_info dereference if
-         * has_secure_computing returns 0 at compile time (SECCOMP=n).
-         */
-        prev = task_thread_info(prev_p);
-        next = task_thread_info(next_p);
-
-        if (has_secure_computing(prev) || has_secure_computing(next)) {
-                /* slow path here */
-                if (has_secure_computing(prev) &&
-                    !has_secure_computing(next)) {
-                        write_cr4(read_cr4() & ~X86_CR4_TSD);
-                } else if (!has_secure_computing(prev) &&
-                           has_secure_computing(next))
-                        write_cr4(read_cr4() | X86_CR4_TSD);
-        }
-}
-
-/*
  *      switch_to(x,yn) should switch tasks from x to y.
  *
  * We fsave/fwait so that an exception goes off at the right time
@@ -689,11 +696,9 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas
         /*
          * Now maybe handle debug registers and/or IO bitmaps
          */
-        if (unlikely((task_thread_info(next_p)->flags & _TIF_WORK_CTXSW)
-            || test_tsk_thread_flag(prev_p, TIF_IO_BITMAP)))
-                __switch_to_xtra(next_p, tss);
-
-        disable_tsc(prev_p, next_p);
+        if (unlikely(task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW_PREV ||
+                     task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT))
+                __switch_to_xtra(prev_p, next_p, tss);
 
         /*
          * Leave lazy mode, flushing any hypercalls made here.
diff --git a/arch/i386/kernel/ptrace.c b/arch/i386/kernel/ptrace.c
index 0c0ceec5de00..1c075f58d1f9 100644
--- a/arch/i386/kernel/ptrace.c
+++ b/arch/i386/kernel/ptrace.c
@@ -358,17 +358,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
         switch (request) {
         /* when I and D space are separate, these will need to be fixed. */
         case PTRACE_PEEKTEXT: /* read word at location addr. */ 
-        case PTRACE_PEEKDATA: {
-                unsigned long tmp;
-                int copied;
-
-                copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
-                ret = -EIO;
-                if (copied != sizeof(tmp))
-                        break;
-                ret = put_user(tmp, datap);
+        case PTRACE_PEEKDATA:
+                ret = generic_ptrace_peekdata(child, addr, data);
                 break;
-        }
 
         /* read the word at location addr in the USER area. */
         case PTRACE_PEEKUSR: {
@@ -395,10 +387,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
         /* when I and D space are separate, this will have to be fixed. */
         case PTRACE_POKETEXT: /* write the word at location addr. */
         case PTRACE_POKEDATA:
-                ret = 0;
-                if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-                        break;
-                ret = -EIO;
+                ret = generic_ptrace_pokedata(child, addr, data);
                 break;
 
         case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index 90da0575fcff..18c1c285836d 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -390,7 +390,7 @@ void die(const char * str, struct pt_regs * regs, long err)
                 unsigned long esp;
                 unsigned short ss;
 
-                report_bug(regs->eip);
+                report_bug(regs->eip, regs);
 
                 printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
 #ifdef CONFIG_PREEMPT
@@ -433,6 +433,7 @@ void die(const char * str, struct pt_regs * regs, long err)
 
         bust_spinlocks(0);
         die.lock_owner = -1;
+        add_taint(TAINT_DIE);
         spin_unlock_irqrestore(&die.lock, flags);
 
         if (!regs)
diff --git a/arch/i386/video/Makefile b/arch/i386/video/Makefile
new file mode 100644
index 000000000000..2c447c94adcc
--- /dev/null
+++ b/arch/i386/video/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_FB)               += fbdev.o
diff --git a/arch/i386/video/fbdev.c b/arch/i386/video/fbdev.c
new file mode 100644
index 000000000000..48fb38d7d2c0
--- /dev/null
+++ b/arch/i386/video/fbdev.c
@@ -0,0 +1,32 @@
+/*
+ * arch/i386/video/fbdev.c - i386 Framebuffer
+ *
+ * Copyright (C) 2007 Antonino Daplas <adaplas@gmail.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ *
+ */
+#include <linux/fb.h>
+#include <linux/pci.h>
+
+int fb_is_primary_device(struct fb_info *info)
+{
+        struct device *device = info->device;
+        struct pci_dev *pci_dev = NULL;
+        struct resource *res = NULL;
+        int retval = 0;
+
+        if (device)
+                pci_dev = to_pci_dev(device);
+
+        if (pci_dev)
+                res = &pci_dev->resource[PCI_ROM_RESOURCE];
+
+        if (res && res->flags & IORESOURCE_ROM_SHADOW)
+                retval = 1;
+
+        return retval;
+}
+EXPORT_SYMBOL(fb_is_primary_device);