tunnels: fix netns vs proto registration ordering

[safe/jmp/linux-2.6] / kernel / kexec.c

diff --git a/kernel/kexec.c b/kernel/kexec.c
index aef2653..a9a93d9 100644 (file)
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -21,7 +21,7 @@
 #include <linux/hardirq.h>
 #include <linux/elf.h>
 #include <linux/elfcore.h>
-#include <linux/utsrelease.h>
+#include <generated/utsrelease.h>
 #include <linux/utsname.h>
 #include <linux/numa.h>
 #include <linux/suspend.h>
@@ -30,6 +30,8 @@
 #include <linux/pm.h>
 #include <linux/cpu.h>
 #include <linux/console.h>
+#include <linux/vmalloc.h>
+#include <linux/swap.h>
 
 #include <asm/page.h>
 #include <asm/uaccess.h>
@@ -41,7 +43,7 @@
 note_buf_t* crash_notes;
 
 /* vmcoreinfo stuff */
-unsigned char vmcoreinfo_data[VMCOREINFO_BYTES];
+static unsigned char vmcoreinfo_data[VMCOREINFO_BYTES];
 u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
 size_t vmcoreinfo_size;
 size_t vmcoreinfo_max_size = sizeof(vmcoreinfo_data);
@@ -933,9 +935,8 @@ struct kimage *kexec_crash_image;
 
 static DEFINE_MUTEX(kexec_mutex);
 
-asmlinkage long sys_kexec_load(unsigned long entry, unsigned long nr_segments,
-                               struct kexec_segment __user *segments,
-                               unsigned long flags)
+SYSCALL_DEFINE4(kexec_load, unsigned long, entry, unsigned long, nr_segments,
+               struct kexec_segment __user *, segments, unsigned long, flags)
 {
        struct kimage **dest_image, *image;
        int result;
@@ -1082,6 +1083,64 @@ void crash_kexec(struct pt_regs *regs)
        }
 }
 
+size_t crash_get_memory_size(void)
+{
+       size_t size;
+       mutex_lock(&kexec_mutex);
+       size = crashk_res.end - crashk_res.start + 1;
+       mutex_unlock(&kexec_mutex);
+       return size;
+}
+
+static void free_reserved_phys_range(unsigned long begin, unsigned long end)
+{
+       unsigned long addr;
+
+       for (addr = begin; addr < end; addr += PAGE_SIZE) {
+               ClearPageReserved(pfn_to_page(addr >> PAGE_SHIFT));
+               init_page_count(pfn_to_page(addr >> PAGE_SHIFT));
+               free_page((unsigned long)__va(addr));
+               totalram_pages++;
+       }
+}
+
+int crash_shrink_memory(unsigned long new_size)
+{
+       int ret = 0;
+       unsigned long start, end;
+
+       mutex_lock(&kexec_mutex);
+
+       if (kexec_crash_image) {
+               ret = -ENOENT;
+               goto unlock;
+       }
+       start = crashk_res.start;
+       end = crashk_res.end;
+
+       if (new_size >= end - start + 1) {
+               ret = -EINVAL;
+               if (new_size == end - start + 1)
+                       ret = 0;
+               goto unlock;
+       }
+
+       start = roundup(start, PAGE_SIZE);
+       end = roundup(start + new_size, PAGE_SIZE);
+
+       free_reserved_phys_range(end, crashk_res.end);
+
+       if (start == end) {
+               crashk_res.end = end;
+               release_resource(&crashk_res);
+       } else
+               crashk_res.end = end - 1;
+
+unlock:
+       mutex_unlock(&kexec_mutex);
+       return ret;
+}
+
 static u32 *append_elf_note(u32 *buf, char *name, unsigned type, void *data,
                            size_t data_len)
 {
@@ -1115,7 +1174,7 @@ void crash_save_cpu(struct pt_regs *regs, int cpu)
        struct elf_prstatus prstatus;
        u32 *buf;
 
-       if ((cpu < 0) || (cpu >= NR_CPUS))
+       if ((cpu < 0) || (cpu >= nr_cpu_ids))
                return;
 
        /* Using ELF notes here is opportunistic.
@@ -1130,7 +1189,7 @@ void crash_save_cpu(struct pt_regs *regs, int cpu)
                return;
        memset(&prstatus, 0, sizeof(prstatus));
        prstatus.pr_pid = current->pid;
-       elf_core_copy_regs(&prstatus.pr_reg, regs);
+       elf_core_copy_kernel_regs(&prstatus.pr_reg, regs);
        buf = append_elf_note(buf, KEXEC_CORE_NOTE_NAME, NT_PRSTATUS,
                              &prstatus, sizeof(prstatus));
        final_note(buf);
@@ -1228,7 +1287,7 @@ static int __init parse_crashkernel_mem(char                      *cmdline,
        } while (*cur++ == ',');
 
        if (*crash_size > 0) {
-               while (*cur != ' ' && *cur != '@')
+               while (*cur && *cur != ' ' && *cur != '@')
                        cur++;
                if (*cur == '@') {
                        cur++;
@@ -1371,6 +1430,7 @@ static int __init crash_save_vmcoreinfo_init(void)
        VMCOREINFO_SYMBOL(node_online_map);
        VMCOREINFO_SYMBOL(swapper_pg_dir);
        VMCOREINFO_SYMBOL(_stext);
+       VMCOREINFO_SYMBOL(vmlist);
 
 #ifndef CONFIG_NEED_MULTIPLE_NODES
        VMCOREINFO_SYMBOL(mem_map);
@@ -1406,7 +1466,9 @@ static int __init crash_save_vmcoreinfo_init(void)
        VMCOREINFO_OFFSET(free_area, free_list);
        VMCOREINFO_OFFSET(list_head, next);
        VMCOREINFO_OFFSET(list_head, prev);
+       VMCOREINFO_OFFSET(vm_struct, addr);
        VMCOREINFO_LENGTH(zone.free_area, MAX_ORDER);
+       log_buf_kexec_setup();
        VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
        VMCOREINFO_NUMBER(NR_FREE_PAGES);
        VMCOREINFO_NUMBER(PG_lru);
@@ -1445,22 +1507,25 @@ int kernel_kexec(void)
                        goto Restore_console;
                }
                suspend_console();
-               error = device_suspend(PMSG_FREEZE);
+               error = dpm_suspend_start(PMSG_FREEZE);
                if (error)
                        goto Resume_console;
-               error = disable_nonboot_cpus();
-               if (error)
-                       goto Resume_devices;
-               device_pm_lock();
-               local_irq_disable();
-               /* At this point, device_suspend() has been called,
-                * but *not* device_power_down(). We *must*
-                * device_power_down() now.  Otherwise, drivers for
+               /* At this point, dpm_suspend_start() has been called,
+                * but *not* dpm_suspend_noirq(). We *must* call
+                * dpm_suspend_noirq() now.  Otherwise, drivers for
                 * some devices (e.g. interrupt controllers) become
                 * desynchronized with the actual state of the
                 * hardware at resume time, and evil weirdness ensues.
                 */
-               error = device_power_down(PMSG_FREEZE);
+               error = dpm_suspend_noirq(PMSG_FREEZE);
+               if (error)
+                       goto Resume_devices;
+               error = disable_nonboot_cpus();
+               if (error)
+                       goto Enable_cpus;
+               local_irq_disable();
+               /* Suspend system devices */
+               error = sysdev_suspend(PMSG_FREEZE);
                if (error)
                        goto Enable_irqs;
        } else
@@ -1475,13 +1540,14 @@ int kernel_kexec(void)
 
 #ifdef CONFIG_KEXEC_JUMP
        if (kexec_image->preserve_context) {
-               device_power_up(PMSG_RESTORE);
+               sysdev_resume();
  Enable_irqs:
                local_irq_enable();
-               device_pm_unlock();
+ Enable_cpus:
                enable_nonboot_cpus();
+               dpm_resume_noirq(PMSG_RESTORE);
  Resume_devices:
-               device_resume(PMSG_RESTORE);
+               dpm_resume_end(PMSG_RESTORE);
  Resume_console:
                resume_console();
                thaw_processes();