diff options
Diffstat (limited to 'kernel/kexec.c')
| -rw-r--r-- | kernel/kexec.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c index 60bafbed06ab..28c57069ef68 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -32,6 +32,7 @@ #include <linux/vmalloc.h> #include <linux/swap.h> #include <linux/syscore_ops.h> +#include <linux/compiler.h> #include <asm/page.h> #include <asm/uaccess.h> @@ -1039,10 +1040,10 @@ void __weak crash_unmap_reserved_pages(void) {} #ifdef CONFIG_COMPAT -asmlinkage long compat_sys_kexec_load(unsigned long entry, - unsigned long nr_segments, - struct compat_kexec_segment __user *segments, - unsigned long flags) +COMPAT_SYSCALL_DEFINE4(kexec_load, compat_ulong_t, entry, + compat_ulong_t, nr_segments, + struct compat_kexec_segment __user *, segments, + compat_ulong_t, flags) { struct compat_kexec_segment in; struct kexec_segment out, __user *ksegments; @@ -1235,7 +1236,7 @@ static int __init crash_notes_memory_init(void) } return 0; } -module_init(crash_notes_memory_init) +subsys_initcall(crash_notes_memory_init); /* @@ -1551,10 +1552,10 @@ void vmcoreinfo_append_str(const char *fmt, ...) * provide an empty default implementation here -- architecture * code may override this */ -void __attribute__ ((weak)) arch_crash_save_vmcoreinfo(void) +void __weak arch_crash_save_vmcoreinfo(void) {} -unsigned long __attribute__ ((weak)) paddr_vmcoreinfo_note(void) +unsigned long __weak paddr_vmcoreinfo_note(void) { return __pa((unsigned long)(char *)&vmcoreinfo_note); } @@ -1629,7 +1630,7 @@ static int __init crash_save_vmcoreinfo_init(void) return 0; } -module_init(crash_save_vmcoreinfo_init) +subsys_initcall(crash_save_vmcoreinfo_init); /* * Move into place and start executing a preloaded standalone @@ -1682,6 +1683,14 @@ int kernel_kexec(void) kexec_in_progress = true; kernel_restart_prepare(NULL); migrate_to_reboot_cpu(); + + /* + * migrate_to_reboot_cpu() disables CPU hotplug assuming that + * no further code needs to use CPU hotplug (which is true in + * the reboot case). However, the kexec path depends on using + * CPU hotplug again; so re-enable it here. + */ + cpu_hotplug_enable(); printk(KERN_EMERG "Starting new kernel\n"); machine_shutdown(); } |