diff options
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 18987c7f6ad..08562f41976 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -100,6 +100,13 @@ struct pid *cad_pid; EXPORT_SYMBOL(cad_pid); /* + * If set, this is used for preparing the system to power off. + */ + +void (*pm_power_off_prepare)(void); +EXPORT_SYMBOL(pm_power_off_prepare); + +/* * Notifier list for kernel code which wants to be called * at shutdown. This is used to stop any idling DMA operations * and the like. @@ -867,6 +874,8 @@ EXPORT_SYMBOL_GPL(kernel_halt); void kernel_power_off(void) { kernel_shutdown_prepare(SYSTEM_POWER_OFF); + if (pm_power_off_prepare) + pm_power_off_prepare(); printk(KERN_EMERG "Power down.\n"); machine_power_off(); } @@ -1027,7 +1036,7 @@ asmlinkage long sys_setregid(gid_t rgid, gid_t egid) return -EPERM; } if (new_egid != old_egid) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } if (rgid != (gid_t) -1 || @@ -1057,13 +1066,13 @@ asmlinkage long sys_setgid(gid_t gid) if (capable(CAP_SETGID)) { if (old_egid != gid) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } current->gid = current->egid = current->sgid = current->fsgid = gid; } else if ((gid == current->gid) || (gid == current->sgid)) { if (old_egid != gid) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } current->egid = current->fsgid = gid; @@ -1094,7 +1103,7 @@ static int set_user(uid_t new_ruid, int dumpclear) switch_uid(new_user); if (dumpclear) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } current->uid = new_ruid; @@ -1150,7 +1159,7 @@ asmlinkage long sys_setreuid(uid_t ruid, uid_t euid) return -EAGAIN; if (new_euid != old_euid) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } current->fsuid = current->euid = new_euid; @@ -1200,7 +1209,7 @@ asmlinkage long sys_setuid(uid_t uid) return -EPERM; if (old_euid != uid) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } current->fsuid = current->euid = uid; @@ -1245,7 +1254,7 @@ asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid) } if (euid != (uid_t) -1) { if (euid != current->euid) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } current->euid = euid; @@ -1295,7 +1304,7 @@ asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid) } if (egid != (gid_t) -1) { if (egid != current->egid) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } current->egid = egid; @@ -1341,7 +1350,7 @@ asmlinkage long sys_setfsuid(uid_t uid) uid == current->suid || uid == current->fsuid || capable(CAP_SETUID)) { if (uid != old_fsuid) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } current->fsuid = uid; @@ -1370,7 +1379,7 @@ asmlinkage long sys_setfsgid(gid_t gid) gid == current->sgid || gid == current->fsgid || capable(CAP_SETGID)) { if (gid != old_fsgid) { - current->mm->dumpable = suid_dumpable; + set_dumpable(current->mm, suid_dumpable); smp_wmb(); } current->fsgid = gid; @@ -2167,14 +2176,14 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3, error = put_user(current->pdeath_signal, (int __user *)arg2); break; case PR_GET_DUMPABLE: - error = current->mm->dumpable; + error = get_dumpable(current->mm); break; case PR_SET_DUMPABLE: if (arg2 < 0 || arg2 > 1) { error = -EINVAL; break; } - current->mm->dumpable = arg2; + set_dumpable(current->mm, arg2); break; case PR_SET_UNALIGN: |