diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-12-14 09:16:49 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-14 09:16:49 +0100 |
| commit | cc0104e877fff32865a67b256d3a9ce52ff15790 (patch) | |
| tree | 18779442274e81607822ecb0905c55ac4ce6a163 /kernel/sys.c | |
| parent | 16620e0f1990fa6d896a639449c4b3d678458464 (diff) | |
| parent | f40542532e96dda5506eb76badea322f2ae4731c (diff) | |
Merge branch 'linus' into tracing/urgent
Conflicts:
kernel/trace/trace_kprobe.c
Merge reason: resolve the conflict.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 9968c5fb55b..585d6cd1004 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -8,7 +8,6 @@ #include <linux/mm.h> #include <linux/utsname.h> #include <linux/mman.h> -#include <linux/smp_lock.h> #include <linux/notifier.h> #include <linux/reboot.h> #include <linux/prctl.h> @@ -349,6 +348,9 @@ void kernel_power_off(void) machine_power_off(); } EXPORT_SYMBOL_GPL(kernel_power_off); + +static DEFINE_MUTEX(reboot_mutex); + /* * Reboot system call: for obvious reasons only root may call it, * and even root needs to set up some magic numbers in the registers @@ -381,7 +383,7 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd, if ((cmd == LINUX_REBOOT_CMD_POWER_OFF) && !pm_power_off) cmd = LINUX_REBOOT_CMD_HALT; - lock_kernel(); + mutex_lock(&reboot_mutex); switch (cmd) { case LINUX_REBOOT_CMD_RESTART: kernel_restart(NULL); @@ -397,20 +399,18 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd, case LINUX_REBOOT_CMD_HALT: kernel_halt(); - unlock_kernel(); do_exit(0); panic("cannot halt"); case LINUX_REBOOT_CMD_POWER_OFF: kernel_power_off(); - unlock_kernel(); do_exit(0); break; case LINUX_REBOOT_CMD_RESTART2: if (strncpy_from_user(&buffer[0], arg, sizeof(buffer) - 1) < 0) { - unlock_kernel(); - return -EFAULT; + ret = -EFAULT; + break; } buffer[sizeof(buffer) - 1] = '\0'; @@ -433,7 +433,7 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd, ret = -EINVAL; break; } - unlock_kernel(); + mutex_unlock(&reboot_mutex); return ret; } |