staging: csr: sme_blocking.c: remove braces around single statement blocks

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / kernel / sys.c

diff --git a/kernel/sys.c b/kernel/sys.c
index 241507f23eca097871bec58f5976476f352f3d75..e6e0ece5f6a04401506d62fb602d7034d4273fe1 100644 (file)
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -368,6 +368,7 @@ EXPORT_SYMBOL(unregister_reboot_notifier);
 void kernel_restart(char *cmd)
 {
        kernel_restart_prepare(cmd);
+       disable_nonboot_cpus();
        if (!cmd)
                printk(KERN_EMERG "Restarting system.\n");
        else
@@ -1264,15 +1265,16 @@ DECLARE_RWSEM(uts_sem);
  * Work around broken programs that cannot handle "Linux 3.0".
  * Instead we map 3.x to 2.6.40+x, so e.g. 3.0 would be 2.6.40
  */
-static int override_release(char __user *release, int len)
+static int override_release(char __user *release, size_t len)
 {
        int ret = 0;
-       char buf[65];
 
        if (current->personality & UNAME26) {
-               char *rest = UTS_RELEASE;
+               const char *rest = UTS_RELEASE;
+               char buf[65] = { 0 };
                int ndots = 0;
                unsigned v;
+               size_t copy;
 
                while (*rest) {
                        if (*rest == '.' && ++ndots >= 3)
@@ -1282,8 +1284,9 @@ static int override_release(char __user *release, int len)
                        rest++;
                }
                v = ((LINUX_VERSION_CODE >> 8) & 0xff) + 40;
-               snprintf(buf, len, "2.6.%u%s", v, rest);
-               ret = copy_to_user(release, buf, len);
+               copy = clamp_t(size_t, len, 1, sizeof(buf));
+               copy = scnprintf(buf, copy, "2.6.%u%s", v, rest);
+               ret = copy_to_user(release, buf, copy + 1);
        }
        return ret;
 }
@@ -1788,15 +1791,15 @@ SYSCALL_DEFINE1(umask, int, mask)
 #ifdef CONFIG_CHECKPOINT_RESTORE
 static int prctl_set_mm_exe_file(struct mm_struct *mm, unsigned int fd)
 {
-       struct file *exe_file;
+       struct fd exe;
        struct dentry *dentry;
        int err;
 
-       exe_file = fget(fd);
-       if (!exe_file)
+       exe = fdget(fd);
+       if (!exe.file)
                return -EBADF;
 
-       dentry = exe_file->f_path.dentry;
+       dentry = exe.file->f_path.dentry;
 
        /*
         * Because the original mm->exe_file points to executable file, make
@@ -1805,7 +1808,7 @@ static int prctl_set_mm_exe_file(struct mm_struct *mm, unsigned int fd)
         */
        err = -EACCES;
        if (!S_ISREG(dentry->d_inode->i_mode)   ||
-           exe_file->f_path.mnt->mnt_flags & MNT_NOEXEC)
+           exe.file->f_path.mnt->mnt_flags & MNT_NOEXEC)
                goto exit;
 
        err = inode_permission(dentry->d_inode, MAY_EXEC);
@@ -1839,12 +1842,12 @@ static int prctl_set_mm_exe_file(struct mm_struct *mm, unsigned int fd)
                goto exit_unlock;
 
        err = 0;
-       set_mm_exe_file(mm, exe_file);
+       set_mm_exe_file(mm, exe.file);  /* this grabs a reference to exe.file */
 exit_unlock:
        up_write(&mm->mmap_sem);
 
 exit:
-       fput(exe_file);
+       fdput(exe);
        return err;
 }
 
@@ -2204,7 +2207,7 @@ static int __orderly_poweroff(void)
                return -ENOMEM;
        }
 
-       ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_NO_WAIT,
+       ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_WAIT_EXEC,
                                      NULL, argv_cleanup, NULL);
        if (ret == -ENOMEM)
                argv_free(argv);