x86/ioport: add ksys_ioperm() helper; remove in-kernel calls to sys_ioperm()

Using this helper allows us to avoid the in-kernel calls to the
sys_ioperm() syscall. The ksys_ prefix denotes that this function is meant
as a drop-in replacement for the syscall. In particular, it uses the same
calling convention as sys_ioperm().

This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net

Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: x86@kernel.org
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index d61be307256a..a78ad10a119b 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -57,7 +57,7 @@ extern struct tty_driver *console_driver;
  */
 
 #ifdef CONFIG_X86
-#include <linux/syscalls.h>
+#include <asm/syscalls.h>
 #endif
 
 static void complete_change_console(struct vc_data *vc);
@@ -420,12 +420,12 @@ int vt_ioctl(struct tty_struct *tty,
                         ret = -EINVAL;
                         break;
                 }
-                ret = sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0;
+                ret = ksys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0;
                 break;
 
         case KDENABIO:
         case KDDISABIO:
-                ret = sys_ioperm(GPFIRST, GPNUM,
+                ret = ksys_ioperm(GPFIRST, GPNUM,
                                   (cmd == KDENABIO)) ? -ENXIO : 0;
                 break;
 #endif