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Date: Sun, 11 Mar 2018 11:55:35 +0100 From: Dominik Brodowski <linux@...inikbrodowski.net> To: linux-kernel@...r.kernel.org, luto@...nel.org, torvalds@...ux-foundation.org, mingo@...nel.org, viro@...iv.linux.org.uk, akpm@...ux-foundation.org Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jiri Slaby <jslaby@...e.com>, x86@...nel.org Subject: [RFC PATCH 13/35] syscalls: do not call sys_ioperm() within the kernel While at it, use SYSCALL_DEFINE3() instead of a hand-crafted syscall definition. CC: Thomas Gleixner <tglx@...utronix.de> CC: Ingo Molnar <mingo@...hat.com> CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org> CC: Jiri Slaby <jslaby@...e.com> CC: x86@...nel.org Signed-off-by: Dominik Brodowski <linux@...inikbrodowski.net> --- arch/x86/include/asm/syscalls.h | 1 + arch/x86/kernel/ioport.c | 7 ++++++- drivers/tty/vt/vt_ioctl.c | 6 +++--- 3 files changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h index bad25bb80679..1c0bebbd039e 100644 --- a/arch/x86/include/asm/syscalls.h +++ b/arch/x86/include/asm/syscalls.h @@ -17,6 +17,7 @@ /* Common in X86_32 and X86_64 */ /* kernel/ioport.c */ +long ksys_ioperm(unsigned long from, unsigned long num, int turn_on); asmlinkage long sys_ioperm(unsigned long, unsigned long, int); asmlinkage long sys_iopl(unsigned int); diff --git a/arch/x86/kernel/ioport.c b/arch/x86/kernel/ioport.c index 2f723301eb58..0fe1c8782208 100644 --- a/arch/x86/kernel/ioport.c +++ b/arch/x86/kernel/ioport.c @@ -23,7 +23,7 @@ /* * this changes the io permissions bitmap in the current task. */ -asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on) +long ksys_ioperm(unsigned long from, unsigned long num, int turn_on) { struct thread_struct *t = ¤t->thread; struct tss_struct *tss; @@ -96,6 +96,11 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on) return 0; } +SYSCALL_DEFINE3(ioperm, unsigned long, from, unsigned long, num, int, turn_on) +{ + return ksys_ioperm(from, num, turn_on); +} + /* * sys_iopl has to be used when you want to access the IO ports * beyond the 0x3ff range: to get the full 65536 ports bitmapped 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 -- 2.16.2
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