66f4e88cc6
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>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
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* syscalls.h - Linux syscall interfaces (arch-specific)
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*
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* Copyright (c) 2008 Jaswinder Singh Rajput
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*
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* This file is released under the GPLv2.
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* See the file COPYING for more details.
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*/
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#ifndef _ASM_X86_SYSCALLS_H
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#define _ASM_X86_SYSCALLS_H
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#include <linux/compiler.h>
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#include <linux/linkage.h>
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#include <linux/signal.h>
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#include <linux/types.h>
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/* Common in X86_32 and X86_64 */
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/* kernel/ioport.c */
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long ksys_ioperm(unsigned long from, unsigned long num, int turn_on);
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asmlinkage long sys_ioperm(unsigned long, unsigned long, int);
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asmlinkage long sys_iopl(unsigned int);
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/* kernel/ldt.c */
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asmlinkage long sys_modify_ldt(int, void __user *, unsigned long);
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/* kernel/signal.c */
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asmlinkage long sys_rt_sigreturn(void);
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/* kernel/tls.c */
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asmlinkage long sys_set_thread_area(struct user_desc __user *);
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asmlinkage long sys_get_thread_area(struct user_desc __user *);
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/* X86_32 only */
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#ifdef CONFIG_X86_32
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/* kernel/signal.c */
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asmlinkage unsigned long sys_sigreturn(void);
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/* kernel/vm86_32.c */
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struct vm86_struct;
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asmlinkage long sys_vm86old(struct vm86_struct __user *);
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asmlinkage long sys_vm86(unsigned long, unsigned long);
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#else /* CONFIG_X86_32 */
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/* X86_64 only */
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/* kernel/process_64.c */
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asmlinkage long sys_arch_prctl(int, unsigned long);
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/* kernel/sys_x86_64.c */
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asmlinkage long sys_mmap(unsigned long, unsigned long, unsigned long,
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unsigned long, unsigned long, unsigned long);
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#endif /* CONFIG_X86_32 */
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#endif /* _ASM_X86_SYSCALLS_H */
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