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700d3a5a66
Revert45e29d119e("x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long") and add a comment to discourage someone else from making the same mistake again. It turns out that some user code fails to compile if __X32_SYSCALL_BIT is unsigned long. See, for example [1] below. [ bp: Massage and do the same thing in the respective tools/ header. ] Fixes:45e29d119e("x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long") Reported-by: Thorsten Glaser <t.glaser@tarent.de> Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: stable@kernel.org Link: [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=954294 Link: https://lkml.kernel.org/r/92e55442b744a5951fdc9cfee10badd0a5f7f828.1588983892.git.luto@kernel.org
25 lines
664 B
C
25 lines
664 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_ASM_X86_UNISTD_H
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#define _UAPI_ASM_X86_UNISTD_H
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/*
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* x32 syscall flag bit. Some user programs expect syscall NR macros
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* and __X32_SYSCALL_BIT to have type int, even though syscall numbers
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* are, for practical purposes, unsigned long.
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*
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* Fortunately, expressions like (nr & ~__X32_SYSCALL_BIT) do the right
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* thing regardless.
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*/
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#define __X32_SYSCALL_BIT 0x40000000
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#ifndef __KERNEL__
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# ifdef __i386__
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# include <asm/unistd_32.h>
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# elif defined(__ILP32__)
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# include <asm/unistd_x32.h>
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# else
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# include <asm/unistd_64.h>
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# endif
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#endif
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#endif /* _UAPI_ASM_X86_UNISTD_H */
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