Re: [tip:x86/asm] x86/syscalls: Remove __SYSCALL_COMMON and __SYSCALL_X32
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- Subject: Re: [tip:x86/asm] x86/syscalls: Remove __SYSCALL_COMMON and __SYSCALL_X32
- From: Ingo Molnar <mingo@xxxxxxxxxx>
- Date: Sat, 30 Jan 2016 10:31:24 +0100
- Cc: Brian Gerst <brgerst@xxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, "linux-tip-commits@xxxxxxxxxxxxxxx" <linux-tip-commits@xxxxxxxxxxxxxxx>, tip-bot for Andy Lutomirski <tipbot@xxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Denys Vlasenko <dvlasenk@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Frédéric Weisbecker <fweisbec@xxxxxxxxx>
- In-reply-to: <CALCETrWJarxEuH4_hjPzrQ4Uf+bFqy1jf=96VoezRznAy9OAAQ@mail.gmail.com>
- User-agent: Mutt/1.5.23 (2014-03-12)
* Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:
> >>>+ if [ "$abi" == "COMMON" -o "$abi" == "64" ]; then
> >>>+ # COMMON is the same as 64, except that we don't expect X32
> >>>+ # programs to use it. Our expectation has nothing to do with
> >>>+ # any generated code, so treat them the same.
> >>>+ emit 64 "$nr" "$entry" "$compat"
> >>>+ elif [ "$abi" == "X32" ]; then
> >>>+ # X32 is equivalent to 64 on an X32-compatible kernel.
> >>>+ echo "#ifdef CONFIG_X86_X32_ABI"
> >>>+ emit 64 "$nr" "$entry" "$compat"
> >>>+ echo "#endif"
> >>>+ elif [ "$abi" == "I386" ]; then
> >>>+ emit "$abi" "$nr" "$entry" "$compat"
> >>>+ else
> >>>+ echo "Unknown abi $abi" >&2
> >>>+ exit 1
> >>>+ fi
> No combinatorial explosion, please. We could use __SYSCALL(nr, sym,
> abi, qual), though.
Mind fixing it, so that we get back the arch-neutral property?
Thanks,
Ingo
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