From: Arnd Bergmann <arnd@arndb.de>
To: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Cc: y2038 Mailman List <y2038@lists.linaro.org>,
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Subject: Re: [PATCH 15/15] arch: add pkey and rseq syscall numbers everywhere
Date: Tue, 15 Jan 2019 15:47:14 +0100 [thread overview]
Message-ID: <CAK8P3a1Xb4z-mbhBTPZ0Cpy0Hy_s2wwT-8UG9yO6AGbUTjdkyw@mail.gmail.com> (raw)
In-Reply-To: <20190115115229.mcrmmpwdmjxf2cra@e5254000004ec.dyn.armlinux.org.uk>
On Tue, Jan 15, 2019 at 12:52 PM Russell King - ARM Linux admin
<linux@armlinux.org.uk> wrote:
>
> On Thu, Jan 10, 2019 at 05:24:35PM +0100, Arnd Bergmann wrote:
> > Most architectures define system call numbers for the rseq and pkey system
> > calls, even when they don't support the features, and perhaps never will.
> >
> > Only a few architectures are missing these, so just define them anyway
> > for consistency. If we decide to add them later to one of these, the
> > system call numbers won't get out of sync then.
>
> I was lambasted for adding the pkey syscalls for 32-bit ARM in 2016,
> which will probably never support it. Why has the attitude towards
> this kind of thing now apparently become acceptable?
I was (and still am) a bit unsure about this one. A number of architectures
added the numbers that won't ever support them, but I wasn't sure if
any of those that didn't add them might need it later.
I tried to just go by the rule that anything that we list in
asm-generic/unistd.h
is probably important enough that we want to list it everywhere, even if
that includes a couple that we end up being rather architecture specific.
I'm happy to drop this patch if you or others feel that we're better off
without it though.
Arnd
next prev parent reply other threads:[~2019-01-15 14:47 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-10 16:24 [PATCH 00/15] arch: synchronize syscall tables in preparation for y2038 Arnd Bergmann
2019-01-10 16:24 ` [PATCH 01/15] ia64: add __NR_umount2 definition Arnd Bergmann
2019-01-10 16:24 ` [PATCH 02/15] ia64: add statx and io_pgetevents syscalls Arnd Bergmann
2019-01-10 16:24 ` [PATCH 03/15] ia64: assign syscall numbers for perf and seccomp Arnd Bergmann
2019-01-10 16:24 ` [PATCH 04/15] alpha: wire up io_pgetevents system call Arnd Bergmann
2019-01-10 16:24 ` [PATCH 05/15] alpha: update syscall macro definitions Arnd Bergmann
2019-01-10 16:24 ` [PATCH 06/15] ARM: add migrate_pages() system call Arnd Bergmann
2019-01-10 16:32 ` Will Deacon
2019-01-10 17:11 ` Arnd Bergmann
2019-01-10 16:24 ` [PATCH 07/15] ARM: add kexec_file_load system call number Arnd Bergmann
2019-01-10 16:39 ` Will Deacon
2019-01-10 17:14 ` Arnd Bergmann
2019-01-10 16:24 ` [PATCH 08/15] m68k: assign syscall number for seccomp Arnd Bergmann
2019-01-10 16:24 ` [PATCH 09/15] sh: remove duplicate unistd_32.h file Arnd Bergmann
2019-01-10 16:24 ` [PATCH 10/15] sh: add statx system call Arnd Bergmann
2019-01-10 16:24 ` [PATCH 11/15] mips: fix n32 compat_ipc_parse_version Arnd Bergmann
2019-01-10 16:24 ` [PATCH 12/15] sparc64: fix sparc_ipc type conversion Arnd Bergmann
2019-01-10 16:24 ` [PATCH 13/15] ipc: rename old-style shmctl/semctl/msgctl syscalls Arnd Bergmann
2019-01-10 16:24 ` [PATCH 14/15] arch: add split IPC system calls where needed Arnd Bergmann
2019-01-10 20:32 ` Heiko Carstens
2019-01-11 17:33 ` Arnd Bergmann
2019-01-14 3:40 ` Michael Ellerman
2019-01-14 3:59 ` Michael Ellerman
2019-01-14 9:58 ` Michael Ellerman
2019-01-15 15:01 ` Arnd Bergmann
2019-01-15 15:18 ` Arnd Bergmann
2019-01-15 16:35 ` Geert Uytterhoeven
2019-01-15 21:24 ` Arnd Bergmann
2019-01-16 0:09 ` Michael Ellerman
2019-01-16 0:10 ` Michael Ellerman
2019-01-10 16:24 ` [PATCH 15/15] arch: add pkey and rseq syscall numbers everywhere Arnd Bergmann
2019-01-10 20:36 ` Heiko Carstens
2019-01-11 17:30 ` Arnd Bergmann
2019-01-14 8:31 ` Heiko Carstens
2019-01-15 11:52 ` Russell King - ARM Linux admin
2019-01-15 14:47 ` Arnd Bergmann [this message]
2019-01-10 16:59 ` [PATCH 00/15] arch: synchronize syscall tables in preparation for y2038 Geert Uytterhoeven
2019-01-10 17:06 ` Arnd Bergmann
2019-01-10 18:11 ` Geert Uytterhoeven
2019-01-10 22:43 ` Arnd Bergmann
2019-01-11 8:07 ` Geert Uytterhoeven
2019-01-10 18:10 ` Joseph Myers
2019-01-10 22:42 ` Arnd Bergmann
2019-01-10 23:14 ` Michael Cree
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