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From: Gilad Ben-Yossef <gilad@benyossef.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
	linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
	tglx@linutronix.de
Subject: Re: [RFC PATCH v1 14/31] ARC: syscall support
Date: Tue, 13 Nov 2012 12:13:23 +0200	[thread overview]
Message-ID: <CAOtvUMcc-7mBxYWEe7oypri7wxf58R8cph7EpdLYR_fLHO6eTg@mail.gmail.com> (raw)
In-Reply-To: <201211071421.39523.arnd@arndb.de>

On Wed, Nov 7, 2012 at 4:21 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Wednesday 07 November 2012, Vineet Gupta wrote:
>> + * Being uClibc based we need some of the deprecated syscalls:
>> + * -Not emulated by uClibc at all
>> + *     unlink, mkdir,... (needed by Busybox, LTP etc)
>> + *     times (needed by LTP pan test harness)
>> + * -Not emulated efficiently
>> + *     select: emulated using pselect (but extra code to chk usec > 1sec)
>> + *
> ...
> I'm pretty sure that this has been solved before, best get in contact with
> the maintainers of the openrisc/c6x/hexagon platforms, that probably all
> use uClibc without needing these.
>
> You have to remove the legacy calls here.

So, I completely agree about not adding more deprecated system call or
ABIs (thinking about the ptrace regset issues in another patch in the
same patchset), but on the other hand I have to wonder if having a
port in the tree that doesn't have a working C library or a debugger
makes sense.

I mean, it is not quite the same thing as saying: "well, users of the
old versions of the user tools will need to maintain out of tree
patches". That makes sense - it puts the burden of maintenance on
people clinging to new versions when newer one exists, but this is not
what is happening with Arc. Right now, there are no working version of
the tools for Arc, so everyone will need to use the out of tree
patches.

I wonder what is worse - having an in tree port that no one (can) use
or adding some deprecated crap (sorry...), clearly marked for deletion
the minute a version of the relevant user tools exists that can be
used with the new mechanisms?

Just my 2c as an Arc kernel port user,
Gilad



-- 
Gilad Ben-Yossef
Chief Coffee Drinker
gilad@benyossef.com
Israel Cell: +972-52-8260388
US Cell: +1-973-8260388
http://benyossef.com

"If you take a class in large-scale robotics, can you end up in a
situation where the homework eats your dog?"
 -- Jean-Baptiste Queru

  parent reply	other threads:[~2012-11-13 10:13 UTC|newest]

Thread overview: 141+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-11-07  9:47 [RFC Patch v1 00/31] Synopsys ARC Linux kernel Port Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 01/31] ARC: Generic Headers Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 02/31] ARC: irqflags Vineet Gupta
2012-11-12 19:50   ` Thomas Gleixner
2013-01-01  7:44     ` Vineet Gupta
2013-01-01  7:44       ` Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 03/31] ARC: atomic/bitops/cmpxchg/barriers Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 04/31] asm-generic headers: uaccess.h to conditionally define segment_eq() Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 05/31] ARC: uaccess friends Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 06/31] asm-generic headers: Allow yet more arch overrides in checksum.h Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 07/31] ARC: checksum/byteorder/swab routines Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 08/31] ARC: Fundamental ARCH data-types/defines Vineet Gupta
2012-11-08  7:10   ` Jonas Bonn
2012-11-08 18:52     ` Vineet Gupta
2012-11-08 20:36       ` Jonas Bonn
2012-11-12 13:58         ` Vineet Gupta
2012-11-12 14:12           ` Arnd Bergmann
2012-11-07  9:47 ` [RFC PATCH v1 09/31] ARC: spinlock/rwlock/mutex primitives Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 10/31] ARC: string library Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 11/31] ARC: Low level IRQ/Trap/Exception(non-MMU) Handling Vineet Gupta
2012-11-16  4:58   ` Al Viro
2012-12-27  9:00     ` Vineet Gupta
2012-12-27  9:00       ` Vineet Gupta
2012-12-27 13:29       ` Vineet Gupta
2012-12-27 13:29         ` Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 12/31] ARC: Interrupt Handling Vineet Gupta
2012-11-12 20:08   ` Thomas Gleixner
2013-01-01 10:46     ` Vineet Gupta
2013-01-01 10:46       ` Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 13/31] ARC: Non-MMU Exception Handling Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 14/31] ARC: syscall support Vineet Gupta
2012-11-07 14:21   ` Arnd Bergmann
2012-11-09  9:50     ` James Hogan
2012-11-09  9:50       ` James Hogan
2012-11-13 11:41       ` James Hogan
2012-11-13 11:41         ` James Hogan
2012-11-13 12:01         ` Jonas Bonn
2012-11-13 12:11           ` James Hogan
2012-11-13 12:11             ` James Hogan
2012-11-14 12:23             ` Arnd Bergmann
2012-11-14 12:31               ` James Hogan
2012-11-14 12:31                 ` James Hogan
2012-11-13 10:13     ` Gilad Ben-Yossef [this message]
2012-11-13 10:37       ` Arnd Bergmann
2012-11-15  6:15         ` Vineet Gupta
2012-11-15  6:15           ` Vineet Gupta
2012-11-15 12:35           ` Arnd Bergmann
2013-01-17  5:13             ` Vineet Gupta
2013-01-17  5:13               ` Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 15/31] ARC: Process/scheduling/clock/Timers/Delay Management Vineet Gupta
2012-11-12 20:29   ` Thomas Gleixner
2013-01-02  7:13     ` Vineet Gupta
2013-01-02  7:13       ` Vineet Gupta
2013-01-02  8:45       ` Vineet Gupta
2013-01-02  8:45         ` Vineet Gupta
2013-01-04 13:01       ` Frederic Weisbecker
2012-11-07  9:47 ` [RFC PATCH v1 16/31] ARC: Signal handling Vineet Gupta
2012-11-16  5:26   ` Al Viro
2012-12-28 12:34     ` Vineet Gupta
2012-12-28 12:34       ` Vineet Gupta
2012-12-28 12:42       ` [PATCH 1/2] ARC: [Review] Preparing to fix incorrect syscall restarts due to signals Vineet Gupta
2012-12-28 12:42         ` Vineet Gupta
2012-12-28 12:42         ` [PATCH 2/2] ARC: [Review] Prevent incorrect syscall restarts Vineet Gupta
2012-12-28 12:42           ` Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 17/31] ARC: Cache Flush Management Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 18/31] ARC: Page Table Management Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 19/31] ARC: MMU Context Management Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 20/31] ARC: MMU Exception Handling Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 21/31] ARC: TLB flush Handling Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 22/31] ARC: Page Fault handling (incl uaccess fixup) Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 23/31] ARC: I/O and DMA Mappings Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 24/31] ARC: startup #1: low-level, setup_arch(), /proc/cpuinfo, mem init Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 25/31] ARC: [plat-arcfpga] Hooking up platform to ARC UART Vineet Gupta
2012-11-07 14:16   ` Arnd Bergmann
2013-01-07 13:10     ` Vineet Gupta
2013-01-07 13:10       ` Vineet Gupta
2013-01-07 13:46       ` Arnd Bergmann
2013-01-07 14:04         ` Vineet Gupta
2013-01-07 14:04           ` Vineet Gupta
2013-01-07 14:36           ` Arnd Bergmann
2013-01-14  7:35     ` early init dt for earlyprintk (was Re: [RFC PATCH v1 25/31] ARC: [plat-arcfpga] Hooking up platform to ARC UART) Vineet Gupta
2013-01-14  7:35       ` Vineet Gupta
2013-01-14  9:48       ` James Hogan
2013-01-14  9:48         ` James Hogan
2013-01-14 10:09         ` Vineet Gupta
2013-01-14 10:09           ` Vineet Gupta
2013-01-14 10:54       ` Arnd Bergmann
2013-01-17  7:29     ` [RFC PATCH v1 25/31] ARC: [plat-arcfpga] Hooking up platform to ARC UART Vineet Gupta
2013-01-17  7:29       ` Vineet Gupta
2013-01-17 10:52       ` Arnd Bergmann
2012-11-07  9:47 ` [RFC PATCH v1 26/31] ARC: Build system: Makefiles, Kconfig, Linker script Vineet Gupta
2012-11-07 14:13   ` Arnd Bergmann
2013-01-02 14:30     ` Vineet Gupta
2013-01-02 14:48       ` Arnd Bergmann
2013-01-03  7:58         ` Vineet Gupta
2013-01-03  7:58           ` Vineet Gupta
2013-01-03  8:25           ` Arnd Bergmann
2013-03-11 12:29     ` SYSV IPC broken for no-legacy syscall kernels (was Re: [RFC PATCH v1 26/31] ARC: Build system: Makefiles, Kconfig, Linker script) Vineet Gupta
2013-03-11 12:29       ` Vineet Gupta
2013-03-11 12:44       ` James Hogan
2013-03-11 12:44         ` James Hogan
2013-03-11 12:56         ` Vineet Gupta
2013-03-11 12:56           ` Vineet Gupta
2013-03-11 13:07           ` James Hogan
2013-03-11 13:07             ` James Hogan
2013-03-11 13:30             ` Arnd Bergmann
2013-03-11 13:48               ` Vineet Gupta
2013-03-11 13:48                 ` Vineet Gupta
2013-03-11 14:50                 ` Arnd Bergmann
2012-11-15 17:49   ` [RFC PATCH v1 26/31] ARC: Build system: Makefiles, Kconfig, Linker script James Hogan
2012-11-15 17:49     ` James Hogan
2012-11-15 19:30     ` Ralf Baechle
2012-11-16  6:36       ` Vineet Gupta
2012-11-16  6:36         ` Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 27/31] ARC: Last bits (stubs) to get to a running kernel with UART Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 28/31] ARC: split ret_from_fork, simplify kernel_thread() Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 29/31] ARC: switch to generic kernel_thread() Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 30/31] ARC: switch to generic kernel_execve() and sys_execve() Vineet Gupta
2012-11-16  4:08   ` Al Viro
2012-11-17 14:01     ` Vineet Gupta
2012-11-17 14:01       ` Vineet Gupta
2012-11-07  9:47 ` [RFC PATCH v1 31/31] ARC: [plat-arcfpga] defconfig Vineet Gupta
2012-11-07 14:06   ` Arnd Bergmann
2012-11-12 14:18     ` James Hogan
2012-11-12 14:18       ` James Hogan
2012-11-12 14:21       ` Arnd Bergmann
2012-11-07 14:36 ` [RFC Patch v1 00/31] Synopsys ARC Linux kernel Port Arnd Bergmann
2012-11-08 19:09   ` Vineet Gupta
2012-11-07 20:46 ` Gilad Ben-Yossef
2012-11-20 13:47 ` Pavel Machek
2012-11-20 13:49   ` Vineet Gupta
2012-11-20 13:49     ` Vineet Gupta
2012-11-20 13:59   ` Pavel Machek
2012-11-20 14:17     ` Vineet Gupta
2012-11-20 14:17       ` Vineet Gupta
2013-01-18 19:46       ` Pavel Machek
2013-01-18 22:17         ` Arnd Bergmann
2013-01-19 10:15           ` Pavel Machek
2013-01-19 12:32         ` Vineet Gupta
2013-01-19 12:32           ` Vineet Gupta
2013-01-19 17:02           ` Pavel Machek

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