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From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Xenomai <xenomai@xenomai.org>
Subject: [Xenomai] __get_user/__put_user
Date: Sat, 16 Mar 2013 21:19:53 +0100	[thread overview]
Message-ID: <5144D3E9.2050205@xenomai.org> (raw)


Hi,

xenomai asm-generic/syscall.h defines __xn_put_user/__xn_get_user as
aliases for __put_user/__get_user, which implementation, for the ARM
architecture calls might_fault() which triggers an ipipe_root_only() check.

So, the question is, what is the best way of avoiding this issue? Remove
the call to might_fault() when compiling with CONFIG_IPIPE enabled?
Define __ipipe_safe_put_user which avoids the call to might_fault() ?

Thanks in advance.

-- 
                                                                Gilles.


             reply	other threads:[~2013-03-16 20:19 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-16 20:19 Gilles Chanteperdrix [this message]
2013-03-16 20:25 ` [Xenomai] __get_user/__put_user Jan Kiszka
2013-03-16 20:27   ` Gilles Chanteperdrix
2013-03-16 20:28     ` Jan Kiszka
2013-03-16 20:50       ` Gilles Chanteperdrix
2013-05-09 17:32         ` Gilles Chanteperdrix
2013-05-09 17:58           ` Jan Kiszka
2013-05-09 18:02             ` Gilles Chanteperdrix
2013-05-09 18:02               ` Jan Kiszka
2013-05-09 18:03                 ` Gilles Chanteperdrix
2013-05-09 18:11                   ` Jan Kiszka
2013-05-09 18:27                     ` Gilles Chanteperdrix
2013-05-09 18:34                       ` Jan Kiszka
2013-05-09 18:36                         ` Gilles Chanteperdrix
2013-05-09 18:41                           ` Jan Kiszka
2013-05-09 19:08                             ` Gilles Chanteperdrix
2013-05-09 19:23                               ` Jan Kiszka
2013-05-09 19:16                             ` Gilles Chanteperdrix
2013-05-09 19:20                               ` Jan Kiszka
2013-05-09 19:20                               ` Philippe Gerum
2013-05-09 19:29                                 ` Jan Kiszka
2013-05-10 13:16                                 ` Gilles Chanteperdrix
2013-05-10 13:20                                   ` Jan Kiszka

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