From: Russell King <rmk+lkml@arm.linux.org.uk>
To: karl malbrain <karl@petzent.com>
Cc: "Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.9 chrdev_open: serial_core: uart_open
Date: Fri, 15 Jul 2005 08:22:49 +0100 [thread overview]
Message-ID: <20050715082249.A23102@flint.arm.linux.org.uk> (raw)
In-Reply-To: <NDBBKFNEMLJBNHKPPFILMEAJCEAA.karl@petzent.com>; from karl@petzent.com on Thu, Jul 14, 2005 at 04:50:00PM -0700
On Thu, Jul 14, 2005 at 04:50:00PM -0700, karl malbrain wrote:
> chrdev_open issues a lock_kernel() before calling uart_open.
>
> It would appear that servicing the blocking open request uart_open goes to
> sleep with the kernel locked. Would this shut down subsequent access to
> opening "/dev/tty"???
No. lock_kernel() is automatically released when a process sleeps.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
next prev parent reply other threads:[~2005-07-15 7:23 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.61.0507130850110.18969@chaos.analogic.com>
2005-07-13 17:53 ` 2.6.9: serial_core: uart_open karl malbrain
2005-07-14 8:26 ` Russell King
2005-07-14 17:16 ` karl malbrain
2005-07-14 18:57 ` Russell King
2005-07-14 19:30 ` karl malbrain
2005-07-14 22:35 ` karl malbrain
2005-07-15 7:28 ` Russell King
2005-07-15 16:02 ` karl malbrain
2005-07-15 20:32 ` Russell King
2005-07-15 20:48 ` karl malbrain
2005-07-15 16:20 ` karl malbrain
2005-07-14 23:50 ` 2.6.9 chrdev_open: " karl malbrain
2005-07-15 7:22 ` Russell King [this message]
2005-07-15 20:11 ` karl malbrain
2005-07-15 20:30 ` Russell King
2005-07-15 20:52 ` karl malbrain
2005-07-15 20:58 ` Russell King
2005-07-15 21:17 ` karl malbrain
2005-07-15 21:54 ` Russell King
2005-07-15 22:02 ` karl malbrain
2005-07-16 0:18 ` Alan Cox
2005-07-26 20:45 ` karl malbrain
2005-07-16 0:12 ` Alan Cox
2005-07-16 22:27 ` Matthias Urlichs
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