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SubjectRe: 2.6.27.58-rc1 build error Re: [PATCH 21/23] hvc_console: Fix race between hvc_close and hvc_remove
On Tue, 08 Feb 2011 21:20:42 -0600
"Jayson R. King" <dev@jaysonking.com> wrote:

> drivers/char/hvc_console.c: In function 'hvc_open':
> drivers/char/hvc_console.c:315: error: implicit declaration of function
> 'tty_kref_get'
> drivers/char/hvc_console.c:324: warning: assignment makes pointer from
> integer without a cast
> drivers/char/hvc_console.c:341: error: implicit declaration of function
> 'tty_kref_put'
> drivers/char/hvc_console.c: In function 'hvc_poll':
> drivers/char/hvc_console.c:558: warning: assignment makes pointer from
> integer without a cast
> drivers/char/hvc_console.c: In function 'hvc_remove':
> drivers/char/hvc_console.c:759: warning: assignment makes pointer from
> integer without a cast
>
> I don't see a tty_kref_get or tty_kref_put on 2.6.27. Those functions
> first appeared in 2.6.28.

Correct - for 2.6.27 I don't think you *can* make the tty layer
non-exploitable without a major backport

Alan


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