linux-kernel - Driver crash when changing a function from external to internal linkage

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Message-ID: <4C909696.5000503@cyconix.com>
Date:	Wed, 15 Sep 2010 10:49:10 +0100
From:	Evan Lavelle <sa212+lkml@...onix.com>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: Driver crash when changing a function from external to internal linkage

I have an ISR which schedules a tasklet to handle an interrupt.

The tasklet is function A, which calls function B, which calls function C.

When all of A, B, and C have extern linkage, there's no problem. 
However, when B is declared static, the driver crashes, and hangs up the 
machine. The driver only crashes if C contains any code; if it's just an 
empty function then there's no problem.

Any thoughts on what the problem is here? This is x86_32/PAE, 
2.6.18-53.el5PAE, gcc 4.1.2 (Red Hat 4.1.2-46).

Thanks -

Evan
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