Bug 18582

Summary:	gentoo-sources-2.4.20: cs4281 module has undefined __bad_udelay symbol
Product:	Gentoo Linux	Reporter:	Simon Marlow <simonmar>
Component:	[OLD] Core system	Assignee:	Gentoo Linux bug wranglers <bug-wranglers>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	High
Version:	unspecified
Hardware:	x86
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Simon Marlow 2003-04-01 07:49:20 UTC

Compiling gentoo-sources-2.4.20 (r1 & r2) with the cs4281 sound module 
enabled, gives a cs4281.o that contains an undefined __bad_udelay symbol.

Digging a bit deeper, this seems to be a bug in the cs4281 driver itself which 
is exposed by compiling with -finline-functions on (the default with -03).  
The function delayus() in this module gets inlined, exposing some calls to 
udelay() with over-long timeouts.

Reproducible: Always
Steps to Reproduce:
1. Configure gentoo-sources-2.4.20 kernel to enable the cs4281 driver
2. Compile it
3. Observe link failure

or, alternatively, compile cs4281 as a module and observe the error when you 
do 'depmod -ae' on the resulting modules.
Actual Results:  
I got a link failure due to an undefined __bad_udelay symbol.


I can work around it by turning the optimisation level in the kernel down to -
O2.

Comment 1 Martin Holzer (RETIRED) gentoo-dev

2003-04-01 08:57:31 UTC


*** This bug has been marked as a duplicate of 18482 ***