Bug 87593 - kernel oprofile modules does not compile for UP kernel
Summary: kernel oprofile modules does not compile for UP kernel
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel
Version: 9
Hardware: i386
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Arjan van de Ven
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2003-03-29 16:17 UTC by greg hosler
Modified: 2007-04-18 16:52 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2003-12-17 00:21:18 UTC


Attachments (Terms of Use)

Description greg hosler 2003-03-29 16:17:28 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030225

Description of problem:
The kernel oprofile modules contains references to cpu_possible
which is only defines in include/asm-i386/smp.h, and include/asm-x86_64/smp.h,
making it impossible to build an oprofile kernel module for a UP kernel w/o
getting the following error message from depmod:

depmod: *** Unresolved symbols in   
/lib/modules/2.4.20-8custom/kernel/arch/i386/oprofile/oprofile.o
depmod:         cpu_possible

specifically, the following files reference cpu_possible():

    drivers/oprofile/buffer_sync.c
    drivers/oprofile/cpu_buffer.c
    drivers/oprofile/oprofile_stats.c

cpu_possible() needs to be defined in such a manner that the UP kernel builds
will compile these modules w/o undefined references.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. on a UP machine, make xconfig, and enable profiling
2. build kernel, and modules, and module_install
3. observe the error message "*** Unresolved symbols in   
/lib/modules/2.4.20-8custom/kernel/arch/i386/oprofile/oprofile.o
depmod:         cpu_possible"

    

Actual Results:  unloadable oprofile module

Expected Results:  a loadable oprofile module

Additional info:

Comment 1 Arjan van de Ven 2003-03-30 13:36:55 UTC
oprofile has other issues for UP as well, that's why disabled it


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