Bug 87593

Summary: kernel oprofile modules does not compile for UP kernel
Product: [Retired] Red Hat Linux Reporter: greg hosler <greg>
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED WONTFIX QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 9   
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2003-12-17 00:21:18 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description greg hosler 2003-03-29 16:17:28 UTC
From Bugzilla Helper:
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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