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Bug #7922
openProblem with kernel config in linux:bitops (old 129_1a) rule
Status:
New
Priority:
Normal
Assignee:
-
Category:
Requirement specifications
Target version:
-
Start date:
01/27/2017
Due date:
% Done:
0%
Estimated time:
Detected in build:
svn
Platform:
Published in build:
Description
This rule depends on kernel parameter CONFIG_NR_CPUS, which is used for global constant
extern int nr_cpu_ids;
In allmodconfig this constant is quite big (8192), but if we reduce it (for example, up to 10), nr_cpu_ids can be taken greater, which leads to false positives for this rule.
Therefore current expression
ldv_assume(nr_cpu_ids > 0);
does not work, since we need to add upper bound as well.
The question is which value will be safe there for any config, which will not lead to missed bugs in general case.
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