Messages in this thread |  | | From | Richard Weinberger <> | Subject | gcc-4.6.0 generates no code for sub_preempt_count() | Date | Wed, 13 Apr 2011 21:50:05 +0200 |
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Hi,
I'm facing a very strange issue with gcc-4.6.0 and UML. Within __local_bh_enable() gcc generates no code for sub_preempt_count().
See: http://userweb.kernel.org/~rw/uml-gcc460/__local_bh_enable-gcc460.txt vs. http://userweb.kernel.org/~rw/uml-gcc460/__local_bh_enable-gcc431.txt
Interestingly it generates code for add_preempt_count(). I can reproduce this on x86 and x86_64.
The problem has to do with UML's current_thread_info() function. When I replace it with arch/x86's (unportable) variant gcc generates code.
Any ideas whether this is a gcc or a kernel issue? Thanks, //richard
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