Am Donnerstag 14 April 2011, 09:49:14 schrieb Mikael Pettersson: > Richard Weinberger writes: > > 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? > > Please provide a standalone test case.
There you go! http://userweb.kernel.org/~rw/uml-gcc460/testcase.c Thanks, //richard ------------------------------------------------------------------------------ Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
