Messages in this thread | | | Date | Thu, 12 Jan 2012 07:29:12 -0800 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH] rcu: avoid checking for constant |
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On Thu, Jan 12, 2012 at 11:57:10AM +0100, Jan Engelhardt wrote: > On Thursday 2012-01-12 11:54, Eric Dumazet wrote: > > >Le jeudi 12 janvier 2012 à 11:34 +0100, Jan Engelhardt a écrit : > > > >> When compiling kernel or module code with -O0, "offset" is no longer > >> considered a constant, and therefore always triggers the build error > >> that BUILD_BUG_ON is defined to yield. > > > >Why compiling kernel with -O0 is even considered ? > > The compile error was observed when trying to compile an out-of-tree > module with -O0.
Hmmm... Why not have a glue .c file in your out-of-tree module that contains function like:
void kfree_rcu_foo(struct foo *fp) { kfree_rcu(fp, foo_rcu); }
Compile this .c file normally, then apply -O0 only to the other files in your module.
Thanx, Paul
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