On 03/05, Oleg Nesterov wrote: > > And this also means I have another off-topic fix for 4.0/stable, will > send a patch in a minute...
I knew about this problem, but I didn't realize that restore_sigcontext() can call a sleeping function after math_state_restore(). So I was going to fix this later, because we need a lot more cleanups in these paths. But it turns out, it is trivial to trigger the "BUG: sleeping function called from invalid context" warning, see the test-case I sent to Dave. To avoid the confusion, this has nothing to do with the problems we discuss in other threads, or with the recent changes in tip/x86/fpu. The patch is horrible, yes. But simple, and math_state_restore/init_fpu are already horrible and need the cleanups. Hopefully I'll send them "soon". Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
