On Tue, May 05, 2015 at 07:58:30PM +0200, Ingo Molnar wrote: > There are various internal FPU state debugging checks that never > trigger in practice, but which are useful for FPU code development. > > Separate these out into CONFIG_X86_DEBUG_FPU=y, and also add a > couple of new ones. > > The size difference is about 0.5K of code on defconfig: > > text data bss filename > 15028906 2578816 1638400 vmlinux > 15029430 2578816 1638400 vmlinux > > ( Keep this enabled by default until the new FPU code is debugged. ) > > Cc: Andy Lutomirski <l...@amacapital.net> > Cc: Borislav Petkov <b...@alien8.de> > Cc: Dave Hansen <dave.han...@linux.intel.com> > Cc: Fenghua Yu <fenghua...@intel.com> > Cc: H. Peter Anvin <h...@zytor.com> > Cc: Linus Torvalds <torva...@linux-foundation.org> > Cc: Oleg Nesterov <o...@redhat.com> > Cc: Thomas Gleixner <t...@linutronix.de> > Signed-off-by: Ingo Molnar <mi...@kernel.org>
... > diff --git a/arch/x86/include/asm/fpu/internal.h > b/arch/x86/include/asm/fpu/internal.h > index a4c1b7dbf70e..d2a281bd5f45 100644 > --- a/arch/x86/include/asm/fpu/internal.h > +++ b/arch/x86/include/asm/fpu/internal.h > @@ -59,6 +59,15 @@ extern void fpu__clear(struct fpu *fpu); > extern void fpu__init_check_bugs(void); > extern void fpu__resume_cpu(void); > > +/* > + * Debugging facility: > + */ > +#ifdef CONFIG_X86_DEBUG_FPU > +# define WARN_ON_FPU(x) WARN_ON_ONCE(x) > +#else > +# define WARN_ON_FPU(x) ({ 0; }) Shouldn't this be called FPU_WARN_ON() ? -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. -- -- 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/