From: "Luis R. Rodriguez" <mcg...@suse.com> Two Linux device drivers cannot work with PAT and the work required to make them work is significant. There is not enough motivation to convert these drivers over to use PAT properly, the compromise reached is to let drivers that cannot be ported to PAT check if PAT was enabled and if so fail on probe with a recommendation to boot with the "nopat" kernel parameter.
Signed-off-by: Luis R. Rodriguez <mcg...@suse.com> Cc: Andy Walls <awa...@md.metrocast.net> Cc: Doug Ledford <dledf...@redhat.com> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Ingo Molnar <mi...@elte.hu> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Juergen Gross <jgr...@suse.com> Cc: Daniel Vetter <daniel.vet...@ffwll.ch> Cc: Dave Airlie <airl...@redhat.com> Cc: Bjorn Helgaas <bhelg...@google.com> Cc: Michael S. Tsirkin <m...@redhat.com> Link: http://lkml.kernel.org/r/1430425520-22275-4-git-send-email-mcg...@do-not-panic.com Signed-off-by: Borislav Petkov <b...@suse.de> --- arch/x86/mm/pat.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 484dce7f759b..a1c96544099d 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -55,6 +55,7 @@ bool pat_enabled(void) { return !!__pat_enabled; } +EXPORT_SYMBOL_GPL(pat_enabled); int pat_debug_enable; -- 1.9.0.258.g00eda23 -- 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/
