From fbe7193aa4787f27c84216d130ab877efc310d57 Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Tue, 26 May 2015 10:28:16 +0200 Subject: [PATCH] x86/mm/pat: Export pat_enabled() 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 Signed-off-by: Borislav Petkov Cc: Andy Lutomirski Cc: Andy Walls Cc: Bjorn Helgaas Cc: Borislav Petkov Cc: Brian Gerst Cc: Daniel Vetter Cc: Dave Airlie Cc: Denys Vlasenko Cc: Doug Ledford Cc: H. Peter Anvin Cc: Juergen Gross Cc: Linus Torvalds Cc: Michael S. Tsirkin Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1430425520-22275-4-git-send-email-mcgrof@do-not-panic.com Link: http://lkml.kernel.org/r/1432628901-18044-14-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar --- 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; -- 2.30.2