Messages in this thread Patch in this message | | | Date | Wed, 27 May 2015 07:21:15 -0700 | From | "tip-bot for Luis R. Rodriguez" <> | Subject | [tip:x86/mm] x86/mm/pat: Export pat_enabled() |
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Commit-ID: fbe7193aa4787f27c84216d130ab877efc310d57 Gitweb: http://git.kernel.org/tip/fbe7193aa4787f27c84216d130ab877efc310d57 Author: Luis R. Rodriguez <mcgrof@suse.com> AuthorDate: Tue, 26 May 2015 10:28:16 +0200 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Wed, 27 May 2015 14:41:02 +0200
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 <mcgrof@suse.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Walls <awalls@md.metrocast.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Dave Airlie <airlied@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Doug Ledford <dledford@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> 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 <mingo@kernel.org> --- 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 484dce7..a1c9654 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;
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