[PATCH] x86/fpu/xstate: Export fpu_fpregs_owner_ctx

* [PATCH] x86/fpu/xstate: Export fpu_fpregs_owner_ctx
@ 2019-12-06 23:17 Yu-cheng Yu
  2019-12-06 23:51 ` Borislav Petkov
  0 siblings, 1 reply; 3+ messages in thread
From: Yu-cheng Yu @ 2019-12-06 23:17 UTC (permalink / raw)
  To: linux-kernel, x86, H. Peter Anvin, Thomas Gleixner, Ingo Molnar,
	Dave Hansen, Tony Luck, Andy Lutomirski, Borislav Petkov,
	Rik van Riel, Ravi V. Shankar, Sebastian Andrzej Siewior,
	Fenghua Yu, Peter Zijlstra
  Cc: Yu-cheng Yu

After applying my "Invalidate fpregs when __fpu_restore_sig() fails"
patch [1], the following happens:

    ERROR: "fpu_fpregs_owner_ctx" [arch/x86/kvm/kvm.ko] undefined!

Fix it by exporting the symbol.  I apologize for missing this!

[1] https://lkml.kernel.org/r/20191205182648.32257-4-yu-cheng.yu@intel.com/

Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
---
 arch/x86/kernel/fpu/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 743ff5ea4076..4e5151e43a2c 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -42,6 +42,7 @@ static DEFINE_PER_CPU(bool, in_kernel_fpu);
  * Track which context is using the FPU on the CPU:
  */
 DEFINE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx);
+EXPORT_SYMBOL_GPL(fpu_fpregs_owner_ctx);
 
 static bool kernel_fpu_disabled(void)
 {
-- 
2.17.1


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