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-rw-r--r--arch/x86/include/asm/fpu/api.h10
-rw-r--r--arch/x86/kernel/fpu/core.c29
2 files changed, 0 insertions, 39 deletions
diff --git a/arch/x86/include/asm/fpu/api.h b/arch/x86/include/asm/fpu/api.h
index 1429a7c736db..0877ae018fc9 100644
--- a/arch/x86/include/asm/fpu/api.h
+++ b/arch/x86/include/asm/fpu/api.h
@@ -27,16 +27,6 @@ extern void kernel_fpu_end(void);
extern bool irq_fpu_usable(void);
/*
- * Some instructions like VIA's padlock instructions generate a spurious
- * DNA fault but don't modify SSE registers. And these instructions
- * get used from interrupt context as well. To prevent these kernel instructions
- * in interrupt context interacting wrongly with other user/kernel fpu usage, we
- * should use them only in the context of irq_ts_save/restore()
- */
-extern int irq_ts_save(void);
-extern void irq_ts_restore(int TS_state);
-
-/*
* Query the presence of one or more xfeatures. Works on any legacy CPU as well.
*
* If 'feature_name' is set then put a human-readable description of
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 52f5684405c1..7d8e2628e82c 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -138,35 +138,6 @@ void kernel_fpu_end(void)
EXPORT_SYMBOL_GPL(kernel_fpu_end);
/*
- * CR0::TS save/restore functions:
- */
-int irq_ts_save(void)
-{
- /*
- * If in process context and not atomic, we can take a spurious DNA fault.
- * Otherwise, doing clts() in process context requires disabling preemption
- * or some heavy lifting like kernel_fpu_begin()
- */
- if (!in_atomic())
- return 0;
-
- if (read_cr0() & X86_CR0_TS) {
- clts();
- return 1;
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(irq_ts_save);
-
-void irq_ts_restore(int TS_state)
-{
- if (TS_state)
- stts();
-}
-EXPORT_SYMBOL_GPL(irq_ts_restore);
-
-/*
* Save the FPU state (mark it for reload if necessary):
*
* This only ever gets called for the current task.