[patch V2 22/52] x86/fpu: Rename copy_xregs_to_kernel() and copy_kernel_to_xregs()

[Thomas Gleixner <tglx@linutronix.de>]

The function names for xsave[s]/xrstor[s] operations are horribly named and
a permanent source of confusion.

Rename:
	copy_xregs_to_kernel() to xsave_to_kernel()
	copy_kernel_to_xregs() to xrstor_from_kernel()

so it's entirely clear what this is about.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/x86/include/asm/fpu/internal.h |   10 +++++-----
 arch/x86/kernel/fpu/core.c          |    6 +++---
 arch/x86/kernel/fpu/signal.c        |   14 +++++++-------
 arch/x86/kernel/fpu/xstate.c        |    2 +-
 4 files changed, 16 insertions(+), 16 deletions(-)

--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -264,7 +264,7 @@ static inline void fxsave_to_kernel(stru
  * This function is called only during boot time when x86 caps are not set
  * up and alternative can not be used yet.
  */
-static inline void copy_kernel_to_xregs_booting(struct xregs_state *xstate)
+static inline void xrstor_from_kernel_booting(struct xregs_state *xstate)
 {
 	u64 mask = -1;
 	u32 lmask = mask;
@@ -288,7 +288,7 @@ static inline void copy_kernel_to_xregs_
 /*
  * Save processor xstate to xsave area.
  */
-static inline void copy_xregs_to_kernel(struct xregs_state *xstate)
+static inline void xsave_to_kernel(struct xregs_state *xstate)
 {
 	u64 mask = xfeatures_mask_all;
 	u32 lmask = mask;
@@ -306,7 +306,7 @@ static inline void copy_xregs_to_kernel(
 /*
  * Restore processor xstate from xsave area.
  */
-static inline void copy_kernel_to_xregs(struct xregs_state *xstate, u64 mask)
+static inline void xrstor_from_kernel(struct xregs_state *xstate, u64 mask)
 {
 	u32 lmask = mask;
 	u32 hmask = mask >> 32;
@@ -367,7 +367,7 @@ static inline int copy_user_to_xregs(str
  * Restore xstate from kernel space xsave area, return an error code instead of
  * an exception.
  */
-static inline int copy_kernel_to_xregs_err(struct xregs_state *xstate, u64 mask)
+static inline int xrstor_from_kernel_err(struct xregs_state *xstate, u64 mask)
 {
 	u32 lmask = mask;
 	u32 hmask = mask >> 32;
@@ -386,7 +386,7 @@ extern int copy_fpregs_to_fpstate(struct
 static inline void __copy_kernel_to_fpregs(union fpregs_state *fpstate, u64 mask)
 {
 	if (use_xsave()) {
-		copy_kernel_to_xregs(&fpstate->xsave, mask);
+		xrstor_from_kernel(&fpstate->xsave, mask);
 	} else {
 		if (use_fxsr())
 			copy_kernel_to_fxregs(&fpstate->fxsave);
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -95,7 +95,7 @@ EXPORT_SYMBOL(irq_fpu_usable);
 int copy_fpregs_to_fpstate(struct fpu *fpu)
 {
 	if (likely(use_xsave())) {
-		copy_xregs_to_kernel(&fpu->state.xsave);
+		xsave_to_kernel(&fpu->state.xsave);
 
 		/*
 		 * AVX512 state is tracked here because its use is
@@ -358,7 +358,7 @@ void fpu__drop(struct fpu *fpu)
 static inline void copy_init_fpstate_to_fpregs(u64 features_mask)
 {
 	if (use_xsave())
-		copy_kernel_to_xregs(&init_fpstate.xsave, features_mask);
+		xrstor_from_kernel(&init_fpstate.xsave, features_mask);
 	else if (static_cpu_has(X86_FEATURE_FXSR))
 		copy_kernel_to_fxregs(&init_fpstate.fxsave);
 	else
@@ -389,7 +389,7 @@ static void fpu__clear(struct fpu *fpu,
 	if (user_only) {
 		if (!fpregs_state_valid(fpu, smp_processor_id()) &&
 		    xfeatures_mask_supervisor())
-			copy_kernel_to_xregs(&fpu->state.xsave,
+			xrstor_from_kernel(&fpu->state.xsave,
 					     xfeatures_mask_supervisor());
 		copy_init_fpstate_to_fpregs(xfeatures_mask_user());
 	} else {
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -271,14 +271,14 @@ static int copy_user_to_fpregs_zeroing(v
 
 			r = copy_user_to_fxregs(buf);
 			if (!r)
-				copy_kernel_to_xregs(&init_fpstate.xsave, init_bv);
+				xrstor_from_kernel(&init_fpstate.xsave, init_bv);
 			return r;
 		} else {
 			init_bv = xfeatures_mask_user() & ~xbv;
 
 			r = copy_user_to_xregs(buf, xbv);
 			if (!r && unlikely(init_bv))
-				copy_kernel_to_xregs(&init_fpstate.xsave, init_bv);
+				xrstor_from_kernel(&init_fpstate.xsave, init_bv);
 			return r;
 		}
 	} else if (use_fxsr()) {
@@ -367,7 +367,7 @@ static int __fpu__restore_sig(void __use
 			 */
 			if (test_thread_flag(TIF_NEED_FPU_LOAD) &&
 			    xfeatures_mask_supervisor())
-				copy_kernel_to_xregs(&fpu->state.xsave,
+				xrstor_from_kernel(&fpu->state.xsave,
 						     xfeatures_mask_supervisor());
 			fpregs_mark_activate();
 			fpregs_unlock();
@@ -422,7 +422,7 @@ static int __fpu__restore_sig(void __use
 		 * above XRSTOR failed or ia32_fxstate is true. Shrug.
 		 */
 		if (xfeatures_mask_supervisor())
-			copy_xregs_to_kernel(&fpu->state.xsave);
+			xsave_to_kernel(&fpu->state.xsave);
 		set_thread_flag(TIF_NEED_FPU_LOAD);
 	}
 	__fpu_invalidate_fpregs_state(fpu);
@@ -440,13 +440,13 @@ static int __fpu__restore_sig(void __use
 
 		fpregs_lock();
 		if (unlikely(init_bv))
-			copy_kernel_to_xregs(&init_fpstate.xsave, init_bv);
+			xrstor_from_kernel(&init_fpstate.xsave, init_bv);
 
 		/*
 		 * Restore previously saved supervisor xstates along with
 		 * copied-in user xstates.
 		 */
-		ret = copy_kernel_to_xregs_err(&fpu->state.xsave,
+		ret = xrstor_from_kernel_err(&fpu->state.xsave,
 					       user_xfeatures | xfeatures_mask_supervisor());
 
 	} else if (use_fxsr()) {
@@ -464,7 +464,7 @@ static int __fpu__restore_sig(void __use
 			u64 init_bv;
 
 			init_bv = xfeatures_mask_user() & ~XFEATURE_MASK_FPSSE;
-			copy_kernel_to_xregs(&init_fpstate.xsave, init_bv);
+			xrstor_from_kernel(&init_fpstate.xsave, init_bv);
 		}
 
 		ret = copy_kernel_to_fxregs_err(&fpu->state.fxsave);
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -411,7 +411,7 @@ static void __init setup_init_fpu_buf(vo
 	/*
 	 * Init all the features state with header.xfeatures being 0x0
 	 */
-	copy_kernel_to_xregs_booting(&init_fpstate.xsave);
+	xrstor_from_kernel_booting(&init_fpstate.xsave);
 
 	/*
 	 * All components are now in init state. Read the state back so