[PATCH 178/208] x86/fpu: Rename restore_fpu_checking() to copy_fpstate_to_fpregs()

[Ingo Molnar]

fpu_restore_checking() is a helper function of restore_fpu_checking(),
but this is not apparent from the naming.

Both copy fpstate contents to fpregs, while the fuller variant does
a full copy without leaking information.

So rename them to:

    copy_fpstate_to_fpregs()
  __copy_fpstate_to_fpregs()

Cc: Andy Lutomirski <l...@amacapital.net>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: Fenghua Yu <fenghua...@intel.com>
Cc: H. Peter Anvin <h...@zytor.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Oleg Nesterov <o...@redhat.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
 arch/x86/include/asm/fpu/internal.h | 8 ++++----
 arch/x86/kernel/fpu/core.c          | 4 ++--
 arch/x86/kvm/x86.c                  | 2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/fpu/internal.h 
b/arch/x86/include/asm/fpu/internal.h
index 31bfda818f30..c09aea145e09 100644
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -289,7 +289,7 @@ static inline int copy_fpregs_to_fpstate(struct fpu *fpu)
 
 extern void fpu__save(struct fpu *fpu);
 
-static inline int fpu_restore_checking(struct fpu *fpu)
+static inline int __copy_fpstate_to_fpregs(struct fpu *fpu)
 {
        if (use_xsave())
                return fpu_xrstor_checking(&fpu->state.xsave);
@@ -299,7 +299,7 @@ static inline int fpu_restore_checking(struct fpu *fpu)
                return frstor_checking(&fpu->state.fsave);
 }
 
-static inline int restore_fpu_checking(struct fpu *fpu)
+static inline int copy_fpstate_to_fpregs(struct fpu *fpu)
 {
        /*
         * AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception is
@@ -314,7 +314,7 @@ static inline int restore_fpu_checking(struct fpu *fpu)
                        : : [addr] "m" (fpu->fpregs_active));
        }
 
-       return fpu_restore_checking(fpu);
+       return __copy_fpstate_to_fpregs(fpu);
 }
 
 /*
@@ -520,7 +520,7 @@ switch_fpu_prepare(struct fpu *old_fpu, struct fpu 
*new_fpu, int cpu)
 static inline void switch_fpu_finish(struct fpu *new_fpu, fpu_switch_t 
fpu_switch)
 {
        if (fpu_switch.preload) {
-               if (unlikely(restore_fpu_checking(new_fpu)))
+               if (unlikely(copy_fpstate_to_fpregs(new_fpu)))
                        fpu__reset(new_fpu);
        }
 }
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 11ec1b736172..72e3f02db40d 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -115,7 +115,7 @@ void __kernel_fpu_end(void)
        struct fpu *fpu = &current->thread.fpu;
 
        if (fpu->fpregs_active) {
-               if (WARN_ON(restore_fpu_checking(fpu)))
+               if (WARN_ON(copy_fpstate_to_fpregs(fpu)))
                        fpu__reset(fpu);
        } else {
                __fpregs_deactivate_hw();
@@ -338,7 +338,7 @@ void fpu__restore(void)
        /* Avoid __kernel_fpu_begin() right after fpregs_activate() */
        kernel_fpu_disable();
        fpregs_activate(fpu);
-       if (unlikely(restore_fpu_checking(fpu))) {
+       if (unlikely(copy_fpstate_to_fpregs(fpu))) {
                fpu__reset(fpu);
                force_sig_info(SIGSEGV, SEND_SIG_PRIV, tsk);
        } else {
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 5c61aae277f9..f4438179398b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7030,7 +7030,7 @@ void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
        kvm_put_guest_xcr0(vcpu);
        vcpu->guest_fpu_loaded = 1;
        __kernel_fpu_begin();
-       fpu_restore_checking(&vcpu->arch.guest_fpu);
+       __copy_fpstate_to_fpregs(&vcpu->arch.guest_fpu);
        trace_kvm_fpu(1);
 }
 
-- 
2.1.0

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