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Subject[PATCH 01/33] x86/fpu: Rename copyin_to_xsaves()/copyout_from_xsaves() to copy_user_to_xstate()/copy_xstate_to_user()
Date
The 'copyin/copyout' nomenclature needlessly departs from what the modern FPU code
uses, which is:

copy_fpregs_to_fpstate()
copy_fpstate_to_sigframe()
copy_fregs_to_user()
copy_fxregs_to_kernel()
copy_fxregs_to_user()
copy_kernel_to_fpregs()
copy_kernel_to_fregs()
copy_kernel_to_fxregs()
copy_kernel_to_xregs()
copy_user_to_fregs()
copy_user_to_fxregs()
copy_user_to_xregs()
copy_xregs_to_kernel()
copy_xregs_to_user()

I.e. according to this pattern, the following rename should be done:

copyin_to_xsaves() -> copy_user_to_xstate()
copyout_from_xsaves() -> copy_xstate_to_user()

or, if we want to be pedantic, denote that that the user-space format is ptrace:

copyin_to_xsaves() -> copy_user_ptrace_to_xstate()
copyout_from_xsaves() -> copy_xstate_to_user_ptrace()

But I'd suggest the shorter, non-pedantic name.

Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yu-cheng Yu <yu-cheng.yu@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/include/asm/fpu/xstate.h | 4 ++--
arch/x86/kernel/fpu/regset.c | 4 ++--
arch/x86/kernel/fpu/signal.c | 2 +-
arch/x86/kernel/fpu/xstate.c | 4 ++--
4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h
index 1b2799e0699a..a1baa17e9748 100644
--- a/arch/x86/include/asm/fpu/xstate.h
+++ b/arch/x86/include/asm/fpu/xstate.h
@@ -48,8 +48,8 @@ void fpu__xstate_clear_all_cpu_caps(void);
void *get_xsave_addr(struct xregs_state *xsave, int xstate);
const void *get_xsave_field_ptr(int xstate_field);
int using_compacted_format(void);
-int copyout_from_xsaves(unsigned int pos, unsigned int count, void *kbuf,
+int copy_xstate_to_user(unsigned int pos, unsigned int count, void *kbuf,
void __user *ubuf, struct xregs_state *xsave);
-int copyin_to_xsaves(const void *kbuf, const void __user *ubuf,
+int copy_user_to_xstate(const void *kbuf, const void __user *ubuf,
struct xregs_state *xsave);
#endif
diff --git a/arch/x86/kernel/fpu/regset.c b/arch/x86/kernel/fpu/regset.c
index b188b16841e3..165d0545c924 100644
--- a/arch/x86/kernel/fpu/regset.c
+++ b/arch/x86/kernel/fpu/regset.c
@@ -92,7 +92,7 @@ int xstateregs_get(struct task_struct *target, const struct user_regset *regset,
fpu__activate_fpstate_read(fpu);

if (using_compacted_format()) {
- ret = copyout_from_xsaves(pos, count, kbuf, ubuf, xsave);
+ ret = copy_xstate_to_user(pos, count, kbuf, ubuf, xsave);
} else {
fpstate_sanitize_xstate(fpu);
/*
@@ -132,7 +132,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset,
fpu__activate_fpstate_write(fpu);

if (boot_cpu_has(X86_FEATURE_XSAVES))
- ret = copyin_to_xsaves(kbuf, ubuf, xsave);
+ ret = copy_user_to_xstate(kbuf, ubuf, xsave);
else
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, xsave, 0, -1);

diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c
index 83c23c230b4c..b1fe9a1fc4e0 100644
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -324,7 +324,7 @@ static int __fpu__restore_sig(void __user *buf, void __user *buf_fx, int size)
fpu__drop(fpu);

if (using_compacted_format()) {
- err = copyin_to_xsaves(NULL, buf_fx,
+ err = copy_user_to_xstate(NULL, buf_fx,
&fpu->state.xsave);
} else {
err = __copy_from_user(&fpu->state.xsave,
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index c24ac1efb12d..e7bb41723eaa 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -951,7 +951,7 @@ static inline int xstate_copyout(unsigned int pos, unsigned int count,
* zero. This is called from xstateregs_get() and there we check the CPU
* has XSAVES.
*/
-int copyout_from_xsaves(unsigned int pos, unsigned int count, void *kbuf,
+int copy_xstate_to_user(unsigned int pos, unsigned int count, void *kbuf,
void __user *ubuf, struct xregs_state *xsave)
{
unsigned int offset, size;
@@ -1023,7 +1023,7 @@ int copyout_from_xsaves(unsigned int pos, unsigned int count, void *kbuf,
* there we check the CPU has XSAVES and a whole standard-sized buffer
* exists.
*/
-int copyin_to_xsaves(const void *kbuf, const void __user *ubuf,
+int copy_user_to_xstate(const void *kbuf, const void __user *ubuf,
struct xregs_state *xsave)
{
unsigned int offset, size;
--
2.11.0
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