[patch V2 26/52] x86/fpu: Rename xstate copy functions which are related to UABI

Thomas Gleixner
2021-06-14T16:39:18Z

Rename them to reflect that these functions deal with user space format
XSAVE buffers.

copy_xstate_to_kernel() -> copy_uabi_xstate_to_membuf()
copy_kernel_to_xstate() -> copy_uabi_from_kernel_to_xstate()
copy_user_to_xstate() -> copy_sigframe_from_user_to_xstate()

Again a clear statement that these functions deal with user space ABI.

Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/include/asm/fpu/xstate.h | 4 ++--
arch/x86/kernel/fpu/regset.c | 2 +-
arch/x86/kernel/fpu/signal.c | 2 +-
arch/x86/kernel/fpu/xstate.c | 5 +++--
4 files changed, 7 insertions(+), 6 deletions(-)

--- a/arch/x86/include/asm/fpu/xstate.h
+++ b/arch/x86/include/asm/fpu/xstate.h
@@ -102,8 +102,8 @@ extern void __init update_regset_xstate_

void *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr);
int xfeature_size(int xfeature_nr);
-int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf);
-int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf);
+int copy_uabi_from_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf);
+int copy_sigframe_from_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf);
void copy_dynamic_supervisor_to_kernel(struct xregs_state *xstate, u64 mask);
void copy_kernel_to_dynamic_supervisor(struct xregs_state *xstate, u64 mask);

--- a/arch/x86/kernel/fpu/regset.c
+++ b/arch/x86/kernel/fpu/regset.c
@@ -132,7 +132,7 @@ int xstateregs_set(struct task_struct *t
}

fpu__prepare_write(fpu);
- ret = copy_kernel_to_xstate(&fpu->state.xsave, kbuf ?: tmpbuf);
+ ret = copy_uabi_from_kernel_to_xstate(&fpu->state.xsave, kbuf ?: tmpbuf);

out:
vfree(tmpbuf);
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -431,7 +431,7 @@ static int __fpu__restore_sig(void __use
if (use_xsave() && !fx_only) {
u64 init_bv = xfeatures_mask_user() & ~user_xfeatures;

- ret = copy_user_to_xstate(&fpu->state.xsave, buf_fx);
+ ret = copy_sigframe_from_user_to_xstate(&fpu->state.xsave, buf_fx);
if (ret)
goto out;

--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -1080,7 +1080,7 @@ void copy_uabi_xstate_to_membuf(struct m
* Convert from a ptrace standard-format kernel buffer to kernel XSAVE[S] format
* and copy to the target thread. This is called from xstateregs_set().
*/
-int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf)
+int copy_uabi_from_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf)
{
unsigned int offset, size;
int i;
@@ -1140,7 +1140,8 @@ int copy_kernel_to_xstate(struct xregs_s
* XSAVE[S] format and copy to the target thread. This is called from the
* sigreturn() and rt_sigreturn() system calls.
*/
-int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf)
+int copy_sigframe_from_user_to_xstate(struct xregs_state *xsave,
+ const void __user *ubuf)
{
unsigned int offset, size;
int i;