x86/fpu: Remove internal.h dependency from fpu/signal.h

In order to remove internal.h make signal.h independent of it.

Include asm/fpu/xstate.h to fix a missing update_regset_xstate_info()
prototype, which is
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211015011539.844565975@linutronix.de

arch/x86/ia32/ia32_signal.c

@@ -24,7 +24,6 @@
 #include <linux/syscalls.h>
 #include <asm/ucontext.h>
 #include <linux/uaccess.h>
-#include <asm/fpu/internal.h>
 #include <asm/fpu/signal.h>
 #include <asm/ptrace.h>
 #include <asm/ia32_unistd.h>

arch/x86/include/asm/fpu/api.h

@@ -116,6 +116,9 @@ extern void fpstate_init_soft(struct swregs_state *soft);
 static inline void fpstate_init_soft(struct swregs_state *soft) {}
 #endif
 
+/* State tracking */
+DECLARE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx);
+
 /* fpstate */
 extern union fpregs_state init_fpstate;
 

arch/x86/include/asm/fpu/internal.h

@@ -26,7 +26,6 @@
 /*
  * High level FPU state handling functions:
  */
-extern bool fpu__restore_sig(void __user *buf, int ia32_frame);
 extern void fpu__clear_user_states(struct fpu *fpu);
 extern int  fpu__exception_code(struct fpu *fpu, int trap_nr);
 
@@ -42,10 +41,4 @@ extern void fpu__init_system(struct cpuinfo_x86 *c);
 extern void fpu__init_check_bugs(void);
 extern void fpu__resume_cpu(void);
 
-extern void restore_fpregs_from_fpstate(union fpregs_state *fpstate, u64 mask);
-
-extern bool copy_fpstate_to_sigframe(void __user *buf, void __user *fp, int size);
-
-DECLARE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx);
-
 #endif /* _ASM_X86_FPU_INTERNAL_H */

arch/x86/include/asm/fpu/signal.h

@@ -5,6 +5,11 @@
 #ifndef _ASM_X86_FPU_SIGNAL_H
 #define _ASM_X86_FPU_SIGNAL_H
 
+#include <linux/compat.h>
+#include <linux/user.h>
+
+#include <asm/fpu/types.h>
+
 #ifdef CONFIG_X86_64
 # include <uapi/asm/sigcontext.h>
 # include <asm/user32.h>
@@ -31,4 +36,12 @@ fpu__alloc_mathframe(unsigned long sp, int ia32_frame,
 
 unsigned long fpu__get_fpstate_size(void);
 
+extern bool copy_fpstate_to_sigframe(void __user *buf, void __user *fp, int size);
+extern void fpu__clear_user_states(struct fpu *fpu);
+extern bool fpu__restore_sig(void __user *buf, int ia32_frame);
+
+extern void restore_fpregs_from_fpstate(union fpregs_state *fpstate, u64 mask);
+
+extern bool copy_fpstate_to_sigframe(void __user *buf, void __user *fp, int size);
+
 #endif /* _ASM_X86_FPU_SIGNAL_H */

arch/x86/kernel/fpu/signal.c

@@ -7,7 +7,6 @@
 #include <linux/cpu.h>
 #include <linux/pagemap.h>
 
-#include <asm/fpu/internal.h>
 #include <asm/fpu/signal.h>
 #include <asm/fpu/regset.h>
 #include <asm/fpu/xstate.h>

arch/x86/kernel/ptrace.c

@@ -29,9 +29,9 @@
 
 #include <linux/uaccess.h>
 #include <asm/processor.h>
-#include <asm/fpu/internal.h>
 #include <asm/fpu/signal.h>
 #include <asm/fpu/regset.h>
+#include <asm/fpu/xstate.h>
 #include <asm/debugreg.h>
 #include <asm/ldt.h>
 #include <asm/desc.h>

arch/x86/kernel/signal.c

@@ -30,7 +30,6 @@
 
 #include <asm/processor.h>
 #include <asm/ucontext.h>
-#include <asm/fpu/internal.h>
 #include <asm/fpu/signal.h>
 #include <asm/vdso.h>
 #include <asm/mce.h>

arch/x86/mm/extable.c

@@ -4,7 +4,8 @@
 #include <linux/sched/debug.h>
 #include <xen/xen.h>
 
-#include <asm/fpu/internal.h>
+#include <asm/fpu/signal.h>
+#include <asm/fpu/xstate.h>
 #include <asm/sev.h>
 #include <asm/traps.h>
 #include <asm/kdebug.h>