x86: x86 i387 user_regset

This revamps the i387 code to be shared across 32-bit, 64-bit,
and 32-on-64.  It does so by consolidating the code in one place
based on the user_regset accessor interfaces.  This switches
32-bit to using the i387_64.h header and 64-bit to using the
i387.c that was previously i387_32.c, but that's what took the
least cleanup in each file.  Here i387.h is stubbed to always
include i387_64.h rather than renaming the file, to keep this
diff smaller and easier to read.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/asm-x86/i387_64.h b/include/asm-x86/i387_64.h
index 4cea7373ac78..de435b9114df 100644
--- a/include/asm-x86/i387_64.h
+++ b/include/asm-x86/i387_64.h
@@ -12,6 +12,7 @@
 
 #include <linux/sched.h>
 #include <linux/kernel_stat.h>
+#include <linux/regset.h>
 #include <asm/processor.h>
 #include <asm/sigcontext.h>
 #include <asm/user.h>
@@ -23,6 +24,16 @@ extern void mxcsr_feature_mask_init(void);
 extern void init_fpu(struct task_struct *child);
 extern asmlinkage void math_state_restore(void);
 
+extern user_regset_active_fn fpregs_active, xfpregs_active;
+extern user_regset_get_fn fpregs_get, xfpregs_get, fpregs_soft_get;
+extern user_regset_set_fn fpregs_set, xfpregs_set, fpregs_soft_set;
+
+#ifdef CONFIG_IA32_EMULATION
+struct _fpstate_ia32;
+extern int save_i387_ia32(struct _fpstate_ia32 __user *buf);
+extern int restore_i387_ia32(struct _fpstate_ia32 __user *buf);
+#endif
+
 #ifdef CONFIG_X86_64
 
 /* Ignore delayed exceptions from user space */