x86/fpu/math-emu: Remove define layer for undocumented opcodes

No code changes.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1442588010-20055-1-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/math-emu/fpu_entry.c b/arch/x86/math-emu/fpu_entry.c
index 929b1d5..65afd46 100644 (file)
--- a/arch/x86/math-emu/fpu_entry.c
+++ b/arch/x86/math-emu/fpu_entry.c
@@ -40,30 +40,29 @@
 
 #define __BAD__ FPU_illegal    /* Illegal on an 80486, causes SIGILL */
 
-/* WARNING: These codes are not documented by Intel in their 80486 manual
-   and may not work on FPU clones or later Intel FPUs. */
-
-/* Changes to support the un-doc codes provided by Linus Torvalds. */
-
-#define _d9_d8_ fstp_i         /* unofficial code (19) */
-#define _dc_d0_ fcom_st                /* unofficial code (14) */
-#define _dc_d8_ fcompst                /* unofficial code (1c) */
-#define _dd_c8_ fxch_i         /* unofficial code (0d) */
-#define _de_d0_ fcompst                /* unofficial code (16) */
-#define _df_c0_ ffreep         /* unofficial code (07) ffree + pop */
-#define _df_c8_ fxch_i         /* unofficial code (0f) */
-#define _df_d0_ fstp_i         /* unofficial code (17) */
-#define _df_d8_ fstp_i         /* unofficial code (1f) */
+/* WARNING: "u" entries are not documented by Intel in their 80486 manual
+   and may not work on FPU clones or later Intel FPUs.
+   Changes to support them provided by Linus Torvalds. */
 
 static FUNC const st_instr_table[64] = {
-       fadd__, fld_i_, __BAD__, __BAD__, fadd_i, ffree_, faddp_, _df_c0_,
-       fmul__, fxch_i, __BAD__, __BAD__, fmul_i, _dd_c8_, fmulp_, _df_c8_,
-       fcom_st, fp_nop, __BAD__, __BAD__, _dc_d0_, fst_i_, _de_d0_, _df_d0_,
-       fcompst, _d9_d8_, __BAD__, __BAD__, _dc_d8_, fstp_i, fcompp, _df_d8_,
-       fsub__, FPU_etc, __BAD__, finit_, fsubri, fucom_, fsubrp, fstsw_,
-       fsubr_, fconst, fucompp, __BAD__, fsub_i, fucomp, fsubp_, __BAD__,
-       fdiv__, FPU_triga, __BAD__, __BAD__, fdivri, __BAD__, fdivrp, __BAD__,
-       fdivr_, FPU_trigb, __BAD__, __BAD__, fdiv_i, __BAD__, fdivp_, __BAD__,
+/* Opcode:     d8              d9              da              db */
+/*             dc              dd              de              df */
+/* c0..7 */    fadd__,         fld_i_,         __BAD__,        __BAD__,
+/* c0..7 */    fadd_i,         ffree_,         faddp_,         ffreep,/*u*/
+/* c8..f */    fmul__,         fxch_i,         __BAD__,        __BAD__,
+/* c8..f */    fmul_i,         fxch_i,/*u*/    fmulp_,         fxch_i,/*u*/
+/* d0..7 */    fcom_st,        fp_nop,         __BAD__,        __BAD__,
+/* d0..7 */    fcom_st,/*u*/   fst_i_,         fcompst,/*u*/   fstp_i,/*u*/
+/* d8..f */    fcompst,        fstp_i,/*u*/    __BAD__,        __BAD__,
+/* d8..f */    fcompst,/*u*/   fstp_i,         fcompp,         fstp_i,/*u*/
+/* e0..7 */    fsub__,         FPU_etc,        __BAD__,        finit_,
+/* e0..7 */    fsubri,         fucom_,         fsubrp,         fstsw_,
+/* e8..f */    fsubr_,         fconst,         fucompp,        __BAD__,
+/* e8..f */    fsub_i,         fucomp,         fsubp_,         __BAD__,
+/* f0..7 */    fdiv__,         FPU_triga,      __BAD__,        __BAD__,
+/* f0..7 */    fdivri,         __BAD__,        fdivrp,         __BAD__,
+/* f8..f */    fdivr_,         FPU_trigb,      __BAD__,        __BAD__,
+/* f8..f */    fdiv_i,         __BAD__,        fdivp_,         __BAD__,
 };
 
 #define _NONE_ 0               /* Take no special action */