[MIPS] signals: reduce {setup,restore}_sigcontext sizes

This trivial change reduces considerably code size of these
2 functions callers. For instance, here is the figures for
arch/kernel/signal.o objects:

   text    data     bss     dec     hex filename
  11972       0       0   11972    2ec4 arch/mips/kernel/signal.o~old
   5380       0       0    5380    1504 arch/mips/kernel/signal.o~new

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 21 insertions, 45 deletions

diff --git a/arch/mips/kernel/signal-common.h b/arch/mips/kernel/signal-common.h
index b1f09d54ebe6..bb3c631b808e 100644
--- a/arch/mips/kernel/signal-common.h
+++ b/arch/mips/kernel/signal-common.h
@@ -13,22 +13,13 @@ static inline int
 setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
 {
         int err = 0;
+        int i;
 
         err |= __put_user(regs->cp0_epc, &sc->sc_pc);
 
-#define save_gp_reg(i) do {                                             \
-        err |= __put_user(regs->regs[i], &sc->sc_regs[i]);              \
-} while(0)
-        __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
-        save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
-        save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
-        save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
-        save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
-        save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
-        save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
-        save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
-        save_gp_reg(31);
-#undef save_gp_reg
+        err |= __put_user(0, &sc->sc_regs[0]);
+        for (i = 1; i < 32; i++)
+                err |= __put_user(regs->regs[i], &sc->sc_regs[i]);
 
         err |= __put_user(regs->hi, &sc->sc_mdhi);
         err |= __put_user(regs->lo, &sc->sc_mdlo);
@@ -44,24 +35,21 @@ setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
 
         err |= __put_user(!!used_math(), &sc->sc_used_math);
 
-        if (!used_math())
-                goto out;
-
-        /*
-         * Save FPU state to signal context.  Signal handler will "inherit"
-         * current FPU state.
-         */
-        preempt_disable();
-
-        if (!is_fpu_owner()) {
-                own_fpu();
-                restore_fp(current);
+        if (used_math()) {
+                /*
+                 * Save FPU state to signal context.  Signal handler
+                 * will "inherit" current FPU state.
+                 */
+                preempt_disable();
+
+                if (!is_fpu_owner()) {
+                        own_fpu();
+                        restore_fp(current);
+                }
+                err |= save_fp_context(sc);
+
+                preempt_enable();
         }
-        err |= save_fp_context(sc);
-
-        preempt_enable();
-
-out:
         return err;
 }
 
@@ -71,6 +59,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
         unsigned int used_math;
         unsigned long treg;
         int err = 0;
+        int i;
 
         /* Always make any pending restarted system calls return -EINTR */
         current_thread_info()->restart_block.fn = do_no_restart_syscall;
@@ -88,21 +77,8 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
                 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
         }
 
-#define restore_gp_reg(i) do {                                          \
-        err |= __get_user(regs->regs[i], &sc->sc_regs[i]);              \
-} while(0)
-        restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
-        restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
-        restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
-        restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
-        restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
-        restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
-        restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
-        restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
-        restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
-        restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
-        restore_gp_reg(31);
-#undef restore_gp_reg
+        for (i = 1; i < 32; i++)
+                err |= __get_user(regs->regs[i], &sc->sc_regs[i]);
 
         err |= __get_user(used_math, &sc->sc_used_math);
         conditional_used_math(used_math);