From a007b1f1c764c08896bc574fbd33e19ce898a188 Mon Sep 17 00:00:00 2001 From: Franck Bui-Huu Date: Mon, 5 Feb 2007 15:24:19 +0100 Subject: [PATCH] [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 Signed-off-by: Ralf Baechle --- arch/mips/kernel/signal-common.h | 66 +++++++++++++--------------------------- 1 file changed, 21 insertions(+), 45 deletions(-) diff --git a/arch/mips/kernel/signal-common.h b/arch/mips/kernel/signal-common.h index b1f09d5..bb3c631 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); -- 2.7.4