diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2009-11-24 19:35:41 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-12-17 01:57:32 +0000 |
| commit | 137f6f3e284e8215a940cf20dbf2aef449fe5a60 (patch) | |
| tree | a8243dc24c2e00eb2d6b0c924b2dde3910912eb0 /arch/mips/kernel/signal.c | |
| parent | 69f3a7de1f1ec935924b1b13f83812f8b30e92ce (diff) | |
MIPS: Cleanup signal code initialization
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/709/
Diffstat (limited to 'arch/mips/kernel/signal.c')
| -rw-r--r-- | arch/mips/kernel/signal.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c index 6254041b942..d0c68b5d717 100644 --- a/arch/mips/kernel/signal.c +++ b/arch/mips/kernel/signal.c @@ -35,6 +35,15 @@ #include "signal-common.h" +static int (*save_fp_context)(struct sigcontext __user *sc); +static int (*restore_fp_context)(struct sigcontext __user *sc); + +extern asmlinkage int _save_fp_context(struct sigcontext __user *sc); +extern asmlinkage int _restore_fp_context(struct sigcontext __user *sc); + +extern asmlinkage int fpu_emulator_save_context(struct sigcontext __user *sc); +extern asmlinkage int fpu_emulator_restore_context(struct sigcontext __user *sc); + /* * Horribly complicated - with the bloody RM9000 workarounds enabled * the signal trampolines is moving to the end of the structure so we can @@ -709,3 +718,40 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, void *unused, key_replace_session_keyring(); } } + +#ifdef CONFIG_SMP +static int smp_save_fp_context(struct sigcontext __user *sc) +{ + return raw_cpu_has_fpu + ? _save_fp_context(sc) + : fpu_emulator_save_context(sc); +} + +static int smp_restore_fp_context(struct sigcontext __user *sc) +{ + return raw_cpu_has_fpu + ? _restore_fp_context(sc) + : fpu_emulator_restore_context(sc); +} +#endif + +static int signal_setup(void) +{ +#ifdef CONFIG_SMP + /* For now just do the cpu_has_fpu check when the functions are invoked */ + save_fp_context = smp_save_fp_context; + restore_fp_context = smp_restore_fp_context; +#else + if (cpu_has_fpu) { + save_fp_context = _save_fp_context; + restore_fp_context = _restore_fp_context; + } else { + save_fp_context = fpu_emulator_save_context; + restore_fp_context = fpu_emulator_restore_context; + } +#endif + + return 0; +} + +arch_initcall(signal_setup); |