diff options
| author | Brian Gerst <brgerst@gmail.com> | 2010-09-04 03:17:15 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-09-09 23:17:11 +0200 |
| commit | a334fe43d85f570ae907acf988a053c5eff78d6e (patch) | |
| tree | 1b340dd16173ce9e74aa369d83daea27bac961d3 /arch/x86/kernel | |
| parent | x86-64, fpu: Simplify constraints for fxsave/fxtstor (diff) | |
| download | linux-a334fe43d85f570ae907acf988a053c5eff78d6e.tar.xz linux-a334fe43d85f570ae907acf988a053c5eff78d6e.zip | |
x86-32, fpu: Remove math_emulate stub
check_fpu() in bugs.c halts boot if no FPU is found and math emulation
isn't enabled. Therefore this stub will never be used.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <1283563039-3466-9-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/traps.c | 23 |
1 files changed, 6 insertions, 17 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index d0029eb58589..d43968503dd2 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -776,21 +776,10 @@ asmlinkage void math_state_restore(void) } EXPORT_SYMBOL_GPL(math_state_restore); -#ifndef CONFIG_MATH_EMULATION -void math_emulate(struct math_emu_info *info) -{ - printk(KERN_EMERG - "math-emulation not enabled and no coprocessor found.\n"); - printk(KERN_EMERG "killing %s.\n", current->comm); - force_sig(SIGFPE, current); - schedule(); -} -#endif /* CONFIG_MATH_EMULATION */ - dotraplinkage void __kprobes do_device_not_available(struct pt_regs *regs, long error_code) { -#ifdef CONFIG_X86_32 +#ifdef CONFIG_MATH_EMULATION if (read_cr0() & X86_CR0_EM) { struct math_emu_info info = { }; @@ -798,12 +787,12 @@ do_device_not_available(struct pt_regs *regs, long error_code) info.regs = regs; math_emulate(&info); - } else { - math_state_restore(); /* interrupts still off */ - conditional_sti(regs); + return; } -#else - math_state_restore(); +#endif + math_state_restore(); /* interrupts still off */ +#ifdef CONFIG_X86_32 + conditional_sti(regs); #endif } |