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x86-32, fpu: Remove math_emulate stub

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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>
This commit is contained in:
Brian Gerst 2010-09-03 21:17:15 -04:00 committed by H. Peter Anvin
parent 820241356d
commit a334fe43d8
1 changed files with 6 additions and 17 deletions
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23
arch/x86/kernel/traps.c
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@ -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
}