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x86/fpu: Remove check_fpu() indirection 

Rename it to fpu__init_check_bugs() and do the CPU feature check at
entry, thus getting rid of the old fpu__init_check_bugs() wrapper.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1459837795-2588-6-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Borislav Petkov 2016-04-05 08:29:54 +02:00 committed by Ingo Molnar
parent eff4677e9f
commit de82fbc382
1 changed files with 5 additions and 11 deletions
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16
arch/x86/kernel/fpu/bugs.c
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@ -21,11 +21,15 @@ static double __initdata y = 3145727.0;
* We should really only care about bugs here
* anyway. Not features.
*/
static void __init check_fpu(void)
void __init fpu__init_check_bugs(void)
{
u32 cr0_saved;
s32 fdiv_bug;
/* kernel_fpu_begin/end() relies on patched alternative instructions. */
if (!boot_cpu_has(X86_FEATURE_FPU))
return;
/* We might have CR0::TS set already, clear it: */
cr0_saved = read_cr0();
write_cr0(cr0_saved & ~X86_CR0_TS);
@ -59,13 +63,3 @@ static void __init check_fpu(void)
pr_warn("Hmm, FPU with FDIV bug\n");
}
}
void __init fpu__init_check_bugs(void)
{
/*
* kernel_fpu_begin/end() in check_fpu() relies on the patched
* alternative instructions.
*/
if (boot_cpu_has(X86_FEATURE_FPU))
check_fpu();
}