diff options
| author | Borislav Petkov <bp@suse.de> | 2016-04-05 08:29:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-13 11:37:43 +0200 |
| commit | de82fbc3823b7b15ee03466ebfb1c5ec7cc1a941 (patch) | |
| tree | d327eaa9cfb676954b53e0f8aed20e35eccb6c97 /arch/x86/kernel/fpu | |
| parent | x86/tsc: Save an indentation level in recalibrate_cpu_khz() (diff) | |
| download | linux-de82fbc3823b7b15ee03466ebfb1c5ec7cc1a941.tar.xz linux-de82fbc3823b7b15ee03466ebfb1c5ec7cc1a941.zip | |
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>
Diffstat (limited to 'arch/x86/kernel/fpu')
| -rw-r--r-- | arch/x86/kernel/fpu/bugs.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/arch/x86/kernel/fpu/bugs.c b/arch/x86/kernel/fpu/bugs.c index 224b5ec52195..aad34aafc0e0 100644 --- a/arch/x86/kernel/fpu/bugs.c +++ b/arch/x86/kernel/fpu/bugs.c @@ -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(); -} |