diff options
Diffstat (limited to 'arch/x86/kernel/fpu/bugs.c')
| -rw-r--r-- | arch/x86/kernel/fpu/bugs.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/fpu/bugs.c b/arch/x86/kernel/fpu/bugs.c index 400a3d713fb2..449b5f3f4925 100644 --- a/arch/x86/kernel/fpu/bugs.c +++ b/arch/x86/kernel/fpu/bugs.c @@ -23,8 +23,13 @@ static double __initdata y = 3145727.0; */ static void __init check_fpu(void) { + u32 cr0_saved; s32 fdiv_bug; + /* We might have CR0::TS set already, clear it: */ + cr0_saved = read_cr0(); + write_cr0(cr0_saved & ~X86_CR0_TS); + kernel_fpu_begin(); /* @@ -47,6 +52,8 @@ static void __init check_fpu(void) kernel_fpu_end(); + write_cr0(cr0_saved); + if (fdiv_bug) { set_cpu_bug(&boot_cpu_data, X86_BUG_FDIV); pr_warn("Hmm, FPU with FDIV bug\n"); |