diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c index 01117e977a7fbba083fd02196f763f0e58028487..56aea5f526a7dbcef839b0ca352d58b745196923 100644 --- a/arch/mips/kernel/branch.c +++ b/arch/mips/kernel/branch.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -161,10 +162,13 @@ int __compute_return_epc(struct pt_regs *regs) * And now the FPA/cp1 branch instructions. */ case cop1_op: - if (!cpu_has_fpu) - fcr31 = current->thread.fpu.soft.fcr31; - else + preempt_disable(); + if (is_fpu_owner()) asm volatile("cfc1\t%0,$31" : "=r" (fcr31)); + else + fcr31 = current->thread.fpu.hard.fcr31; + preempt_enable(); + bit = (insn.i_format.rt >> 2); bit += (bit != 0); bit += 23; diff --git a/include/asm-mips/fpu.h b/include/asm-mips/fpu.h index ea24e733b1bcf84a74e952258c5527dc9ad8b714..9c828b1f821875e273bdd3da8f9a6b3fcf98e27b 100644 --- a/include/asm-mips/fpu.h +++ b/include/asm-mips/fpu.h @@ -80,9 +80,14 @@ do { \ #define clear_fpu_owner() clear_thread_flag(TIF_USEDFPU) +static inline int __is_fpu_owner(void) +{ + return test_thread_flag(TIF_USEDFPU); +} + static inline int is_fpu_owner(void) { - return cpu_has_fpu && test_thread_flag(TIF_USEDFPU); + return cpu_has_fpu && __is_fpu_owner(); } static inline void own_fpu(void) @@ -127,7 +132,7 @@ static inline void restore_fp(struct task_struct *tsk) static inline fpureg_t *get_fpu_regs(struct task_struct *tsk) { if (cpu_has_fpu) { - if ((tsk == current) && is_fpu_owner()) + if ((tsk == current) && __is_fpu_owner()) _save_fp(current); return tsk->thread.fpu.hard.fpr; }