diff options
Diffstat (limited to 'include/asm-mips/fpu.h')
-rw-r--r-- | include/asm-mips/fpu.h | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/include/asm-mips/fpu.h b/include/asm-mips/fpu.h index 4e12d1f9534f..b414a7d9db43 100644 --- a/include/asm-mips/fpu.h +++ b/include/asm-mips/fpu.h | |||
@@ -68,8 +68,6 @@ do { \ | |||
68 | /* We don't care about the c0 hazard here */ \ | 68 | /* We don't care about the c0 hazard here */ \ |
69 | } while (0) | 69 | } while (0) |
70 | 70 | ||
71 | #define __fpu_enabled() (read_c0_status() & ST0_CU1) | ||
72 | |||
73 | #define enable_fpu() \ | 71 | #define enable_fpu() \ |
74 | do { \ | 72 | do { \ |
75 | if (cpu_has_fpu) \ | 73 | if (cpu_has_fpu) \ |
@@ -102,14 +100,19 @@ static inline void __own_fpu(void) | |||
102 | set_thread_flag(TIF_USEDFPU); | 100 | set_thread_flag(TIF_USEDFPU); |
103 | } | 101 | } |
104 | 102 | ||
105 | static inline void own_fpu(int restore) | 103 | static inline void own_fpu_inatomic(int restore) |
106 | { | 104 | { |
107 | preempt_disable(); | ||
108 | if (cpu_has_fpu && !__is_fpu_owner()) { | 105 | if (cpu_has_fpu && !__is_fpu_owner()) { |
109 | __own_fpu(); | 106 | __own_fpu(); |
110 | if (restore) | 107 | if (restore) |
111 | _restore_fp(current); | 108 | _restore_fp(current); |
112 | } | 109 | } |
110 | } | ||
111 | |||
112 | static inline void own_fpu(int restore) | ||
113 | { | ||
114 | preempt_disable(); | ||
115 | own_fpu_inatomic(restore); | ||
113 | preempt_enable(); | 116 | preempt_enable(); |
114 | } | 117 | } |
115 | 118 | ||
@@ -162,18 +165,4 @@ static inline fpureg_t *get_fpu_regs(struct task_struct *tsk) | |||
162 | return tsk->thread.fpu.fpr; | 165 | return tsk->thread.fpu.fpr; |
163 | } | 166 | } |
164 | 167 | ||
165 | static inline void enable_fp_in_kernel(void) | ||
166 | { | ||
167 | set_thread_flag(TIF_ALLOW_FP_IN_KERNEL); | ||
168 | /* make sure CU1 and FPU ownership are consistent */ | ||
169 | if (!__is_fpu_owner() && __fpu_enabled()) | ||
170 | __disable_fpu(); | ||
171 | } | ||
172 | |||
173 | static inline void disable_fp_in_kernel(void) | ||
174 | { | ||
175 | BUG_ON(!__is_fpu_owner() && __fpu_enabled()); | ||
176 | clear_thread_flag(TIF_ALLOW_FP_IN_KERNEL); | ||
177 | } | ||
178 | |||
179 | #endif /* _ASM_FPU_H */ | 168 | #endif /* _ASM_FPU_H */ |