diff options
| author | Anton Blanchard <anton@samba.org> | 2015-10-29 11:43:57 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-12-01 13:52:24 +1100 |
| commit | af1bbc3dd3d501d27da72e1764afe5f5b0d3882d (patch) | |
| tree | 99e12a987162dce90c51b7f7ccb2b3e23b154c4b /arch/powerpc/include | |
| parent | 68bfa962bff5783ad65de9dc7f3b9e16ea466766 (diff) | |
powerpc: Remove UP only lazy floating point and vector optimisations
The UP only lazy floating point and vector optimisations were written
back when SMP was not common, and neither glibc nor gcc used vector
instructions. Now SMP is very common, glibc aggressively uses vector
instructions and gcc autovectorises.
We want to add new optimisations that apply to both UP and SMP, but
in preparation for that remove these UP only optimisations.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/processor.h | 6 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/switch_to.h | 8 |
2 files changed, 0 insertions, 14 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index c273f3e0ba84..a2e891840806 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -88,12 +88,6 @@ struct task_struct; void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp); void release_thread(struct task_struct *); -/* Lazy FPU handling on uni-processor */ -extern struct task_struct *last_task_used_math; -extern struct task_struct *last_task_used_altivec; -extern struct task_struct *last_task_used_vsx; -extern struct task_struct *last_task_used_spe; - #ifdef CONFIG_PPC32 #if CONFIG_TASK_SIZE > CONFIG_KERNEL_START diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h index 33a071d24ba8..bd1d93318350 100644 --- a/arch/powerpc/include/asm/switch_to.h +++ b/arch/powerpc/include/asm/switch_to.h @@ -27,14 +27,6 @@ extern void giveup_spe(struct task_struct *); extern void load_up_spe(struct task_struct *); extern void switch_booke_debug_regs(struct debug_reg *new_debug); -#ifndef CONFIG_SMP -extern void discard_lazy_cpu_state(void); -#else -static inline void discard_lazy_cpu_state(void) -{ -} -#endif - #ifdef CONFIG_PPC_FPU extern void flush_fp_to_thread(struct task_struct *); extern void giveup_fpu(struct task_struct *); |