diff options
| author | Anton Blanchard <anton@samba.org> | 2015-10-29 01:44:00 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-12-01 03:52:25 +0100 |
| commit | b51b1153d0e78a70767441273331d2de066bb929 (patch) | |
| tree | 1b41562f57798ca87aa5f363c66cb3c8530e6ebf | |
| parent | powerpc: Create mtmsrd_isync() (diff) | |
| download | linux-b51b1153d0e78a70767441273331d2de066bb929.tar.xz linux-b51b1153d0e78a70767441273331d2de066bb929.zip | |
powerpc: Remove NULL task struct pointer checks in FP and vector code
We used to allow giveup_*() to be called with a NULL task struct
pointer. Now those cases are handled in the caller we can remove
the checks. We can also remove giveup_altivec_notask() which is also
unused.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/include/asm/switch_to.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/fpu.S | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/head_fsl_booke.S | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/vector.S | 14 |
4 files changed, 0 insertions, 19 deletions
diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h index bd1d93318350..042aaf05a787 100644 --- a/arch/powerpc/include/asm/switch_to.h +++ b/arch/powerpc/include/asm/switch_to.h @@ -38,7 +38,6 @@ static inline void giveup_fpu(struct task_struct *t) { } #ifdef CONFIG_ALTIVEC extern void flush_altivec_to_thread(struct task_struct *); extern void giveup_altivec(struct task_struct *); -extern void giveup_altivec_notask(void); #else static inline void flush_altivec_to_thread(struct task_struct *t) { diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S index 50d2352f2cf4..71bdce284ad9 100644 --- a/arch/powerpc/kernel/fpu.S +++ b/arch/powerpc/kernel/fpu.S @@ -173,8 +173,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX) MTMSRD(r5) /* enable use of fpu now */ SYNC_601 isync - PPC_LCMPI 0,r3,0 - beqlr- /* if no previous owner, done */ addi r3,r3,THREAD /* want THREAD of task */ PPC_LL r6,THREAD_FPSAVEAREA(r3) PPC_LL r5,PT_REGS(r3) diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index ec936abbcadc..d6980bbae954 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -992,8 +992,6 @@ _GLOBAL(giveup_spe) oris r5,r5,MSR_SPE@h mtmsr r5 /* enable use of SPE now */ isync - cmpi 0,r3,0 - beqlr- /* if no previous owner, done */ addi r3,r3,THREAD /* want THREAD of task */ lwz r5,PT_REGS(r3) cmpi 0,r5,0 diff --git a/arch/powerpc/kernel/vector.S b/arch/powerpc/kernel/vector.S index 1757c0c936c1..b31528c30253 100644 --- a/arch/powerpc/kernel/vector.S +++ b/arch/powerpc/kernel/vector.S @@ -111,16 +111,6 @@ _GLOBAL(load_up_altivec) /* restore registers and return */ blr -_GLOBAL(giveup_altivec_notask) - mfmsr r3 - andis. r4,r3,MSR_VEC@h - bnelr /* Already enabled? */ - oris r3,r3,MSR_VEC@h - SYNC - MTMSRD(r3) /* enable use of VMX now */ - isync - blr - /* * giveup_altivec(tsk) * Disable VMX for the task given as the argument, @@ -133,8 +123,6 @@ _GLOBAL(giveup_altivec) SYNC MTMSRD(r5) /* enable use of VMX now */ isync - PPC_LCMPI 0,r3,0 - beqlr /* if no previous owner, done */ addi r3,r3,THREAD /* want THREAD of task */ PPC_LL r7,THREAD_VRSAVEAREA(r3) PPC_LL r5,PT_REGS(r3) @@ -203,8 +191,6 @@ _GLOBAL(__giveup_vsx) mtmsrd r5 /* enable use of VSX now */ isync - cmpdi 0,r3,0 - beqlr- /* if no previous owner, done */ addi r3,r3,THREAD /* want THREAD of task */ ld r5,PT_REGS(r3) cmpdi 0,r5,0 |