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powerpc: Remove NULL task struct pointer checks in FP and vector code

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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>
This commit is contained in:
Anton Blanchard
2015-10-29 11:44:00 +11:00
committed by Michael Ellerman
parent 611b0e5c19
commit b51b1153d0
4 changed files with 0 additions and 19 deletions
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14
arch/powerpc/kernel/vector.S
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@@ -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