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powerpc: simplify BDI switch

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There is no reason to re-read each time the pointer at
location 0xf0 as it is fixed and known.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2019-02-21 10:37:53 +00:00
committed by Michael Ellerman
parent 36da5ff0be
commit 40058337f2
5 changed files with 9 additions and 11 deletions
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5
arch/powerpc/kernel/head_40x.S
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@@ -953,9 +953,8 @@ _GLOBAL(set_context)
/* Context switch the PTE pointer for the Abatron BDI2000.
* The PGDIR is the second parameter.
*/
lis r5, KERNELBASE@h
lwz r5, 0xf0(r5)
stw r4, 0x4(r5)
lis r5, abatron_pteptrs@ha
stw r4, abatron_pteptrs@l + 0x4(r5)
#endif
sync
mtspr SPRN_PID,r3