Christophe Leroy <christophe.le...@csgroup.eu> writes:
> There is no big poing in not pinning kernel text anymore, as now
> we can keep pinned TLB even with things like DEBUG_PAGEALLOC.
>
> Remove CONFIG_PIN_TLB_TEXT, making it always right.
>
> Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
> ---
> arch/powerpc/Kconfig | 3 +--
> arch/powerpc/kernel/head_8xx.S | 20 +++-----------------
> arch/powerpc/mm/nohash/8xx.c | 3 +--
> arch/powerpc/platforms/8xx/Kconfig | 7 -------
> 4 files changed, 5 insertions(+), 28 deletions(-)
>
...
> diff --git a/arch/powerpc/mm/nohash/8xx.c b/arch/powerpc/mm/nohash/8xx.c
> index 231ca95f9ffb..19a3eec1d8c5 100644
> --- a/arch/powerpc/mm/nohash/8xx.c
> +++ b/arch/powerpc/mm/nohash/8xx.c
> @@ -186,8 +186,7 @@ void mmu_mark_initmem_nx(void)
> mmu_mapin_ram_chunk(0, boundary, PAGE_KERNEL_TEXT, false);
> mmu_mapin_ram_chunk(boundary, einittext8, PAGE_KERNEL, false);
>
> - if (IS_ENABLED(CONFIG_PIN_TLB_TEXT))
> - mmu_pin_tlb(block_mapped_ram, false);
> + mmu_pin_tlb(block_mapped_ram, false);
> }
This broke mpc885_ads_defconfig with:
ld: arch/powerpc/mm/nohash/8xx.o: in function `mmu_mark_initmem_nx':
/home/michael/linux/arch/powerpc/mm/nohash/8xx.c:189: undefined reference to
`mmu_pin_tlb'
make[1]: *** [/home/michael/linux/Makefile:1164: vmlinux] Error 1
make: *** [Makefile:185: __sub-make] Error 2
Fixed by:
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 35707e86c5f3..52702f3db6df 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -702,7 +702,6 @@ FixupDAR:/* Entry point for dcbx workaround. */
mtspr SPRN_DER, r8
blr
-#ifdef CONFIG_PIN_TLB
_GLOBAL(mmu_pin_tlb)
lis r9, (1f - PAGE_OFFSET)@h
ori r9, r9, (1f - PAGE_OFFSET)@l
@@ -802,7 +801,6 @@ _GLOBAL(mmu_pin_tlb)
mtspr SPRN_SRR1, r10
mtspr SPRN_SRR0, r11
rfi
-#endif /* CONFIG_PIN_TLB */
/*
* We put a few things here that have to be page-aligned.
cheers
