[OpenWrt-Devel] [PATCH] kernel: re-enable MIPS VDSO

[Rosen Penev]

On Fri, Sep 21, 2018 at 11:42 AM Kevin Darbyshire-Bryant
<ldir at darbyshire-bryant.me.uk> wrote:
>
> kernel upstream commit 9efcaa7c4afba5628f2650a76f69c798f47eeb18 to 4.14
> itself a backport of 0f02cfbc3d9e413d450d8d0fd660077c23f67eff has
> resolved the cache line issues that led to us disabling VDSO by default
> on MIPS.
Do you know if this is related to the mmap failure on ar71xx?

https://lists.openwrt.org/pipermail/openwrt-devel/2018-May/012135.html
>
> Remove our force disable patch:
>
> pending-4.14/206-mips-disable-vdso.patch
>
> Signed-off-by: Kevin Darbyshire-Bryant <ldir at darbyshire-bryant.me.uk>
> ---
>  .../pending-4.14/206-mips-disable-vdso.patch  | 23 -------------------
>  1 file changed, 23 deletions(-)
>  delete mode 100644 target/linux/generic/pending-4.14/206-mips-disable-vdso.patch
>
> diff --git a/target/linux/generic/pending-4.14/206-mips-disable-vdso.patch b/target/linux/generic/pending-4.14/206-mips-disable-vdso.patch
> deleted file mode 100644
> index f3c58dcd3a..0000000000
> --- a/target/linux/generic/pending-4.14/206-mips-disable-vdso.patch
> +++ /dev/null
> @@ -1,23 +0,0 @@
> -From: Felix Fietkau <nbd at nbd.name>
> -Subject: kernel: disable MIPS VDSO by default until the cache issues have been resolved
> -
> -lede-commit: 1185e645a773c86aa88cf04d0e2911dc62eb43f5
> -Signed-off-by: Felix Fietkau <nbd at nbd.name>
> ----
> - arch/mips/vdso/Makefile | 4 ++--
> - 1 file changed, 2 insertions(+), 2 deletions(-)
> -
> ---- a/arch/mips/vdso/Makefile
> -+++ b/arch/mips/vdso/Makefile
> -@@ -30,9 +30,9 @@ aflags-vdso := $(ccflags-vdso) \
> - ifndef CONFIG_CPU_MIPSR6
> -   ifeq ($(call ld-ifversion, -lt, 225000000, y),y)
> -     $(warning MIPS VDSO requires binutils >= 2.25)
> --    obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
> --    ccflags-vdso += -DDISABLE_MIPS_VDSO
> -   endif
> -+  obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
> -+  ccflags-vdso += -DDISABLE_MIPS_VDSO
> - endif
> -
> - # VDSO linker flags.
> --
> 2.17.1 (Apple Git-112)
>
>
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