From 9c7d5fb5706bf6ecdc67b0265c3a3ef61286ec82 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Mon, 18 Jan 2016 23:20:18 +0000 Subject: [PATCH] kernel: work around CONFIG_CPU_SW_DOMAIN_PAN breakage on ARM11 MPCore Signed-off-by: Felix Fietkau SVN-Revision: 48335 --- ...CONFIG_CPU_SW_DOMAIN_PAN-breakage-on.patch | 44 +++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 target/linux/generic/patches-4.4/100-ARM-work-around-CONFIG_CPU_SW_DOMAIN_PAN-breakage-on.patch diff --git a/target/linux/generic/patches-4.4/100-ARM-work-around-CONFIG_CPU_SW_DOMAIN_PAN-breakage-on.patch b/target/linux/generic/patches-4.4/100-ARM-work-around-CONFIG_CPU_SW_DOMAIN_PAN-breakage-on.patch new file mode 100644 index 0000000000..3156a54fee --- /dev/null +++ b/target/linux/generic/patches-4.4/100-ARM-work-around-CONFIG_CPU_SW_DOMAIN_PAN-breakage-on.patch @@ -0,0 +1,44 @@ +From: Felix Fietkau +Date: Tue, 19 Jan 2016 00:18:09 +0100 +Subject: [PATCH] ARM: work around CONFIG_CPU_SW_DOMAIN_PAN breakage on ARM11 + MPCore + +Patch taken from http://www.spinics.net/lists/arm-kernel/msg450888.html + +Signed-off-by: Felix Fietkau +--- + +--- a/arch/arm/kernel/smp_tlb.c ++++ b/arch/arm/kernel/smp_tlb.c +@@ -9,6 +9,7 @@ + */ + #include + #include ++#include + + #include + #include +@@ -40,8 +41,11 @@ static inline void ipi_flush_tlb_mm(void + static inline void ipi_flush_tlb_page(void *arg) + { + struct tlb_args *ta = (struct tlb_args *)arg; ++ unsigned int __ua_flags = uaccess_save_and_enable(); + + local_flush_tlb_page(ta->ta_vma, ta->ta_start); ++ ++ uaccess_restore(__ua_flags); + } + + static inline void ipi_flush_tlb_kernel_page(void *arg) +@@ -54,8 +58,11 @@ static inline void ipi_flush_tlb_kernel_ + static inline void ipi_flush_tlb_range(void *arg) + { + struct tlb_args *ta = (struct tlb_args *)arg; ++ unsigned int __ua_flags = uaccess_save_and_enable(); + + local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end); ++ ++ uaccess_restore(__ua_flags); + } + + static inline void ipi_flush_tlb_kernel_range(void *arg)