Hi all,
On Tue, 24 Nov 2020 10:25:14 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> Today's linux-next merge of the s390 tree got a conflict in:
>
> arch/s390/include/asm/mmu_context.h
>
> between commit:
>
> 93e2dfd39438 ("s390: use asm-generic/mmu_context.h for no-op implementations")
>
> from the asm-generic tree and commits:
>
> ab177c5d00cd ("s390/mm: remove unused clear_user_asce()")
> 87d598634521 ("s390/mm: remove set_fs / rework address space handling")
>
> from the s390 tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
>
> --
> Cheers,
> Stephen Rothwell
>
> diff --cc arch/s390/include/asm/mmu_context.h
> index 66f9cf0a07e3,87a84fc59fc3..000000000000
> --- a/arch/s390/include/asm/mmu_context.h
> +++ b/arch/s390/include/asm/mmu_context.h
> @@@ -70,23 -69,8 +70,6 @@@ static inline int init_new_context(stru
> return 0;
> }
>
> - static inline void set_user_asce(struct mm_struct *mm)
> - {
> - S390_lowcore.user_asce = mm->context.asce;
> - __ctl_load(S390_lowcore.user_asce, 1, 1);
> - clear_cpu_flag(CIF_ASCE_PRIMARY);
> - }
> -
> - static inline void clear_user_asce(void)
> - {
> - S390_lowcore.user_asce = S390_lowcore.kernel_asce;
> - __ctl_load(S390_lowcore.kernel_asce, 1, 1);
> - set_cpu_flag(CIF_ASCE_PRIMARY);
> - }
> -
> - mm_segment_t enable_sacf_uaccess(void);
> - void disable_sacf_uaccess(mm_segment_t old_fs);
> -#define destroy_context(mm) do { } while (0)
> --
> static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
> struct task_struct *tsk)
> {
> @@@ -121,18 -98,18 +97,18 @@@ static inline void finish_arch_post_loc
> __tlb_flush_mm_lazy(mm);
> preempt_enable();
> }
> - set_fs(current->thread.mm_segment);
> + __ctl_load(S390_lowcore.user_asce, 7, 7);
> }
>
> -#define enter_lazy_tlb(mm,tsk) do { } while (0)
> -#define deactivate_mm(tsk,mm) do { } while (0)
> -
> +#define activate_mm activate_mm
> static inline void activate_mm(struct mm_struct *prev,
> struct mm_struct *next)
> {
> switch_mm(prev, next, current);
> cpumask_set_cpu(smp_processor_id(), mm_cpumask(next));
> - set_user_asce(next);
> + __ctl_load(S390_lowcore.user_asce, 7, 7);
> }
>
> +#include <asm-generic/mmu_context.h>
> +
> #endif /* __S390_MMU_CONTEXT_H */
This is now a conflict between the asm-generic tree and Linus' tree.
--
Cheers,
Stephen Rothwell
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