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| author | David S. Miller <davem@davemloft.net> | 2010-09-08 23:49:04 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-08 23:49:04 -0700 |
| commit | e199e6136ce6b151e6638ae93dca60748424d900 (patch) | |
| tree | 0d66e0b5d227c36b005e4f5537f4bbcfc6ed4904 /arch/s390/include/asm/mmu_context.h | |
| parent | 972c40b5bee429c84ba727f8ac0a08292bc5dc3d (diff) | |
| parent | d56557af19867edb8c0e96f8e26399698a08857f (diff) | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/s390/include/asm/mmu_context.h')
| -rw-r--r-- | arch/s390/include/asm/mmu_context.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h index 976e273988c..a6f0e7cc9cd 100644 --- a/arch/s390/include/asm/mmu_context.h +++ b/arch/s390/include/asm/mmu_context.h @@ -11,11 +11,14 @@ #include <asm/pgalloc.h> #include <asm/uaccess.h> +#include <asm/tlbflush.h> #include <asm-generic/mm_hooks.h> static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { + atomic_set(&mm->context.attach_count, 0); + mm->context.flush_mm = 0; mm->context.asce_bits = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS; #ifdef CONFIG_64BIT mm->context.asce_bits |= _ASCE_TYPE_REGION3; @@ -76,6 +79,12 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, { cpumask_set_cpu(smp_processor_id(), mm_cpumask(next)); update_mm(next, tsk); + atomic_dec(&prev->context.attach_count); + WARN_ON(atomic_read(&prev->context.attach_count) < 0); + atomic_inc(&next->context.attach_count); + /* Check for TLBs not flushed yet */ + if (next->context.flush_mm) + __tlb_flush_mm(next); } #define enter_lazy_tlb(mm,tsk) do { } while (0) |