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author | Ingo Molnar <mingo@elte.hu> | 2010-10-07 09:43:11 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-10-07 09:43:11 +0200 |
commit | d4f8f217b8a5d5bd02af979650418dca4caec472 (patch) | |
tree | af047bfa9729c975e24cb7624107574e884d3a57 /arch/s390/include/asm/mmu_context.h | |
parent | 2dfbf4dfbe47a484bae20456c12b40763b9b6af7 (diff) | |
parent | 773e3f93577ffb493fb7c39b1a6ecf39b5748e87 (diff) | |
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Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu into core/rcu
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 976e273..a6f0e7c 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) |