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| author |   Catalin Marinas <catalin.marinas@arm.com> | 2011-11-28 15:59:10 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2012-04-17 15:29:37 +0100 |
| commit | e323969ccda2d69f02e047c08b03faa09215c72a (patch) | |
| tree | 27ed693ec5bb114773f267722bdd0db371a4f5a2 /arch/arm/include/asm/mmu_context.h | |
| parent | ARM: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW on ASID-capable CPUs (diff) | |
| download | linux-dev-e323969ccda2d69f02e047c08b03faa09215c72a.tar.xz linux-dev-e323969ccda2d69f02e047c08b03faa09215c72a.zip | |
ARM: Remove current_mm per-cpu variable
The current_mm variable was used to store the new mm between the
switch_mm() and switch_to() calls where an IPI to reset the context
could have set the wrong mm. Since the interrupts are disabled during
context switch, there is no need for this variable, current->active_mm
already points to the current mm when interrupts are re-enabled.
Reviewed-by: Will Deacon <will.deacon@arm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Frank Rowand <frank.rowand@am.sony.com>
Tested-by: Marc Zyngier <Marc.Zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm/include/asm/mmu_context.h')
| -rw-r--r-- | arch/arm/include/asm/mmu_context.h | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/arm/include/asm/mmu_context.h b/arch/arm/include/asm/mmu_context.h index 94e265cb5146..8da4b9c042fe 100644 --- a/arch/arm/include/asm/mmu_context.h +++ b/arch/arm/include/asm/mmu_context.h @@ -43,9 +43,6 @@ void __check_kvm_seq(struct mm_struct *mm); #define ASID_FIRST_VERSION (1 << ASID_BITS) extern unsigned int cpu_last_asid; -#ifdef CONFIG_SMP -DECLARE_PER_CPU(struct mm_struct *, current_mm); -#endif void __init_new_context(struct task_struct *tsk, struct mm_struct *mm); void __new_context(struct mm_struct *mm); @@ -160,10 +157,6 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next, __flush_icache_all(); #endif if (!cpumask_test_and_set_cpu(cpu, mm_cpumask(next)) || prev != next) { -#ifdef CONFIG_SMP - struct mm_struct **crt_mm = &per_cpu(current_mm, cpu); - *crt_mm = next; -#endif check_and_switch_context(next, tsk); if (cache_is_vivt()) cpumask_clear_cpu(cpu, mm_cpumask(prev)); |