Commit e7296331 authored by Pavel Tatashin's avatar Pavel Tatashin Committed by Greg Kroah-Hartman

sparc64: combine activate_mm and switch_mm


[ Upstream commit 14d0334c ]

The only difference between these two functions is that in activate_mm we
unconditionally flush context. However, there is no need to keep this
difference after fixing a bug where cpumask was not reset on a wrap. So, in
this patch we combine these.
Signed-off-by: default avatarPavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: default avatarBob Picco <bob.picco@oracle.com>
Reviewed-by: default avatarSteven Sistare <steven.sistare@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4c0cae48
...@@ -131,26 +131,7 @@ static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, str ...@@ -131,26 +131,7 @@ static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, str
} }
#define deactivate_mm(tsk,mm) do { } while (0) #define deactivate_mm(tsk,mm) do { } while (0)
#define activate_mm(active_mm, mm) switch_mm(active_mm, mm, NULL)
/* Activate a new MM instance for the current task. */
static inline void activate_mm(struct mm_struct *active_mm, struct mm_struct *mm)
{
unsigned long flags;
int cpu;
spin_lock_irqsave(&mm->context.lock, flags);
if (!CTX_VALID(mm->context))
get_new_mmu_context(mm);
cpu = smp_processor_id();
if (!cpumask_test_cpu(cpu, mm_cpumask(mm)))
cpumask_set_cpu(cpu, mm_cpumask(mm));
load_secondary_context(mm);
__flush_tlb_mm(CTX_HWBITS(mm->context), SECONDARY_CONTEXT);
tsb_context_switch(mm);
spin_unlock_irqrestore(&mm->context.lock, flags);
}
#endif /* !(__ASSEMBLY__) */ #endif /* !(__ASSEMBLY__) */
#endif /* !(__SPARC64_MMU_CONTEXT_H) */ #endif /* !(__SPARC64_MMU_CONTEXT_H) */
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