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authorPavel Tatashin <pasha.tatashin@oracle.com>2017-05-31 18:25:23 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-06-14 16:05:53 +0300
commit975f3cdc39154ccf7f339185883ef55933b85a77 (patch)
treeee8531bb87f0d7026e73e0d57bc3a7cec5c21cb3 /arch/sparc/include
parent7932bfad0e826c03dfef488cda89143697c81dfe (diff)
downloadlinux-975f3cdc39154ccf7f339185883ef55933b85a77.tar.xz
sparc64: add per-cpu mm of secondary contexts
[ Upstream commit 7a5b4bbf49fe86ce77488a70c5dccfe2d50d7a2d ] The new wrap is going to use information from this array to figure out mm's that currently have valid secondary contexts setup. Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Reviewed-by: Bob Picco <bob.picco@oracle.com> Reviewed-by: Steven Sistare <steven.sistare@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/sparc/include')
-rw-r--r--arch/sparc/include/asm/mmu_context_64.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/sparc/include/asm/mmu_context_64.h b/arch/sparc/include/asm/mmu_context_64.h
index 266662a897ac..eb410865c8de 100644
--- a/arch/sparc/include/asm/mmu_context_64.h
+++ b/arch/sparc/include/asm/mmu_context_64.h
@@ -17,6 +17,7 @@ extern spinlock_t ctx_alloc_lock;
extern unsigned long tlb_context_cache;
extern unsigned long mmu_context_bmap[];
+DECLARE_PER_CPU(struct mm_struct *, per_cpu_secondary_mm);
void get_new_mmu_context(struct mm_struct *mm);
#ifdef CONFIG_SMP
void smp_new_mmu_context_version(void);
@@ -74,8 +75,9 @@ void __flush_tlb_mm(unsigned long, unsigned long);
static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, struct task_struct *tsk)
{
unsigned long ctx_valid, flags;
- int cpu;
+ int cpu = smp_processor_id();
+ per_cpu(per_cpu_secondary_mm, cpu) = mm;
if (unlikely(mm == &init_mm))
return;
@@ -121,7 +123,6 @@ static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, str
* for the first time, we must flush that context out of the
* local TLB.
*/
- cpu = smp_processor_id();
if (!ctx_valid || !cpumask_test_cpu(cpu, mm_cpumask(mm))) {
cpumask_set_cpu(cpu, mm_cpumask(mm));
__flush_tlb_mm(CTX_HWBITS(mm->context),