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Message-Id: <200906132225.12855.rusty@rustcorp.com.au>
Date: Sat, 13 Jun 2009 22:25:12 +0930
From: Rusty Russell <rusty@...tcorp.com.au>
To: Russell King <rmk+lkml@....linux.org.uk>
Cc: linux-kernel@...r.kernel.org, Mike Travis <travis@....com>
Subject: Re: [PATCH 1/13] cpumask: Use accessors for cpu_*_mask: arm
On Sat, 13 Jun 2009 04:33:03 am Russell King wrote:
> On Fri, Jun 12, 2009 at 10:33:14PM +0930, Rusty Russell wrote:
> > Use the accessors rather than frobbing bits directly (the new versions
> > are const).
>
> Please check linux-next - there are all kinds of SMP changes currently
> queued up in the ARM tree, which include most of the updates for things
> like this.
OK, here's the revision based on latest linux-next, if you wouldn't mind
taking it. (We should really make on_each_cpu_mask an arch-indep, too).
Thanks,
Rusty.
Subject: cpumask: use mm_cpumask() wrapper: arm
Makes code futureproof against the impending change to mm->cpu_vm_mask.
It's also a chance to use the new cpumask_ ops which take a pointer
(the older ones are deprecated, but there's no hurry for arch code).
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
index 6cbd8fd..b425fb2 100644
--- a/arch/arm/include/asm/cacheflush.h
+++ b/arch/arm/include/asm/cacheflush.h
@@ -318,14 +318,14 @@ static inline void outer_flush_range(unsigned long start, unsigned long end)
#ifndef CONFIG_CPU_CACHE_VIPT
static inline void flush_cache_mm(struct mm_struct *mm)
{
- if (cpu_isset(smp_processor_id(), mm->cpu_vm_mask))
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm)))
__cpuc_flush_user_all();
}
static inline void
flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
{
- if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask))
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm)))
__cpuc_flush_user_range(start & PAGE_MASK, PAGE_ALIGN(end),
vma->vm_flags);
}
@@ -333,7 +333,7 @@ flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long
static inline void
flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn)
{
- if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
unsigned long addr = user_addr & PAGE_MASK;
__cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags);
}
@@ -344,7 +344,7 @@ flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
unsigned long uaddr, void *kaddr,
unsigned long len, int write)
{
- if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
unsigned long addr = (unsigned long)kaddr;
__cpuc_coherent_kern_range(addr, addr + len);
}
diff --git a/arch/arm/include/asm/mmu_context.h b/arch/arm/include/asm/mmu_context.h
index 263fed0..c3fe09f 100644
--- a/arch/arm/include/asm/mmu_context.h
+++ b/arch/arm/include/asm/mmu_context.h
@@ -101,14 +101,15 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
#ifdef CONFIG_SMP
/* check for possible thread migration */
- if (!cpus_empty(next->cpu_vm_mask) && !cpu_isset(cpu, next->cpu_vm_mask))
+ if (!cpumask_empty(mm_cpumask(next)) &&
+ !cpumask_test_cpu(cpu, mm_cpumask(next)))
__flush_icache_all();
#endif
- if (!cpu_test_and_set(cpu, next->cpu_vm_mask) || prev != next) {
+ if (!cpumask_test_and_set_cpu(cpu, mm_cpumask(next)) || prev != next) {
check_context(next);
cpu_switch_mm(next->pgd, next);
if (cache_is_vivt())
- cpu_clear(cpu, prev->cpu_vm_mask);
+ cpumask_clear_cpu(cpu, mm_cpumask(prev));
}
#endif
}
diff --git a/arch/arm/include/asm/tlbflush.h b/arch/arm/include/asm/tlbflush.h
index b543a05..5d0fbb0 100644
--- a/arch/arm/include/asm/tlbflush.h
+++ b/arch/arm/include/asm/tlbflush.h
@@ -316,7 +316,7 @@ static inline void local_flush_tlb_mm(struct mm_struct *mm)
if (tlb_flag(TLB_WB))
dsb();
- if (cpu_isset(smp_processor_id(), mm->cpu_vm_mask)) {
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm))) {
if (tlb_flag(TLB_V3_FULL))
asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (zero) : "cc");
if (tlb_flag(TLB_V4_U_FULL))
@@ -354,7 +354,7 @@ local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
if (tlb_flag(TLB_WB))
dsb();
- if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
if (tlb_flag(TLB_V3_PAGE))
asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (uaddr) : "cc");
if (tlb_flag(TLB_V4_U_PAGE))
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 55fa7ff..03cf0d5 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -183,7 +183,7 @@ int __cpuexit __cpu_disable(void)
read_lock(&tasklist_lock);
for_each_process(p) {
if (p->mm)
- cpu_clear(cpu, p->mm->cpu_vm_mask);
+ cpumask_clear_cpu(cpu, mm_cpumask(p->mm));
}
read_unlock(&tasklist_lock);
@@ -251,7 +251,7 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
atomic_inc(&mm->mm_users);
atomic_inc(&mm->mm_count);
current->active_mm = mm;
- cpu_set(cpu, mm->cpu_vm_mask);
+ cpumask_set_cpu(cpu, mm_cpumask(mm));
cpu_switch_mm(mm->pgd, mm);
enter_lazy_tlb(mm, current);
local_flush_tlb_all();
@@ -600,14 +600,14 @@ void flush_tlb_all(void)
void flush_tlb_mm(struct mm_struct *mm)
{
- cpumask_t mask = mm->cpu_vm_mask;
+ cpumask_t mask = *mm_cpumask(mm);
on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mask);
}
void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
{
- cpumask_t mask = vma->vm_mm->cpu_vm_mask;
+ cpumask_t mask = *mm_cpumask(vma->vm_mm);
struct tlb_args ta;
ta.ta_vma = vma;
@@ -628,7 +628,7 @@ void flush_tlb_kernel_page(unsigned long kaddr)
void flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
- cpumask_t mask = vma->vm_mm->cpu_vm_mask;
+ cpumask_t mask = *cpumask_mm(vma->vm_mm);
struct tlb_args ta;
ta.ta_vma = vma;
diff --git a/arch/arm/mm/context.c b/arch/arm/mm/context.c
index fc84fcc..6bda76a 100644
--- a/arch/arm/mm/context.c
+++ b/arch/arm/mm/context.c
@@ -59,6 +59,6 @@ void __new_context(struct mm_struct *mm)
}
spin_unlock(&cpu_asid_lock);
- mm->cpu_vm_mask = cpumask_of_cpu(smp_processor_id());
+ cpumask_copy(mm_cpumask(mm), cpumask_of(smp_processor_id()));
mm->context.id = asid;
}
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index 0fa9bf3..527d816 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -41,7 +41,7 @@ static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr)
void flush_cache_mm(struct mm_struct *mm)
{
if (cache_is_vivt()) {
- if (cpu_isset(smp_processor_id(), mm->cpu_vm_mask))
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm)))
__cpuc_flush_user_all();
return;
}
@@ -59,7 +59,7 @@ void flush_cache_mm(struct mm_struct *mm)
void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
{
if (cache_is_vivt()) {
- if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask))
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm)))
__cpuc_flush_user_range(start & PAGE_MASK, PAGE_ALIGN(end),
vma->vm_flags);
return;
@@ -78,7 +78,7 @@ void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned
void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn)
{
if (cache_is_vivt()) {
- if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
unsigned long addr = user_addr & PAGE_MASK;
__cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags);
}
@@ -94,7 +94,7 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
unsigned long len, int write)
{
if (cache_is_vivt()) {
- if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
unsigned long addr = (unsigned long)kaddr;
__cpuc_coherent_kern_range(addr, addr + len);
}
@@ -107,7 +107,7 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
}
/* VIPT non-aliasing cache */
- if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask) &&
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm)) &&
vma->vm_flags & VM_EXEC) {
unsigned long addr = (unsigned long)kaddr;
/* only flushing the kernel mapping on non-aliasing VIPT */
--
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