[PATCH v2 25/61] arch/parisc: Remove mmap linked list from kernel/cache
Liam Howlett
liam.howlett at oracle.com
Tue Aug 17 08:47:19 PDT 2021
From: "Liam R. Howlett" <Liam.Howlett at Oracle.com>
Start using the maple tree
Signed-off-by: Liam R. Howlett <Liam.Howlett at Oracle.com>
---
arch/parisc/kernel/cache.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 39e02227e231..f6316aafba10 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -519,9 +519,13 @@ static inline unsigned long mm_total_size(struct mm_struct *mm)
{
struct vm_area_struct *vma;
unsigned long usize = 0;
+ MA_STATE(mas, &mm->mm_mt, 0, 0);
- for (vma = mm->mmap; vma; vma = vma->vm_next)
+ rcu_read_lock();
+ mas_for_each(&mas, vma, ULONG_MAX)
usize += vma->vm_end - vma->vm_start;
+ rcu_read_unlock();
+
return usize;
}
@@ -547,6 +551,7 @@ void flush_cache_mm(struct mm_struct *mm)
{
struct vm_area_struct *vma;
pgd_t *pgd;
+ MA_STATE(mas, &mm->mm_mt, 0, 0);
/* Flushing the whole cache on each cpu takes forever on
rp3440, etc. So, avoid it if the mm isn't too big. */
@@ -559,17 +564,20 @@ void flush_cache_mm(struct mm_struct *mm)
}
if (mm->context == mfsp(3)) {
- for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ rcu_read_lock();
+ mas_for_each(&mas, vma, ULONG_MAX) {
flush_user_dcache_range_asm(vma->vm_start, vma->vm_end);
if (vma->vm_flags & VM_EXEC)
flush_user_icache_range_asm(vma->vm_start, vma->vm_end);
flush_tlb_range(vma, vma->vm_start, vma->vm_end);
}
+ rcu_read_unlock();
return;
}
pgd = mm->pgd;
- for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ rcu_read_lock();
+ mas_for_each(&mas, vma, ULONG_MAX) {
unsigned long addr;
for (addr = vma->vm_start; addr < vma->vm_end;
@@ -589,6 +597,7 @@ void flush_cache_mm(struct mm_struct *mm)
}
}
}
+ rcu_read_unlock();
}
void flush_cache_range(struct vm_area_struct *vma,
--
2.30.2
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