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SubjectRe: mmotm 2018-04-05-16-59 uploaded
On Thu, Apr 05, 2018 at 05:00:09PM -0700, akpm@linux-foundation.org wrote:
> The mm-of-the-moment snapshot 2018-04-05-16-59 has been uploaded to
>
> http://www.ozlabs.org/~akpm/mmotm/

> * page-cache-use-xa_lock.patch

Hi Andrew. Could I trouble you to add page-cache-use-xa_lock-fix.patch?

---
arch/nds32/include/asm/cacheflush.h | 4 ++--
fs/dax.c | 6 +++---
2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/nds32/include/asm/cacheflush.h b/arch/nds32/include/asm/cacheflush.h
index 7b9b20a381cb..1240f148ec0f 100644
--- a/arch/nds32/include/asm/cacheflush.h
+++ b/arch/nds32/include/asm/cacheflush.h
@@ -34,8 +34,8 @@ void flush_anon_page(struct vm_area_struct *vma,
void flush_kernel_dcache_page(struct page *page);
void flush_icache_range(unsigned long start, unsigned long end);
void flush_icache_page(struct vm_area_struct *vma, struct page *page);
-#define flush_dcache_mmap_lock(mapping) spin_lock_irq(&(mapping)->tree_lock)
-#define flush_dcache_mmap_unlock(mapping) spin_unlock_irq(&(mapping)->tree_lock)
+#define flush_dcache_mmap_lock(mapping) xa_lock_irq(&(mapping)->i_pages)
+#define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&(mapping)->i_pages)

#else
#include <asm-generic/cacheflush.h>
diff --git a/fs/dax.c b/fs/dax.c
index fef7d458fd7d..aaec72ded1b6 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -499,7 +499,7 @@ static int __dax_invalidate_mapping_entry(struct address_space *mapping,
void *entry;
struct radix_tree_root *pages = &mapping->i_pages;

- xa_lock_irq(&mapping->i_pages);
+ xa_lock_irq(pages);
entry = get_unlocked_mapping_entry(mapping, index, NULL);
if (!entry || WARN_ON_ONCE(!radix_tree_exceptional_entry(entry)))
goto out;
@@ -513,7 +513,7 @@ static int __dax_invalidate_mapping_entry(struct address_space *mapping,
ret = 1;
out:
put_unlocked_mapping_entry(mapping, index, entry);
- xa_unlock_irq(&mapping->i_pages);
+ xa_unlock_irq(pages);
return ret;
}
/*
@@ -600,7 +600,7 @@ static void *dax_insert_mapping_entry(struct address_space *mapping,
unmap_mapping_pages(mapping, vmf->pgoff, 1, false);
}

- xa_lock_irq(&mapping->i_pages);
+ xa_lock_irq(pages);
new_entry = dax_radix_locked_entry(pfn, flags);
if (dax_entry_size(entry) != dax_entry_size(new_entry)) {
dax_disassociate_entry(entry, mapping, false);
--
2.16.3
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