linux-kernel - [PATCH v4 62/73] dax: Convert dax_insert_pfn

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Message-Id: <20171206004159.3755-63-willy@infradead.org>
Date:   Tue,  5 Dec 2017 16:41:48 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Matthew Wilcox <mawilcox@...rosoft.com>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Jens Axboe <axboe@...nel.dk>,
        Rehas Sachdeva <aquannie@...il.com>, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-nilfs@...r.kernel.org, linux-btrfs@...r.kernel.org,
        linux-xfs@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 62/73] dax: Convert dax_insert_pfn_mkwrite to XArray

From: Matthew Wilcox <mawilcox@...rosoft.com>

Signed-off-by: Matthew Wilcox <mawilcox@...rosoft.com>
---
 fs/dax.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/dax.c b/fs/dax.c
index 7bd94f1b61d0..619aff70583f 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1498,21 +1498,21 @@ static int dax_insert_pfn_mkwrite(struct vm_fault *vmf,
 	void *entry;
 	int vmf_ret, error;
 
-	xa_lock_irq(&mapping->pages);
+	xas_lock_irq(&xas);
 	entry = get_unlocked_mapping_entry(&xas);
 	/* Did we race with someone splitting entry or so? */
 	if (!entry ||
 	    (pe_size == PE_SIZE_PTE && !dax_is_pte_entry(entry)) ||
 	    (pe_size == PE_SIZE_PMD && !dax_is_pmd_entry(entry))) {
 		put_unlocked_mapping_entry(&xas, entry);
-		xa_unlock_irq(&mapping->pages);
+		xas_unlock_irq(&xas);
 		trace_dax_insert_pfn_mkwrite_no_entry(mapping->host, vmf,
 						      VM_FAULT_NOPAGE);
 		return VM_FAULT_NOPAGE;
 	}
-	radix_tree_tag_set(&mapping->pages, index, PAGECACHE_TAG_DIRTY);
+	xas_set_tag(&xas, PAGECACHE_TAG_DIRTY);
 	entry = lock_slot(&xas);
-	xa_unlock_irq(&mapping->pages);
+	xas_unlock_irq(&xas);
 	switch (pe_size) {
 	case PE_SIZE_PTE:
 		error = vm_insert_mixed_mkwrite(vmf->vma, vmf->address, pfn);
-- 
2.15.0