From f78e2c36609b61151b1945c7393facbff3dd1ad6 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 4 Dec 2019 09:33:52 -0800 Subject: iomap: fix sub-page uptodate handling commit 1cea335d1db1ce6ab71b3d2f94a807112b738a0f upstream. bio completions can race when a page spans more than one file system block. Add a spinlock to synchronize marking the page uptodate. Fixes: 9dc55f1389f9 ("iomap: add support for sub-pagesize buffered I/O without buffer heads") Reported-by: Jan Stancek Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong Cc: "Matthew Wilcox (Oracle)" Signed-off-by: Greg Kroah-Hartman --- include/linux/iomap.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 7aa5d6117936..53b16f104081 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -139,6 +139,7 @@ loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, struct iomap_page { atomic_t read_count; atomic_t write_count; + spinlock_t uptodate_lock; DECLARE_BITMAP(uptodate, PAGE_SIZE / 512); }; -- cgit v1.2.3