[PATCH] tmpfs: let lseek return ENXIO with a negative offset

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For now, the others filesystems, such as ext4, f2fs, ubifs,
all of them return ENXIO when lseek with a negative offset.
It is better to let tmpfs return ENXIO too. After that, tmpfs
can also pass generic/448.

Signed-off-by: Yufen Yu <yuyufen@xxxxxxxxxx>
---
 mm/shmem.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 0376c124..f37bf06 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2608,9 +2608,7 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
 	inode_lock(inode);
 	/* We're holding i_mutex so we can access i_size directly */
 
-	if (offset < 0)
-		offset = -EINVAL;
-	else if (offset >= inode->i_size)
+	if (offset < 0 || offset >= inode->i_size)
 		offset = -ENXIO;
 	else {
 		start = offset >> PAGE_SHIFT;
-- 
2.7.4




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