1 files changed, 24 insertions, 11 deletions

diff --git a/fs/splice.c b/fs/splice.c
index 49fb9f129938..da74583a00ee 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -74,7 +74,7 @@ static int page_cache_pipe_buf_steal(struct pipe_inode_info *pipe,
 		wait_on_page_writeback(page);
 
 		if (PagePrivate(page))
-			try_to_release_page(page, mapping_gfp_mask(mapping));
+			try_to_release_page(page, GFP_KERNEL);
 
 		/*
 		 * If we succeeded in removing the mapping, set LRU flag
@@ -333,7 +333,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
 				break;
 
 			error = add_to_page_cache_lru(page, mapping, index,
-					      mapping_gfp_mask(mapping));
+					      GFP_KERNEL);
 			if (unlikely(error)) {
 				page_cache_release(page);
 				if (error == -EEXIST)
@@ -557,7 +557,6 @@ static int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
 {
 	struct file *file = sd->file;
 	struct address_space *mapping = file->f_mapping;
-	gfp_t gfp_mask = mapping_gfp_mask(mapping);
 	unsigned int offset, this_len;
 	struct page *page;
 	pgoff_t index;
@@ -591,7 +590,7 @@ static int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
 			goto find_page;
 
 		page = buf->page;
-		if (add_to_page_cache(page, mapping, index, gfp_mask)) {
+		if (add_to_page_cache(page, mapping, index, GFP_KERNEL)) {
 			unlock_page(page);
 			goto find_page;
 		}
@@ -613,7 +612,7 @@ find_page:
 			 * This will also lock the page
 			 */
 			ret = add_to_page_cache_lru(page, mapping, index,
-						    gfp_mask);
+						    GFP_KERNEL);
 			if (unlikely(ret))
 				goto out;
 		}
@@ -1110,6 +1109,19 @@ out_release:
 EXPORT_SYMBOL(do_splice_direct);
 
 /*
+ * After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same
+ * location, so checking ->i_pipe is not enough to verify that this is a
+ * pipe.
+ */
+static inline struct pipe_inode_info *pipe_info(struct inode *inode)
+{
+	if (S_ISFIFO(inode->i_mode))
+		return inode->i_pipe;
+
+	return NULL;
+}
+
+/*
  * Determine where to splice to/from.
  */
 static long do_splice(struct file *in, loff_t __user *off_in,
@@ -1120,7 +1132,7 @@ static long do_splice(struct file *in, loff_t __user *off_in,
 	loff_t offset, *off;
 	long ret;
 
-	pipe = in->f_dentry->d_inode->i_pipe;
+	pipe = pipe_info(in->f_dentry->d_inode);
 	if (pipe) {
 		if (off_in)
 			return -ESPIPE;
@@ -1141,7 +1153,7 @@ static long do_splice(struct file *in, loff_t __user *off_in,
 		return ret;
 	}
 
-	pipe = out->f_dentry->d_inode->i_pipe;
+	pipe = pipe_info(out->f_dentry->d_inode);
 	if (pipe) {
 		if (off_out)
 			return -ESPIPE;
@@ -1299,7 +1311,7 @@ static int get_iovec_page_array(const struct iovec __user *iov,
 static long do_vmsplice(struct file *file, const struct iovec __user *iov,
 			unsigned long nr_segs, unsigned int flags)
 {
-	struct pipe_inode_info *pipe = file->f_dentry->d_inode->i_pipe;
+	struct pipe_inode_info *pipe;
 	struct page *pages[PIPE_BUFFERS];
 	struct partial_page partial[PIPE_BUFFERS];
 	struct splice_pipe_desc spd = {
@@ -1309,7 +1321,8 @@ static long do_vmsplice(struct file *file, const struct iovec __user *iov,
 		.ops = &user_page_pipe_buf_ops,
 	};
 
-	if (unlikely(!pipe))
+	pipe = pipe_info(file->f_dentry->d_inode);
+	if (!pipe)
 		return -EBADF;
 	if (unlikely(nr_segs > UIO_MAXIOV))
 		return -EINVAL;
@@ -1536,8 +1549,8 @@ static int link_pipe(struct pipe_inode_info *ipipe,
 static long do_tee(struct file *in, struct file *out, size_t len,
 		   unsigned int flags)
 {
-	struct pipe_inode_info *ipipe = in->f_dentry->d_inode->i_pipe;
-	struct pipe_inode_info *opipe = out->f_dentry->d_inode->i_pipe;
+	struct pipe_inode_info *ipipe = pipe_info(in->f_dentry->d_inode);
+	struct pipe_inode_info *opipe = pipe_info(out->f_dentry->d_inode);
 	int ret = -EINVAL;
 
 	/*