These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / fs / splice.c

diff --git a/kernel/fs/splice.c b/kernel/fs/splice.c
index bfe62ae..4cf700d 100644 (file)
--- a/kernel/fs/splice.c
+++ b/kernel/fs/splice.c
@@ -261,6 +261,7 @@ ssize_t splice_to_pipe(struct pipe_inode_info *pipe,
 
        return ret;
 }
+EXPORT_SYMBOL_GPL(splice_to_pipe);
 
 void spd_release_page(struct splice_pipe_desc *spd, unsigned int i)
 {
@@ -359,7 +360,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
                                break;
 
                        error = add_to_page_cache_lru(page, mapping, index,
-                                               GFP_KERNEL);
+                                  mapping_gfp_constraint(mapping, GFP_KERNEL));
                        if (unlikely(error)) {
                                page_cache_release(page);
                                if (error == -EEXIST)
@@ -808,6 +809,13 @@ static int splice_from_pipe_feed(struct pipe_inode_info *pipe, struct splice_des
  */
 static int splice_from_pipe_next(struct pipe_inode_info *pipe, struct splice_desc *sd)
 {
+       /*
+        * Check for signal early to make process killable when there are
+        * always buffers available
+        */
+       if (signal_pending(current))
+               return -ERESTARTSYS;
+
        while (!pipe->nrbufs) {
                if (!pipe->writers)
                        return 0;
@@ -883,6 +891,7 @@ ssize_t __splice_from_pipe(struct pipe_inode_info *pipe, struct splice_desc *sd,
 
        splice_from_pipe_begin(sd);
        do {
+               cond_resched();
                ret = splice_from_pipe_next(pipe, sd);
                if (ret > 0)
                        ret = splice_from_pipe_feed(pipe, sd, actor);