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authorSteven Whitehouse <swhiteho@redhat.com>2014-02-06 15:47:47 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2014-02-06 15:47:47 +0000
commit774016b2d455017935b3e318b6cc4e055e9dd47f (patch)
tree5f2881c744990f7581f8aea9985079d532475812 /fs/fs-writeback.c
parentb2c8b3ea871e478ac144f617d015d3aa55fc3aa8 (diff)
downloadlwn-774016b2d455017935b3e318b6cc4e055e9dd47f.tar.gz
lwn-774016b2d455017935b3e318b6cc4e055e9dd47f.zip
GFS2: journal data writepages update
GFS2 has carried what is more or less a copy of the write_cache_pages() for some time. It seems that this copy has slipped behind the core code over time. This patch brings it back uptodate, and in addition adds the tracepoint which would otherwise be missing. We could go further, and eliminate some or all of the code duplication here. The issue is that if we do that, then the function we need to split out from the existing write_cache_pages(), which will look a lot like gfs2_jdata_write_pagevec(), would land up putting quite a lot of extra variables on the stack. I know that has been a problem in the past in the writeback code path, which is why I've hesitated to do it here. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/fs-writeback.c')
-rw-r--r--fs/fs-writeback.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index e0259a163f98..82a1456a3cc8 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -94,6 +94,8 @@ static inline struct inode *wb_inode(struct list_head *head)
#define CREATE_TRACE_POINTS
#include <trace/events/writeback.h>
+EXPORT_TRACEPOINT_SYMBOL_GPL(wbc_writepage);
+
static void bdi_queue_work(struct backing_dev_info *bdi,
struct wb_writeback_work *work)
{