Re: [PATCH] erofs: fix to add missing tracepoint in erofs_readahead()

[Gao Xiang]

On 2025/7/7 16:48, Chao Yu wrote:

Commit 771c994ea51f ("erofs: convert all uncompressed cases to iomap")
converts to use iomap interface, it removed trace_erofs_readahead()
tracepoint in the meantime, let's add it back.

Fixes: 771c994ea51f ("erofs: convert all uncompressed cases to iomap")

Thanks Chao, btw, should we add tracepoint to erofs_read_folio() too?

Thanks,
Gao Xiang

Signed-off-by: Chao Yu <c...@kernel.org>
---
  fs/erofs/data.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index 6a329c329f43..534ac359976e 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -356,6 +356,9 @@ static int erofs_read_folio(struct file *file, struct folio 
*folio)

static void erofs_readahead(struct readahead_control *rac)

  {
+       trace_erofs_readahead(rac->mapping->host, readahead_index(rac),
+                                       readahead_count(rac), true);
+
        return iomap_readahead(rac, &erofs_iomap_ops);
  }