1 files changed, 2 insertions, 2 deletions

diff --git a/mm/filemap.h b/mm/filemap.h
index 536979fb4ba7..3f2a343c6015 100644
--- a/mm/filemap.h
+++ b/mm/filemap.h
@@ -88,7 +88,7 @@ filemap_set_next_iovec(const struct iovec **iovp, size_t *basep, size_t bytes)
         const struct iovec *iov = *iovp;
         size_t base = *basep;
 
-        while (bytes) {
+        do {
                 int copy = min(bytes, iov->iov_len - base);
 
                 bytes -= copy;
@@ -97,7 +97,7 @@ filemap_set_next_iovec(const struct iovec **iovp, size_t *basep, size_t bytes)
                         iov++;
                         base = 0;
                 }
-        }
+        } while (bytes);
         *iovp = iov;
         *basep = base;
 }