nfsd41: define NFSD_DRC_SIZE_SHIFT in set_max_drc

Fixes the following compiler error:
fs/nfsd/nfssvc.c: In function 'set_max_drc':
fs/nfsd/nfssvc.c:240: error: 'NFSD_DRC_SIZE_SHIFT' undeclared

CONFIG_NFSD_V4 is not set

Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index e9d57734a348..469c931cca95 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -236,6 +236,8 @@ void nfsd_reset_versions(void)
  */
 static void set_max_drc(void)
 {
+        /* The percent of nr_free_buffer_pages used by the V4.1 server DRC */
+        #define NFSD_DRC_SIZE_SHIFT     7
         nfsd_serv->sv_drc_max_pages = nr_free_buffer_pages()
                                                 >> NFSD_DRC_SIZE_SHIFT;
         nfsd_serv->sv_drc_pages_used = 0;