[PATCH] make "struct d_cookie" depend on CONFIG_PROFILING

Shrinks "struct dentry" from 128 bytes to 124 on x86, allowing 31 objects
per slab instead of 30.

Cc: John Levon <levon@movementarian.org>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index a3ed5e059d47..a3f09947940e 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -108,7 +108,9 @@ struct dentry {
         struct dentry_operations *d_op;
         struct super_block *d_sb;       /* The root of the dentry tree */
         void *d_fsdata;                 /* fs-specific data */
+#ifdef CONFIG_PROFILING
         struct dcookie_struct *d_cookie; /* cookie, if any */
+#endif
         int d_mounted;
         unsigned char d_iname[DNAME_INLINE_LEN_MIN];    /* small names */
 };