NFS: Remove remaining dfprintks related to fscache and remove NFSDBG_FSCACHE

The fscache cookie APIs including fscache_acquire_cookie() and
fscache_relinquish_cookie() now have very good tracing. Thus,
there is no real need for dfprintks in the NFS fscache interface.

The NFS fscache interface has removed all dfprintks so remove the
NFSDBG_FSCACHE defines.

Signed-off-by: Dave Wysochanski <[e-mail]>
Signed-off-by: Trond Myklebust <[e-mail]>

fs/nfs/fscache.c

···
 #include "fscache.h"
 #include "nfstrace.h"
 
-#define NFSDBG_FACILITY		NFSDBG_FSCACHE
-
 #define NFS_MAX_KEY_LEN 1000
 
 static bool nfs_append_int(char *key, int *_len, unsigned long long x)
···
 	vcookie = fscache_acquire_volume(key,
 					 NULL, /* preferred_cache */
 					 NULL, 0 /* coherency_data */);
-	dfprintk(FSCACHE, "NFS: get superblock cookie (0x%p/0x%p)\n",
-		 nfss, vcookie);
 	if (IS_ERR(vcookie)) {
 		if (vcookie != ERR_PTR(-EBUSY)) {
 			kfree(key);
···
 void nfs_fscache_release_super_cookie(struct super_block *sb)
 {
 	struct nfs_server *nfss = NFS_SB(sb);
-
-	dfprintk(FSCACHE, "NFS: releasing superblock cookie (0x%p/0x%p)\n",
-		 nfss, nfss->fscache);
 
 	fscache_relinquish_volume(nfss->fscache, NULL, false);
 	nfss->fscache = NULL;
···
 	struct nfs_inode *nfsi = NFS_I(inode);
 	struct fscache_cookie *cookie = nfs_i_fscache(inode);
 
-	dfprintk(FSCACHE, "NFS: clear cookie (0x%p/0x%p)\n", nfsi, cookie);
-
 	fscache_relinquish_cookie(cookie, false);
 	nfsi->fscache = NULL;
 }
···
 
 	fscache_use_cookie(cookie, open_for_write);
 	if (open_for_write) {
-		dfprintk(FSCACHE, "NFS: nfsi 0x%p disabling cache\n", nfsi);
 		nfs_fscache_update_auxdata(&auxdata, inode);
 		fscache_invalidate(cookie, &auxdata, i_size_read(inode),
 				   FSCACHE_INVAL_DIO_WRITE);

include/uapi/linux/nfs_fs.h

···
 #define NFSDBG_CALLBACK		0x0100
 #define NFSDBG_CLIENT		0x0200
 #define NFSDBG_MOUNT		0x0400
-#define NFSDBG_FSCACHE		0x0800
+#define NFSDBG_FSCACHE		0x0800 /* unused */
 #define NFSDBG_PNFS		0x1000
 #define NFSDBG_PNFS_LD		0x2000
 #define NFSDBG_STATE		0x4000