Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>

fs/nfsd/nfs3xdr.c

@@ -702,7 +702,7 @@ nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
 		*p++ = htonl(resp->eof);
 		*p++ = htonl(resp->count);	/* xdr opaque count */
 		xdr_ressize_check(rqstp, p);
-		/* now update rqstp->rq_res to reflect data aswell */
+		/* now update rqstp->rq_res to reflect data as well */
 		rqstp->rq_res.page_len = resp->count;
 		if (resp->count & 3) {
 			/* need to pad the tail */

fs/nfsd/nfs4state.c

@@ -3055,7 +3055,7 @@ check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
 	if (ONE_STATEID(stateid) && (flags & RD_STATE))
 		return nfs_ok;
 	else if (locks_in_grace()) {
-		/* Answer in remaining cases depends on existance of
+		/* Answer in remaining cases depends on existence of
 		 * conflicting state; so we must wait out the grace period. */
 		return nfserr_grace;
 	} else if (flags & WR_STATE)
@@ -3675,7 +3675,7 @@ find_lockstateowner_str(struct inode *inode, clientid_t *clid,
 /*
  * Alloc a lock owner structure.
  * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 
- * occured. 
+ * occurred. 
  *
  * strhashval = lock_ownerstr_hashval 
  */

fs/nfsd/nfsxdr.c

@@ -451,7 +451,7 @@ nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
 	*p++ = htonl(resp->count);
 	xdr_ressize_check(rqstp, p);
 
-	/* now update rqstp->rq_res to reflect data aswell */
+	/* now update rqstp->rq_res to reflect data as well */
 	rqstp->rq_res.page_len = resp->count;
 	if (resp->count & 3) {
 		/* need to pad the tail */