[GFS2] Spelling sentinal -> sentinel

A spelling mistake (one of mine).

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/ops_address.c

@@ -262,7 +262,7 @@ static int gfs2_readpage(struct file *file, struct page *page)
 	int error;
 	int do_unlock = 0;
 
-	if (likely(file != &gfs2_internal_file_sentinal)) {
+	if (likely(file != &gfs2_internal_file_sentinel)) {
 		if (file) {
 			struct gfs2_file *gf = file->private_data;
 			if (test_bit(GFF_EXLOCK, &gf->f_flags))
@@ -285,7 +285,7 @@ skip_lock:
 	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
 		error = -EIO;
 
-	if (file != &gfs2_internal_file_sentinal) {
+	if (file != &gfs2_internal_file_sentinel) {
 		gfs2_glock_dq_m(1, &gh);
 		gfs2_holder_uninit(&gh);
 	}
@@ -324,7 +324,7 @@ static int gfs2_readpages(struct file *file, struct address_space *mapping,
 	int ret;
 	int do_unlock = 0;
 
-	if (likely(file != &gfs2_internal_file_sentinal)) {
+	if (likely(file != &gfs2_internal_file_sentinel)) {
 		if (file) {
 			struct gfs2_file *gf = file->private_data;
 			if (test_bit(GFF_EXLOCK, &gf->f_flags))

fs/gfs2/ops_file.c

@@ -79,7 +79,7 @@ struct filldir_reg {
  * any other part of this. Its use is purely as a flag so that we
  * know (in readpage()) whether or not do to locking.
  */
-struct file gfs2_internal_file_sentinal = {
+struct file gfs2_internal_file_sentinel = {
 	.f_flags = O_NOATIME|O_RDONLY,
 };
 
@@ -112,7 +112,7 @@ int gfs2_internal_read(struct gfs2_inode *ip, struct file_ra_state *ra_state,
 	desc.count = size;
 	desc.error = 0;
 	do_generic_mapping_read(inode->i_mapping, ra_state,
-				&gfs2_internal_file_sentinal, pos, &desc,
+				&gfs2_internal_file_sentinel, pos, &desc,
 				gfs2_read_actor);
 	return desc.written ? desc.written : desc.error;
 }

fs/gfs2/ops_file.h

@@ -9,7 +9,7 @@
 
 #ifndef __OPS_FILE_DOT_H__
 #define __OPS_FILE_DOT_H__
-extern struct file gfs2_internal_file_sentinal;
+extern struct file gfs2_internal_file_sentinel;
 extern int gfs2_internal_read(struct gfs2_inode *ip,
 			      struct file_ra_state *ra_state,
 			      char *buf, loff_t *pos, unsigned size);