From: Andreas Gruenbacher <agruenba@redhat.com>
Date: Thu, 5 May 2022 10:37:49 +0000 (+0200)
Subject: gfs2: Clean up use of fault_in_iov_iter_{read,write}able
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6d22ff471070e21e24667be70764ee5abdfe5608;p=linux.git

gfs2: Clean up use of fault_in_iov_iter_{read,write}able

No need to store the return value of the fault_in functions in separate
variables.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 4d36c01727ad8..acc0c1d415647 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -846,12 +846,10 @@ retry_under_glock:
 		read = ret;
 
 	if (should_fault_in_pages(ret, to, &prev_count, &window_size)) {
-		size_t leftover;
-
 		gfs2_holder_allow_demote(gh);
-		leftover = fault_in_iov_iter_writeable(to, window_size);
+		window_size -= fault_in_iov_iter_writeable(to, window_size);
 		gfs2_holder_disallow_demote(gh);
-		if (leftover != window_size) {
+		if (window_size) {
 			if (gfs2_holder_queued(gh))
 				goto retry_under_glock;
 			goto retry;
@@ -915,12 +913,10 @@ retry_under_glock:
 		written = ret;
 
 	if (should_fault_in_pages(ret, from, &prev_count, &window_size)) {
-		size_t leftover;
-
 		gfs2_holder_allow_demote(gh);
-		leftover = fault_in_iov_iter_readable(from, window_size);
+		window_size -= fault_in_iov_iter_readable(from, window_size);
 		gfs2_holder_disallow_demote(gh);
-		if (leftover != window_size) {
+		if (window_size) {
 			if (gfs2_holder_queued(gh))
 				goto retry_under_glock;
 			goto retry;
@@ -983,12 +979,10 @@ retry_under_glock:
 		read += ret;
 
 	if (should_fault_in_pages(ret, to, &prev_count, &window_size)) {
-		size_t leftover;
-
 		gfs2_holder_allow_demote(&gh);
-		leftover = fault_in_iov_iter_writeable(to, window_size);
+		window_size -= fault_in_iov_iter_writeable(to, window_size);
 		gfs2_holder_disallow_demote(&gh);
-		if (leftover != window_size) {
+		if (window_size) {
 			if (gfs2_holder_queued(&gh))
 				goto retry_under_glock;
 			goto retry;
@@ -1058,13 +1052,11 @@ retry_under_glock:
 
 	from->count = orig_count - written;
 	if (should_fault_in_pages(ret, from, &prev_count, &window_size)) {
-		size_t leftover;
-
 		gfs2_holder_allow_demote(gh);
-		leftover = fault_in_iov_iter_readable(from, window_size);
+		window_size -= fault_in_iov_iter_readable(from, window_size);
 		gfs2_holder_disallow_demote(gh);
-		if (leftover != window_size) {
-			from->count = min(from->count, window_size - leftover);
+		if (window_size) {
+			from->count = min(from->count, window_size);
 			if (gfs2_holder_queued(gh))
 				goto retry_under_glock;
 			goto retry;