1 files changed, 6 insertions, 2 deletions

diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index d67c8288d95d..9e8c7386b3a0 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -144,7 +144,7 @@ static size_t copy_page_to_iter_iovec(struct page *page, size_t offset, size_t b
         buf = iov->iov_base + skip;
         copy = min(bytes, iov->iov_len - skip);
 
-        if (!fault_in_pages_writeable(buf, copy)) {
+        if (IS_ENABLED(CONFIG_HIGHMEM) && !fault_in_pages_writeable(buf, copy)) {
                 kaddr = kmap_atomic(page);
                 from = kaddr + offset;
 
@@ -175,6 +175,7 @@ static size_t copy_page_to_iter_iovec(struct page *page, size_t offset, size_t b
                 copy = min(bytes, iov->iov_len - skip);
         }
         /* Too bad - revert to non-atomic kmap */
+
         kaddr = kmap(page);
         from = kaddr + offset;
         left = __copy_to_user(buf, from, copy);
@@ -193,6 +194,7 @@ static size_t copy_page_to_iter_iovec(struct page *page, size_t offset, size_t b
                 bytes -= copy;
         }
         kunmap(page);
+
 done:
         if (skip == iov->iov_len) {
                 iov++;
@@ -225,7 +227,7 @@ static size_t copy_page_from_iter_iovec(struct page *page, size_t offset, size_t
         buf = iov->iov_base + skip;
         copy = min(bytes, iov->iov_len - skip);
 
-        if (!fault_in_pages_readable(buf, copy)) {
+        if (IS_ENABLED(CONFIG_HIGHMEM) && !fault_in_pages_readable(buf, copy)) {
                 kaddr = kmap_atomic(page);
                 to = kaddr + offset;
 
@@ -256,6 +258,7 @@ static size_t copy_page_from_iter_iovec(struct page *page, size_t offset, size_t
                 copy = min(bytes, iov->iov_len - skip);
         }
         /* Too bad - revert to non-atomic kmap */
+
         kaddr = kmap(page);
         to = kaddr + offset;
         left = __copy_from_user(to, buf, copy);
@@ -274,6 +277,7 @@ static size_t copy_page_from_iter_iovec(struct page *page, size_t offset, size_t
                 bytes -= copy;
         }
         kunmap(page);
+
 done:
         if (skip == iov->iov_len) {
                 iov++;