1 files changed, 9 insertions, 12 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index c660527af838..eb742c07e7a4 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -425,13 +425,8 @@ static noinline int btrfs_copy_from_user(loff_t pos, int num_pages,
                 struct page *page = prepared_pages[pg];
                 /*
                  * Copy data from userspace to the current page
-                 *
-                 * Disable pagefault to avoid recursive lock since
-                 * the pages are already locked
                  */
-                pagefault_disable();
                 copied = iov_iter_copy_from_user_atomic(page, i, offset, count);
-                pagefault_enable();
 
                 /* Flush processor's dcache for this page */
                 flush_dcache_page(page);
@@ -1665,7 +1660,7 @@ again:
 static ssize_t __btrfs_direct_write(struct kiocb *iocb,
                                     const struct iovec *iov,
                                     unsigned long nr_segs, loff_t pos,
-                                    loff_t *ppos, size_t count, size_t ocount)
+                                    size_t count, size_t ocount)
 {
         struct file *file = iocb->ki_filp;
         struct iov_iter i;
@@ -1674,7 +1669,7 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb,
         loff_t endbyte;
         int err;
 
-        written = generic_file_direct_write(iocb, iov, &nr_segs, pos, ppos,
+        written = generic_file_direct_write(iocb, iov, &nr_segs, pos,
                                             count, ocount);
 
         if (written < 0 || written == count)
@@ -1693,7 +1688,7 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb,
         if (err)
                 goto out;
         written += written_buffered;
-        *ppos = pos + written_buffered;
+        iocb->ki_pos = pos + written_buffered;
         invalidate_mapping_pages(file->f_mapping, pos >> PAGE_CACHE_SHIFT,
                                  endbyte >> PAGE_CACHE_SHIFT);
 out:
@@ -1725,8 +1720,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
         struct file *file = iocb->ki_filp;
         struct inode *inode = file_inode(file);
         struct btrfs_root *root = BTRFS_I(inode)->root;
-        loff_t *ppos = &iocb->ki_pos;
         u64 start_pos;
+        u64 end_pos;
         ssize_t num_written = 0;
         ssize_t err = 0;
         size_t count, ocount;
@@ -1781,7 +1776,9 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
 
         start_pos = round_down(pos, root->sectorsize);
         if (start_pos > i_size_read(inode)) {
-                err = btrfs_cont_expand(inode, i_size_read(inode), start_pos);
+                /* Expand hole size to cover write data, preventing empty gap */
+                end_pos = round_up(pos + iov->iov_len, root->sectorsize);
+                err = btrfs_cont_expand(inode, i_size_read(inode), end_pos);
                 if (err) {
                         mutex_unlock(&inode->i_mutex);
                         goto out;
@@ -1793,7 +1790,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
 
         if (unlikely(file->f_flags & O_DIRECT)) {
                 num_written = __btrfs_direct_write(iocb, iov, nr_segs,
-                                                   pos, ppos, count, ocount);
+                                                   pos, count, ocount);
         } else {
                 struct iov_iter i;
 
@@ -1801,7 +1798,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
 
                 num_written = __btrfs_buffered_write(file, &i, pos);
                 if (num_written > 0)
-                        *ppos = pos + num_written;
+                        iocb->ki_pos = pos + num_written;
         }
 
         mutex_unlock(&inode->i_mutex);