btrfs: unexport btrfs_subpage_start_writer() and btrfs_subpage_end_and_test_writer()

Both functions were introduced in commit 1e1de38792e0 ("btrfs: make
process_one_page() to handle subpage locking"), but they have never
been utilized out of subpage code.  So just unexport them.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c
index 0e49dab..24f8be5 100644 (file)
--- a/fs/btrfs/subpage.c
+++ b/fs/btrfs/subpage.c
@@ -290,8 +290,8 @@ static void btrfs_subpage_clamp_range(struct folio *folio, u64 *start, u32 *len)
                             orig_start + orig_len) - *start;
 }
 
-void btrfs_subpage_start_writer(const struct btrfs_fs_info *fs_info,
-                               struct folio *folio, u64 start, u32 len)
+static void btrfs_subpage_start_writer(const struct btrfs_fs_info *fs_info,
+                                      struct folio *folio, u64 start, u32 len)
 {
        struct btrfs_subpage *subpage = folio_get_private(folio);
        const int nbits = (len >> fs_info->sectorsize_bits);
@@ -304,8 +304,8 @@ void btrfs_subpage_start_writer(const struct btrfs_fs_info *fs_info,
        ASSERT(ret == nbits);
 }
 
-bool btrfs_subpage_end_and_test_writer(const struct btrfs_fs_info *fs_info,
-                                      struct folio *folio, u64 start, u32 len)
+static bool btrfs_subpage_end_and_test_writer(const struct btrfs_fs_info *fs_info,
+                                             struct folio *folio, u64 start, u32 len)
 {
        struct btrfs_subpage *subpage = folio_get_private(folio);
        const int nbits = (len >> fs_info->sectorsize_bits);

diff --git a/fs/btrfs/subpage.h b/fs/btrfs/subpage.h
index 55fc42d..97ba2c1 100644 (file)
--- a/fs/btrfs/subpage.h
+++ b/fs/btrfs/subpage.h
@@ -98,10 +98,6 @@ void btrfs_subpage_start_reader(const struct btrfs_fs_info *fs_info,
 void btrfs_subpage_end_reader(const struct btrfs_fs_info *fs_info,
                              struct folio *folio, u64 start, u32 len);
 
-void btrfs_subpage_start_writer(const struct btrfs_fs_info *fs_info,
-                               struct folio *folio, u64 start, u32 len);
-bool btrfs_subpage_end_and_test_writer(const struct btrfs_fs_info *fs_info,
-                                      struct folio *folio, u64 start, u32 len);
 int btrfs_folio_start_writer_lock(const struct btrfs_fs_info *fs_info,
                                  struct folio *folio, u64 start, u32 len);
 void btrfs_folio_end_writer_lock(const struct btrfs_fs_info *fs_info,