[PATCH 1/2] staging: erofs: fix compile error without built-in decompression support

[Gao Xiang <hsiangkao@aol.com>]

This patch fixes incorrect code snippets due to spilt code
into small patches by mistake.

Link: https://lists.01.org/pipermail/kbuild-all/2018-July/050747.html
Link: https://lists.01.org/pipermail/kbuild-all/2018-July/050750.html
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
---
 I test several Kconfig option combinations and all these
combinations are successfully compiled.

Hi Chao,
 Could you please review this two patches first before merging
into staging-next tree?

Thanks,
Gao Xiang

 drivers/staging/erofs/internal.h  | 4 ++--
 drivers/staging/erofs/super.c     | 2 +-
 drivers/staging/erofs/unzip_vle.c | 7 ++++---
 drivers/staging/erofs/utils.c     | 7 ++++---
 4 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h
index 669f93ae6920..367b39fe46e5 100644
--- a/drivers/staging/erofs/internal.h
+++ b/drivers/staging/erofs/internal.h
@@ -260,9 +260,9 @@ static inline void erofs_workstation_cleanup_all(struct super_block *sb)
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
 #define EROFS_UNALLOCATED_CACHED_PAGE	((void *)0x5F0EF00D)
 
-extern int try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
+extern int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
 	struct erofs_workgroup *egrp);
-extern int try_to_free_cached_page(struct address_space *mapping,
+extern int erofs_try_to_free_cached_page(struct address_space *mapping,
 	struct page *page);
 #endif
 
diff --git a/drivers/staging/erofs/super.c b/drivers/staging/erofs/super.c
index 97da5c8a8ef3..1aec509c805f 100644
--- a/drivers/staging/erofs/super.c
+++ b/drivers/staging/erofs/super.c
@@ -269,7 +269,7 @@ static int managed_cache_releasepage(struct page *page, gfp_t gfp_mask)
 	BUG_ON(mapping->a_ops != &managed_cache_aops);
 
 	if (PagePrivate(page))
-		ret = try_to_free_cached_page(mapping, page);
+		ret = erofs_try_to_free_cached_page(mapping, page);
 
 	return ret;
 }
diff --git a/drivers/staging/erofs/unzip_vle.c b/drivers/staging/erofs/unzip_vle.c
index 7671fe8194ce..0e410a228cd4 100644
--- a/drivers/staging/erofs/unzip_vle.c
+++ b/drivers/staging/erofs/unzip_vle.c
@@ -131,8 +131,8 @@ static bool grab_managed_cache_pages(struct address_space *mapping,
 }
 
 /* called by erofs_shrinker to get rid of all compressed_pages */
-int try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
-				 struct erofs_workgroup *egrp)
+int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
+				       struct erofs_workgroup *egrp)
 {
 	struct z_erofs_vle_workgroup *const grp =
 		container_of(egrp, struct z_erofs_vle_workgroup, obj);
@@ -166,7 +166,8 @@ int try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
 	return 0;
 }
 
-int try_to_free_cached_page(struct address_space *mapping, struct page *page)
+int erofs_try_to_free_cached_page(struct address_space *mapping,
+				  struct page *page)
 {
 	struct erofs_sb_info *const sbi = EROFS_SB(mapping->host->i_sb);
 	const unsigned int clusterpages = erofs_clusterpages(sbi);
diff --git a/drivers/staging/erofs/utils.c b/drivers/staging/erofs/utils.c
index ee70bb9e1636..595cf90af9bb 100644
--- a/drivers/staging/erofs/utils.c
+++ b/drivers/staging/erofs/utils.c
@@ -160,7 +160,7 @@ unsigned long erofs_shrink_workstation(struct erofs_sb_info *sbi,
 		}
 
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
-		if (try_to_free_all_cached_pages(sbi, grp))
+		if (erofs_try_to_free_all_cached_pages(sbi, grp))
 			goto skip;
 
 		erofs_workgroup_unfreeze(grp, 1);
@@ -247,7 +247,9 @@ unsigned long erofs_shrink_scan(struct shrinker *shrink,
 		spin_unlock(&erofs_sb_list_lock);
 		sbi->shrinker_run_no = run_no;
 
-		/* add scan handlers here */
+#ifdef CONFIG_EROFS_FS_ZIP
+		freed += erofs_shrink_workstation(sbi, nr, false);
+#endif
 
 		spin_lock(&erofs_sb_list_lock);
 		/* Get the next list element before we move this one */
@@ -260,7 +262,6 @@ unsigned long erofs_shrink_scan(struct shrinker *shrink,
 		list_move_tail(&sbi->list, &erofs_sb_list);
 		mutex_unlock(&sbi->umount_mutex);
 
-		freed += erofs_shrink_workstation(sbi, nr, false);
 		if (freed >= nr)
 			break;
 	}
-- 
2.17.1