staging: erofs: introduce MNGD_MAPPING helper

This patch introduces MNGD_MAPPING to wrap up
sbi->managed_cache->i_mapping, which will be used
to solve too many #ifdefs in a single function.

No logic changes.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h
index 8929443558676263eb7ed1252a02fbad22f8ee9b..b78d6e4c12ab4270c03641553baee423198de92f 100644 (file)
--- a/drivers/staging/erofs/internal.h
+++ b/drivers/staging/erofs/internal.h
@@ -295,6 +295,10 @@ extern int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
        struct erofs_workgroup *egrp);
 extern int erofs_try_to_free_cached_page(struct address_space *mapping,
        struct page *page);
+
+#define MNGD_MAPPING(sbi)      ((sbi)->managed_cache->i_mapping)
+#else
+#define MNGD_MAPPING(sbi)      (NULL)
 #endif
 
 #define DEFAULT_MAX_SYNC_DECOMPRESS_PAGES      3

diff --git a/drivers/staging/erofs/unzip_vle.c b/drivers/staging/erofs/unzip_vle.c
index 4404ea6fb9e436136e314f2cbd2692d4b0659c8c..ac2e30474520f8fc6c74660d6926be44db2eaf6e 100644 (file)
--- a/drivers/staging/erofs/unzip_vle.c
+++ b/drivers/staging/erofs/unzip_vle.c
@@ -165,7 +165,7 @@ int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
 {
        struct z_erofs_vle_workgroup *const grp =
                container_of(egrp, struct z_erofs_vle_workgroup, obj);
-       struct address_space *const mapping = sbi->managed_cache->i_mapping;
+       struct address_space *const mapping = MNGD_MAPPING(sbi);
        const int clusterpages = erofs_clusterpages(sbi);
        int i;
 
@@ -617,7 +617,7 @@ static int z_erofs_do_read_page(struct z_erofs_vle_frontend *fe,
        struct z_erofs_vle_work *work = builder->work;
 
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
-       struct address_space *const mngda = sbi->managed_cache->i_mapping;
+       struct address_space *const mc = MNGD_MAPPING(sbi);
        struct z_erofs_vle_workgroup *grp;
        bool noio_outoforder;
 #endif
@@ -665,7 +665,7 @@ static int z_erofs_do_read_page(struct z_erofs_vle_frontend *fe,
        grp = fe->builder.grp;
 
        /* let's do out-of-order decompression for noio */
-       noio_outoforder = grab_managed_cache_pages(mngda,
+       noio_outoforder = grab_managed_cache_pages(mc,
                erofs_blknr(map->m_pa),
                grp->compressed_pages, erofs_blknr(map->m_plen),
                /* compressed page caching selection strategy */
@@ -764,7 +764,7 @@ static inline void z_erofs_vle_read_endio(struct bio *bio)
        unsigned int i;
        struct bio_vec *bvec;
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
-       struct address_space *mngda = NULL;
+       struct address_space *mc = NULL;
 #endif
 
        bio_for_each_segment_all(bvec, bio, i) {
@@ -775,18 +775,18 @@ static inline void z_erofs_vle_read_endio(struct bio *bio)
                BUG_ON(!page->mapping);
 
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
-               if (unlikely(!mngda && !z_erofs_is_stagingpage(page))) {
+               if (unlikely(!mc && !z_erofs_is_stagingpage(page))) {
                        struct inode *const inode = page->mapping->host;
                        struct super_block *const sb = inode->i_sb;
 
-                       mngda = EROFS_SB(sb)->managed_cache->i_mapping;
+                       mc = MNGD_MAPPING(EROFS_SB(sb));
                }
 
                /*
-                * If mngda has not gotten, it equals NULL,
+                * If mc has not gotten, it equals NULL,
                 * however, page->mapping never be NULL if working properly.
                 */
-               cachemngd = (page->mapping == mngda);
+               cachemngd = (page->mapping == mc);
 #endif
 
                if (unlikely(err))
@@ -810,9 +810,6 @@ static int z_erofs_vle_unzip(struct super_block *sb,
        struct list_head *page_pool)
 {
        struct erofs_sb_info *const sbi = EROFS_SB(sb);
-#ifdef EROFS_FS_HAS_MANAGED_CACHE
-       struct address_space *const mngda = sbi->managed_cache->i_mapping;
-#endif
        const unsigned int clusterpages = erofs_clusterpages(sbi);
 
        struct z_erofs_pagevec_ctor ctor;
@@ -903,7 +900,7 @@ static int z_erofs_vle_unzip(struct super_block *sb,
                if (z_erofs_is_stagingpage(page))
                        continue;
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
-               else if (page->mapping == mngda) {
+               if (page->mapping == MNGD_MAPPING(sbi)) {
                        BUG_ON(PageLocked(page));
                        BUG_ON(!PageUptodate(page));
                        continue;
@@ -981,7 +978,7 @@ static int z_erofs_vle_unzip(struct super_block *sb,
                page = compressed_pages[i];
 
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
-               if (page->mapping == mngda)
+               if (page->mapping == MNGD_MAPPING(sbi))
                        continue;
 #endif
                /* recycle all individual staging pages */
@@ -1114,7 +1111,7 @@ static bool z_erofs_vle_submit_all(struct super_block *sb,
        const unsigned int clusterpages = erofs_clusterpages(sbi);
        const gfp_t gfp = GFP_NOFS;
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
-       struct address_space *const mngda = sbi->managed_cache->i_mapping;
+       struct address_space *const mc = MNGD_MAPPING(sbi);
        struct z_erofs_vle_workgroup *lstgrp_noio = NULL, *lstgrp_io = NULL;
 #endif
        struct z_erofs_vle_unzip_io *ios[1 + __FSIO_1];
@@ -1187,7 +1184,7 @@ static bool z_erofs_vle_submit_all(struct super_block *sb,
                        cachemngd = true;
                        goto do_allocpage;
                } else if (page) {
-                       if (page->mapping != mngda)
+                       if (page->mapping != mc)
                                BUG_ON(PageUptodate(page));
                        else if (recover_managed_page(grp, page)) {
                                /* page is uptodate, skip io submission */
@@ -1210,7 +1207,7 @@ static bool z_erofs_vle_submit_all(struct super_block *sb,
                                goto repeat;
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
                        } else if (cachemngd && !add_to_page_cache_lru(page,
-                               mngda, first_index + i, gfp)) {
+                                  mc, first_index + i, gfp)) {
                                set_page_private(page, (unsigned long)grp);
                                SetPagePrivate(page);
 #endif