staging: erofs: rename strange variable names in z_erofs_vle_frontend

Previously, 2 members called `initial' and `cachedzone_la' are used
for applying caching policy (whether the workgroup is at either end),
which are hard to understand, rename them to `backmost' and `headoffset'.

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/unzip_vle.c b/drivers/staging/erofs/unzip_vle.c
index fab907e0fe06c06f9c0473f5952b8031571b854e..f5d088fdf7f2b41160a80db3a0134202f0c2a7a8 100644 (file)
--- a/drivers/staging/erofs/unzip_vle.c
+++ b/drivers/staging/erofs/unzip_vle.c
@@ -587,10 +587,9 @@ struct z_erofs_vle_frontend {
 
        z_erofs_vle_owned_workgrp_t owned_head;
 
-       bool initial;
-#if (EROFS_FS_ZIP_CACHE_LVL >= 2)
-       erofs_off_t cachedzone_la;
-#endif
+       /* used for applying cache strategy on the fly */
+       bool backmost;
+       erofs_off_t headoffset;
 };
 
 #define VLE_FRONTEND_INIT(__i) { \
@@ -601,7 +600,7 @@ struct z_erofs_vle_frontend {
        }, \
        .builder = VLE_WORK_BUILDER_INIT(), \
        .owned_head = Z_EROFS_VLE_WORKGRP_TAIL, \
-       .initial = true, }
+       .backmost = true, }
 
 static int z_erofs_do_read_page(struct z_erofs_vle_frontend *fe,
                                struct page *page,
@@ -644,7 +643,7 @@ repeat:
        debugln("%s: [out-of-range] pos %llu", __func__, offset + cur);
 
        if (z_erofs_vle_work_iter_end(builder))
-               fe->initial = false;
+               fe->backmost = false;
 
        map->m_la = offset + cur;
        map->m_llen = 0;
@@ -670,8 +669,8 @@ repeat:
                erofs_blknr(map->m_pa),
                grp->compressed_pages, erofs_blknr(map->m_plen),
                /* compressed page caching selection strategy */
-               fe->initial | (EROFS_FS_ZIP_CACHE_LVL >= 2 ?
-                       map->m_la < fe->cachedzone_la : 0));
+               fe->backmost | (EROFS_FS_ZIP_CACHE_LVL >= 2 ?
+                               map->m_la < fe->headoffset : 0));
 
        if (noio_outoforder && builder_is_followed(builder))
                builder->role = Z_EROFS_VLE_WORK_PRIMARY;
@@ -1317,9 +1316,8 @@ static int z_erofs_vle_normalaccess_readpage(struct file *file,
 
        trace_erofs_readpage(page, false);
 
-#if (EROFS_FS_ZIP_CACHE_LVL >= 2)
-       f.cachedzone_la = (erofs_off_t)page->index << PAGE_SHIFT;
-#endif
+       f.headoffset = (erofs_off_t)page->index << PAGE_SHIFT;
+
        err = z_erofs_do_read_page(&f, page, &pagepool);
        (void)z_erofs_vle_work_iter_end(&f.builder);
 
@@ -1355,9 +1353,8 @@ static int z_erofs_vle_normalaccess_readpages(struct file *filp,
        trace_erofs_readpages(mapping->host, lru_to_page(pages),
                              nr_pages, false);
 
-#if (EROFS_FS_ZIP_CACHE_LVL >= 2)
-       f.cachedzone_la = (erofs_off_t)lru_to_page(pages)->index << PAGE_SHIFT;
-#endif
+       f.headoffset = (erofs_off_t)lru_to_page(pages)->index << PAGE_SHIFT;
+
        for (; nr_pages; --nr_pages) {
                struct page *page = lru_to_page(pages);