mm/swap: remove unused local variable nr_shadows

Since commit 55c653b71e8c ("mm: stop accounting shadow entries"),
nr_shadows is not used anymore.

Link: https://lkml.kernel.org/r/20210520134022.1370406-3-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/swap_state.c b/mm/swap_state.c
index df54053..1a2ba40 100644 (file)
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -114,8 +114,6 @@ int add_to_swap_cache(struct page *page, swp_entry_t entry,
        SetPageSwapCache(page);
 
        do {
-               unsigned long nr_shadows = 0;
-
                xas_lock_irq(&xas);
                xas_create_range(&xas);
                if (xas_error(&xas))
@@ -124,7 +122,6 @@ int add_to_swap_cache(struct page *page, swp_entry_t entry,
                        VM_BUG_ON_PAGE(xas.xa_index != idx + i, page);
                        old = xas_load(&xas);
                        if (xa_is_value(old)) {
-                               nr_shadows++;
                                if (shadowp)
                                        *shadowp = old;
                        }
@@ -260,7 +257,6 @@ void clear_shadow_from_swap_cache(int type, unsigned long begin,
        void *old;
 
        for (;;) {
-               unsigned long nr_shadows = 0;
                swp_entry_t entry = swp_entry(type, curr);
                struct address_space *address_space = swap_address_space(entry);
                XA_STATE(xas, &address_space->i_pages, curr);
@@ -270,7 +266,6 @@ void clear_shadow_from_swap_cache(int type, unsigned long begin,
                        if (!xa_is_value(old))
                                continue;
                        xas_store(&xas, NULL);
-                       nr_shadows++;
                }
                xa_unlock_irq(&address_space->i_pages);