linux-kernel - [PATCH v2 2/4] mm/swap: remove unused local variable nr

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Date:   Thu, 20 May 2021 21:40:20 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <willy@...radead.org>, <linux-kernel@...r.kernel.org>,
        <linux-mm@...ck.org>, <linmiaohe@...wei.com>
Subject: [PATCH v2 2/4] mm/swap: remove unused local variable nr_shadows

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

Reviewed-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/swap_state.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/mm/swap_state.c b/mm/swap_state.c
index df5405384520..1a2ba4056f37 100644
--- 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);
 
-- 
2.23.0