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Message-ID: <20220915035003.3347466-2-liushixin2@huawei.com>
Date: Thu, 15 Sep 2022 11:49:59 +0800
From: Liu Shixin <liushixin2@...wei.com>
To: Seth Jennings <sjenning@...hat.com>,
Dan Streetman <ddstreet@...e.org>,
Vitaly Wool <vitaly.wool@...sulko.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Nathan Chancellor <nathan@...nel.org>,
"Christoph Hellwig" <hch@....de>
CC: <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
Liu Shixin <liushixin2@...wei.com>,
Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH v5 1/5] Revert "mm: mark swap_lock and swap_active_head static"
This reverts commit 633423a09cb5cfe61438283e1ce49c23cf4a0611.
swap_lock and swap_active_head will be used in next patch, so export it
again.
Signed-off-by: Liu Shixin <liushixin2@...wei.com>
---
include/linux/swapfile.h | 2 ++
mm/swapfile.c | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/linux/swapfile.h b/include/linux/swapfile.h
index 7ed529a77c5b..a2540b8396e2 100644
--- a/include/linux/swapfile.h
+++ b/include/linux/swapfile.h
@@ -6,6 +6,8 @@
* these were static in swapfile.c but frontswap.c needs them and we don't
* want to expose them to the dozens of source files that include swap.h
*/
+extern spinlock_t swap_lock;
+extern struct plist_head swap_active_head;
extern struct swap_info_struct *swap_info[];
extern unsigned long generic_max_swapfile_size(void);
unsigned long arch_max_swapfile_size(void);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 4efcfe34e45b..6cdb34c01dd3 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -51,7 +51,7 @@ static bool swap_count_continued(struct swap_info_struct *, pgoff_t,
unsigned char);
static void free_swap_count_continuations(struct swap_info_struct *);
-static DEFINE_SPINLOCK(swap_lock);
+DEFINE_SPINLOCK(swap_lock);
static unsigned int nr_swapfiles;
atomic_long_t nr_swap_pages;
/*
@@ -77,7 +77,7 @@ static const char Unused_offset[] = "Unused swap offset entry ";
* all active swap_info_structs
* protected with swap_lock, and ordered by priority.
*/
-static PLIST_HEAD(swap_active_head);
+PLIST_HEAD(swap_active_head);
/*
* all available (active, not full) swap_info_structs
--
2.25.1
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