The quilt patch titled
Subject: Revert "mm: mark swap_lock and swap_active_head static"
has been removed from the -mm tree. Its filename was
revert-mm-mark-swap_lock-and-swap_active_head-static.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
From: Liu Shixin <liushixin2@xxxxxxxxxx>
Subject: Revert "mm: mark swap_lock and swap_active_head static"
Date: Mon, 29 Aug 2022 21:22:58 +0800
Patch series "Delay the initializaton of zswap", v4.
In the initialization of zswap, about 18MB memory will be allocated for
zswap_pool. Since not all users use zswap, the memory may be wasted.
Save the memory for these users by delaying the initialization of zswap to
first enablement.
This patch (of 5):
This reverts commit 633423a09cb5cfe61438283e1ce49c23cf4a0611.
swap_lock and swap_active_head will be used in the next patch, so export
them again.
Link: https://lkml.kernel.org/r/20220829132302.3367054-3-liushixin2@xxxxxxxxxx
Signed-off-by: Liu Shixin <liushixin2@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Dan Streetman <ddstreet@xxxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Seth Jennings <sjenning@xxxxxxxxxx>
Cc: Vitaly Wool <vitaly.wool@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/swapfile.h | 2 ++
mm/swapfile.c | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)
--- a/include/linux/swapfile.h~revert-mm-mark-swap_lock-and-swap_active_head-static
+++ a/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);
--- a/mm/swapfile.c~revert-mm-mark-swap_lock-and-swap_active_head-static
+++ a/mm/swapfile.c
@@ -51,7 +51,7 @@ static bool swap_count_continued(struct
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[] = "Unu
* 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
_
Patches currently in -mm which might be from liushixin2@xxxxxxxxxx are
revert-frontswap-simplify-frontswap_register_ops.patch
mm-zswap-replace-zswap_init_started-failed-with-zswap_init_state.patch
mm-zswap-delay-the-initializaton-of-zswap-until-the-first-enablement.patch
mm-zswap-skip-confusing-print-info.patch
mm-thp-simplify-has_transparent_hugepage-by-using-is_builtin.patch
mm-thp-remove-redundant-config_transparent_hugepage.patch
mm-kmemleak-make-create_object-return-void.patch
mm-huge_memory-prevent-thp_zero_page_alloc-increased-twice.patch
mm-memcontrol-use-kstrtobool-for-swapaccount-param-parsing.patch
