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authorChristoph Hellwig <hch@lst.de>2022-01-21 22:15:07 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-22 08:33:38 +0200
commit633423a09cb5cfe61438283e1ce49c23cf4a0611 (patch)
tree71756b84163f3815ea8e6ba6681140bee7057456
parentf328c1d16e4c764992895ac9c9425cea861b2ca0 (diff)
mm: mark swap_lock and swap_active_head static
swap_lock and swap_active_head are only used in swapfile.c, so mark them static. Link: https://lkml.kernel.org/r/20211224062246.1258487-12-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: Dan Streetman <ddstreet@ieee.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Hugh Dickins <hughd@google.com> Cc: Konrad Rzeszutek Wilk <Konrad.wilk@oracle.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Seth Jennings <sjenning@redhat.com> Cc: Vitaly Wool <vitaly.wool@konsulko.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/swapfile.h2
-rw-r--r--mm/swapfile.c4
2 files changed, 2 insertions, 4 deletions
diff --git a/include/linux/swapfile.h b/include/linux/swapfile.h
index 809cd01ef2c5..54078542134c 100644
--- a/include/linux/swapfile.h
+++ b/include/linux/swapfile.h
@@ -6,8 +6,6 @@
* 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);
extern unsigned long max_swapfile_size(void);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 82342c77791b..bf0df7aa7158 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -49,7 +49,7 @@ static bool swap_count_continued(struct swap_info_struct *, pgoff_t,
unsigned char);
static void free_swap_count_continuations(struct swap_info_struct *);
-DEFINE_SPINLOCK(swap_lock);
+static DEFINE_SPINLOCK(swap_lock);
static unsigned int nr_swapfiles;
atomic_long_t nr_swap_pages;
/*
@@ -71,7 +71,7 @@ static const char Unused_offset[] = "Unused swap offset entry ";
* all active swap_info_structs
* protected with swap_lock, and ordered by priority.
*/
-PLIST_HEAD(swap_active_head);
+static PLIST_HEAD(swap_active_head);
/*
* all available (active, not full) swap_info_structs