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authorChangbin Du <changbin.du@intel.com>2017-11-15 17:36:06 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 18:21:05 -0800
commit783cb68ee2d25d621326366c0b615bf2ccf3b402 (patch)
tree4868c340c671bd5b7518c53d0f414f2213e97a6b /mm/swap_state.c
parent4675ff05de2d76d167336b368bd07f3fef6ed5a6 (diff)
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mm/swap_state.c: declare a few variables as __read_mostly
These global variables are only set during initialization or rarely change, so declare them as __read_mostly. Link: http://lkml.kernel.org/r/1507802349-5554-1-git-send-email-changbin.du@intel.com Signed-off-by: Changbin Du <changbin.du@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap_state.c')
-rw-r--r--mm/swap_state.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/swap_state.c b/mm/swap_state.c
index f2face8b889e..374d446f7a0a 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -36,9 +36,9 @@ static const struct address_space_operations swap_aops = {
#endif
};
-struct address_space *swapper_spaces[MAX_SWAPFILES];
-static unsigned int nr_swapper_spaces[MAX_SWAPFILES];
-bool swap_vma_readahead = true;
+struct address_space *swapper_spaces[MAX_SWAPFILES] __read_mostly;
+static unsigned int nr_swapper_spaces[MAX_SWAPFILES] __read_mostly;
+bool swap_vma_readahead __read_mostly = true;
#define SWAP_RA_WIN_SHIFT (PAGE_SHIFT / 2)
#define SWAP_RA_HITS_MASK ((1UL << SWAP_RA_WIN_SHIFT) - 1)