From: Changbin Du Date: Thu, 16 Nov 2017 01:36:06 +0000 (-0800) Subject: mm/swap_state.c: declare a few variables as __read_mostly X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=783cb68ee2d25d621326366c0b615bf2ccf3b402;p=openwrt%2Fstaging%2Fblogic.git 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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)