From: Changbin Du <changbin.du@xxxxxxxxx> Subject: 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@xxxxxxxxx Signed-off-by: Changbin Du <changbin.du@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/swap_state.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff -puN mm/swap_state.c~mm-swap_statec-declare-a-few-variables-as-__read_mostly mm/swap_state.c --- a/mm/swap_state.c~mm-swap_statec-declare-a-few-variables-as-__read_mostly +++ a/mm/swap_state.c @@ -36,9 +36,9 @@ static const struct address_space_operat #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) _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
