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mm/swap_state.c: declare a few variables as __read_mostly

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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>
This commit is contained in:
Changbin Du 2017-11-15 17:36:06 -08:00 committed by Linus Torvalds
parent 4675ff05de
commit 783cb68ee2
1 changed files with 3 additions and 3 deletions
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mm/swap_state.c
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@ -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)