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Commit 783cb68e authored by Changbin Du's avatar Changbin Du Committed by Linus Torvalds
Browse files

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: default avatarChangbin Du <changbin.du@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4675ff05

mm/swap_state.c

+3 −3
Original line number Original line Diff line number Diff line
@@ -36,9 +36,9 @@ static const struct address_space_operations swap_aops = { 
#endif

#endif

};

};





struct address_space *swapper_spaces[MAX_SWAPFILES];

struct address_space *swapper_spaces[MAX_SWAPFILES] __read_mostly;

static unsigned int nr_swapper_spaces[MAX_SWAPFILES];

static unsigned int nr_swapper_spaces[MAX_SWAPFILES] __read_mostly;

bool swap_vma_readahead = true;

bool swap_vma_readahead __read_mostly = true;





#define SWAP_RA_WIN_SHIFT	(PAGE_SHIFT / 2)

#define SWAP_RA_WIN_SHIFT	(PAGE_SHIFT / 2)

#define SWAP_RA_HITS_MASK	((1UL << SWAP_RA_WIN_SHIFT) - 1)

#define SWAP_RA_HITS_MASK	((1UL << SWAP_RA_WIN_SHIFT) - 1)