Signed-off-by: Andrew Morton --- include/linux/page-flags.h | 5 +++++ 1 file changed, 5 insertions(+) diff -puN include/linux/page-flags.h~ext4-booked-page-flag include/linux/page-flags.h --- a/include/linux/page-flags.h~ext4-booked-page-flag +++ a/include/linux/page-flags.h @@ -89,6 +89,7 @@ #define PG_mappedtodisk 16 /* Has blocks allocated on-disk */ #define PG_reclaim 17 /* To be reclaimed asap */ #define PG_buddy 19 /* Page is free, on buddy lists */ +#define PG_booked 20 /* Has blocks reserved on-disk */ /* PG_readahead is only used for file reads; PG_reclaim is only for writes */ #define PG_readahead PG_reclaim /* Reminder to do async read-ahead */ @@ -211,6 +212,10 @@ static inline void SetPageUptodate(struc #define SetPageReadahead(page) set_bit(PG_readahead, &(page)->flags) #define ClearPageReadahead(page) clear_bit(PG_readahead, &(page)->flags) +#define PageBooked(page) test_bit(PG_booked, &(page)->flags) +#define SetPageBooked(page) set_bit(PG_booked, &(page)->flags) +#define ClearPageBooked(page) clear_bit(PG_booked, &(page)->flags) + #define PageReclaim(page) test_bit(PG_reclaim, &(page)->flags) #define SetPageReclaim(page) set_bit(PG_reclaim, &(page)->flags) #define ClearPageReclaim(page) clear_bit(PG_reclaim, &(page)->flags) _