diff options
Diffstat (limited to 'include/linux/backing-dev.h')
| -rw-r--r-- | include/linux/backing-dev.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 898f8e1814ef..94c93c9c5f66 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -8,11 +8,15 @@ #ifndef _LINUX_BACKING_DEV_H #define _LINUX_BACKING_DEV_H +#include <asm/atomic.h> + /* * Bits in backing_dev_info.state */ enum bdi_state { BDI_pdflush, /* A pdflush thread is working this device */ + BDI_write_congested, /* The write queue is getting full */ + BDI_read_congested, /* The read queue is getting full */ BDI_unused, /* Available bits start here */ }; @@ -28,4 +32,14 @@ int writeback_acquire(struct backing_dev_info *bdi); int writeback_in_progress(struct backing_dev_info *bdi); void writeback_release(struct backing_dev_info *bdi); +static inline int bdi_read_congested(struct backing_dev_info *bdi) +{ + return test_bit(BDI_read_congested, &bdi->state); +} + +static inline int bdi_write_congested(struct backing_dev_info *bdi) +{ + return test_bit(BDI_write_congested, &bdi->state); +} + #endif /* _LINUX_BACKING_DEV_H */ |