diff options
Diffstat (limited to 'include/linux/blkdev_compat.h')
| -rw-r--r-- | include/linux/blkdev_compat.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/blkdev_compat.h b/include/linux/blkdev_compat.h index bd1b2bf54..a5294ceba 100644 --- a/include/linux/blkdev_compat.h +++ b/include/linux/blkdev_compat.h @@ -433,6 +433,21 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags) #endif /* + * 2.6.33 API change + * Discard granularity and alignment restrictions may now be set. For + * older kernels which do not support this it is safe to skip it. + */ +#ifdef HAVE_DISCARD_GRANULARITY +static inline void +blk_queue_discard_granularity(struct request_queue *q, unsigned int dg) +{ + q->limits.discard_granularity = dg; +} +#else +#define blk_queue_discard_granularity(x, dg) ((void)0) +#endif /* HAVE_DISCARD_GRANULARITY */ + +/* * Default Linux IO Scheduler, * Setting the scheduler to noop will allow the Linux IO scheduler to * still perform front and back merging, while leaving the request |